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Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. Five9 has led the cloud revolution in contact centers, helping organisations transition from legacy premise-based solutions to the cloud. The cloud contact center market has become the hot space for innovation in real-time communications, and is the tip of the spear for the application of Artificial Intelligence, especially Generative AI and Large Language Models (LLM). Our innovative AI team is responsible for developing a suite of leading edge AI products built upon industry-leading AI tech from vendors like OpenAI, Google, and Amazon. These products include enterprise voice and chatbots (think: ChatGPT for businesses), agent assistance, and conversation analytics. This team - the fastest growing at Five9 - is seeking a talented and experienced Senior Front End React/Redux Software Engineer. In this role, you will be part of the team that builds software that brings AI technologies to users. Prior AI experience is not required - you will receive on-the-job experience for some of the hottest skills on the market. An ideal candidate for us is an experienced engineer who is passionate about building high performance web platforms and applications, a brilliant problem solver and a creative self-starter. Key Responsibilities: Implement UX designs by working with UX Designers on a day-to-day basis, using React/Redux based framework. Build custom widgets for dashboards developed using Google Looker Studio plugins. Be part of an agile team to develop a scalable, highly available application platform using modern PaaS platforms such as GCP. Participate and contribute to requirements analysis and grooming. Understand how to leverage PaaS components, such as CDN, noSQL databases when developing software in order to achieve scalability, reliability, and operability. Document and communicate clearly architecture and implementation solutions. Have ownership of your code in production, including on-call, troubleshooting. Key Skills: 5+ years software development experience. React/Redux focus. Highly proficient in JavaScript and TypeScript. Experience in operational code ownership – on-call, troubleshooting, uptime Experience in applying modern UI design patterns and separating concerns in a distributed system. Must have experience working within an Agile/Scrum team. Positive, self-motivated and enthusiastic attitude with a strong sense of ownership. Strong pro-active communication skills, both verbal and written. Experience in contact center software is a plus but not required. Experience with custom widget development using Google Looker Studio is a plus but not required. Workplace location: This role is fully remote for candidates who reside outside Porto, Maia, Matosinhos, Gondomar, Valongo e Vila Nova de Gaia. Candidates who reside within those municipalities would be required to work in-office 3 days a week. Benefits: Five9 Shares Bonus Scheme 10% Flexi Benefit Meal Allowance Medical Insurance Life Insurance 25 day Annual Leave + Public Holidays Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. Five9 is committed to providing reasonable accommodations for qualified individuals with disabilities throughout the application and interview process. If you need assistance or an accommodation due to a disability, please contact us at accommodations@five9.com to request an accommodation. Requests will be handled confidentially and in accordance with applicable law. View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal . Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. As a Senior Software Engineer on the Cortex Management Team, you will design, develop, and maintain backend software solutions supporting Five9’s AI initiatives. This role focuses on building scalable, reliable, and high performance backend systems that power end to end platform capabilities. You will be responsible for backend architecture, service design, implementation, testing, and documentation. Working closely with product owners and key stakeholders, you will translate requirements into robust backend services and APIs. The role also involves deep technical exploration of emerging technologies and partnering with product teams to bring innovative ideas into production. In addition, this position plays a key role in mentoring other engineers and driving backend engineering best practices across Five9. How You Contribute • Leverage strong expertise in programming languages, frameworks, and development methodologies to solve complex backend and distributed systems challenges. • Write high quality, efficient, and maintainable backend code by following best practices and contributing to core services, APIs, and platform capabilities. • Troubleshoot and resolve complex production and architectural issues by identifying root causes and implementing scalable solutions. • Ensure development stays on track, deliverables meet milestones, and solutions align with business and platform objectives. • Collaborate closely with cross functional teams including product managers, other backend development teams, frontend engineers, and quality assurance to ensure alignment on requirements, functionality, and delivery. • Follow and contribute to engineering processes, service documentation, technical specifications, and API contracts. • Ensure that the development stays on track, milestones are met, and the project aligns with business objectives. Required Skills and Qualifications • 5+ years of industry experience in Java backend development. • Strong proficiency with server side technologies, including: o REST API design and implementation o Microservice architectures o Backend frameworks such as Spring Boot o Databases (SQL, NoSQL, Redis) • Hands on experience designing and implementing scalable, high performance microservices that expose REST APIs. • Experience solving complex problems that span multiple services, products, or distributed systems. • Solid understanding of security best practices and the ability to implement measures to protect applications and data. • Ability to work both independently and as part of a collaborative engineering team. • Strong commitment to delivering high quality, performant, and scalable backend solutions on time and within scope. • Proven ability to mentor other developers through direct guidance and code reviews. • Bachelor’s degree (or equivalent) in a relevant discipline. Desirable Qualifications • Experience with Google Cloud Platform (GCP), Kubernetes, Build tools (Gradle preferred) and CI/CD pipelines (Gitlab preferred) • Experience with Event Driven messaging systems • Experience with Contact Centre technologies, including IVR, Virtual Agents, VoIP, and telecommunications service providers. • Experience with AI Development Tools (Claude preferred) Key stakeholders • Service owners and their teams • Technical leadership and senior management • Engineering teams This role is hybrid and requires 3 days a week in office . Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. Five9 is committed to providing reasonable accommodations for qualified individuals with disabilities throughout the application and interview process. If you need assistance or an accommodation due to a disability, please contact us at accommodations@five9.com to request an accommodation. Requests will be handled confidentially and in accordance with applicable law. View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal . Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. About Five9 Five9 is a leading provider of cloud software for the enterprise contact center market, bringing the power of the cloud to thousands of customers and facilitating more than three billion customer interactions annually. Since 2001, Five9 has led the cloud revolution in contact centers, helping organizations transition from legacy premise-based solutions to the cloud. Five9 provides businesses with cloud contact center software that is reliable, secure, compliant and scalable, which is designed to create exceptional customer experiences, increase agent productivity and deliver tangible business results. Role Overview To complement our rapid growth, we are actively sourcing for a Network Engineer to operate in a 24/7 Software-as-a-Service (SaaS) environment maintaining IP Networking components in a production setting. In this role you will: Design, engineer, and oversee highly scalable CI/CD pipelines for automated testing, digital-twin dry-running, and zero-downtime deployment of configurations across massive physical and virtual network fabrics. Champion the "Network-as-Code" paradigm, establishing enterprise-wide GitOps workflows and enforcing source control (Git) as the absolute single source of truth for all network state, policy, and infrastructure design. Drive the strategic vision for network automation, designing complex, reusable code frameworks and Playbooks to permanently eliminate manual configuration and operational "toil" at a global scale. Design and optimize massive-scale software-defined networks (SDN) and container networking interfaces (CNIs) supporting ultra-high-throughput, multi-region cloud and bare-metal environments. Serve as the ultimate technical authority (SME / Tier 4) for complex network, routing, and overlay issues, rapidly deciphering and resolving the most difficult challenges across physical underlays and software-defined layers. Design and implement next-generation telemetry, monitoring, and alerting-as-code platforms, leveraging advanced heuristics for proactive auto-remediation of performance, security, and capacity issues. Key Responsibilities Partner at a strategic level with Enterprise Designers, SRE leaders, and Platform teams to build and implement highly resilient, secure, and multi-tenant-isolated network infrastructure. Establish coding standards and write/review sophisticated Infrastructure-as-Code (IaC) using Ansible, Terraform, Helm, Python, and Bash. Lead the engineering, deployment, and optimization of modern overlay and container networking solutions, particularly VXLAN, OVN (Open Virtual Network), and Project Calico. Design the automation of complex security and traffic management policies across enterprise-grade firewalls (Palo Alto/Fortinet) and load balancers (F5 BIG-IP/Cloudflare/Octavia). Embed "Security-as-Code" directly into CI/CD pipelines, engineering automated validation gates for security groups, ACLs, and firewall rules prior to production pushes. Engineer robust, automated network validation suites to continuously verify network health, state, and complex routing tables (BGP, OSPF) pre- and post-deployment. Drive the adoption of code-based infrastructure definitions and dynamic, living technical documentation (e.g., NetBox, Git Markdown), setting the standard for documentation across the engineering organization. Qualifications & Skills 5+ years of progressive experience in Network Engineering, DevOps, or SRE roles, with a deeply established focus on large-scale network design, automation, and Infrastructure-as-Code (IaC). Expert-level proficiency in engineering complex network automation tooling utilizing Ansible, Terraform, and Python (including deep experience with network-specific libraries like Netmiko, Nornir, or NAPALM). Deep design and operational expertise with massive-scale software-defined networks (SDN) and overlays, specifically VXLAN, OVN, and Project Calico. Advanced mastery of Kubernetes networking designs (CNIs, Ingress controllers, Service Mesh, Kube-Proxy behaviors) at an enterprise scale. Extensive, expert-level experience engineering and automating enterprise edge, routing, and security fabrics, including Cisco Nexus (9k/7k/5k/2k), Arista, Versa SD-WAN, and firewalls (Palo Alto and Fortinet). Authoritative knowledge of API-driven application delivery and load balancing across monolithic and cloud-native stacks (e.g., F5 BIG-IP AS3, Cloudflare APIs, Octavia LBaaS). Deep Linux internals and networking expertise, including advanced knowledge of Linux network namespaces, virtual interfaces, eBPF/iptables, and kernel-level routing. CCIE-level (or equivalent) mastery of core routing protocols (BGP, OSPF, MPLS, EVPN) and a comprehensive understanding of how virtual/container overlay networks map to physical underlays. Extensive experience designing and scaling CI/CD platforms (e.g., GitLab CI, Jenkins, GitHub Actions) and implementing test-driven development (TDD) for infrastructure changes. Unparalleled troubleshooting capabilities utilizing advanced packet analysis (tcpdump/Wireshark), NetFlow, and log aggregation platforms to trace asymmetric routing and microburst traffic across hybrid fabrics. Proven track record of technical leadership, including mentoring mid-level engineers, leading design review boards, and driving cross-functional engineering initiatives. Deep telecommunications background, specifically VoIP, RTP, SIP peering/trunking, and Session Border Controllers (SBC), is highly advantageous. Exceptional verbal and written communication skills, with the ability to translate complex technical concepts to executive stakeholders while fostering a collaborative, DevOps-oriented engineering culture. Diversity & Inclusion Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. This role is hybrid and requires 3 days a week in office . Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. Five9 is committed to providing reasonable accommodations for qualified individuals with disabilities throughout the application and interview process. If you need assistance or an accommodation due to a disability, please contact us at accommodations@five9.com to request an accommodation. Requests will be handled confidentially and in accordance with applicable law. View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal . Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. Team The Devops Engineer would be an active member within the Voice Application Services team, responsible for providing automation and test support for the SW releases of Five9. Key Responsibilities Design, implement, and maintain infrastructure as code using tools like Ansible and Terraform Build and manage scalable cloud infrastructure on AWS and GCP Develop and maintain CI/CD pipelines using platforms such as GitLab CI/CD, or similar Automate deployment, monitoring, and operational workflows across distributed systems Collaborate with Development, QA, and Operations teams to ensure seamless delivery and high system reliability Monitor system performance, troubleshoot issues, and implement solutions to improve availability and scalability Develop and maintain reusable automation modules and frameworks Identify inefficiencies in existing processes and drive improvements in automation and operational workflows Work with REST APIs and integrate services across systems and platforms Leverage AI-assisted coding tools such as Claude Code or GitHub Copilot to improve productivity and code quality Support and manage voice infrastructure components, including protocols such as SIP (Session Initiation Protocol) and RTP (Real-time Transport Protocol) Qualifications & Skills 5+ years of experience in DevOps, SRE, or infrastructure engineering roles (preferably in telecom, SaaS, or service provider environments) Hands-on experience with Ansible and Terraform, including writing and maintaining reusable modules Strong experience with cloud platforms such as AWS and GCP Proficiency in Unix/Linux systems, including CLI-based administration and shell scripting Solid understanding of CI/CD pipelines (GitLab, or similar) Demonstrated understanding of AI-assisted development tools (e.g., Claude Code, GitHub Copilot) Familiarity with voice technologies and protocols such as SIP and RTP Strong troubleshooting, debugging, and problem-solving skills Excellent written and verbal communication skills in English Ability to work effectively in distributed, cross-functional teams This role is hybrid and requires 3 days a week in office . Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. Five9 is committed to providing reasonable accommodations for qualified individuals with disabilities throughout the application and interview process. If you need assistance or an accommodation due to a disability, please contact us at accommodations@five9.com to request an accommodation. Requests will be handled confidentially and in accordance with applicable law. View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal . Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. About Five9 Five9 is a leading provider of cloud software for the enterprise contact center market, bringing the power of the cloud to thousands of customers and facilitating more than three billion customer interactions annually. Since 2001, Five9 has led the cloud revolution in contact centers, helping organizations transition from legacy premise-based solutions to the cloud. Five9 provides businesses with cloud contact center software that is reliable, secure, compliant and scalable, which is designed to create exceptional customer experiences, increase agent productivity and deliver tangible business results. Role Overview To complement our rapid growth, we are actively sourcing for a Network Engineer to operate in a 24/7 Software-as-a-Service (SaaS) environment maintaining IP Networking components in a production setting. In this role you will: Design, engineer, and oversee highly scalable CI/CD pipelines for automated testing, digital-twin dry-running, and zero-downtime deployment of configurations across massive physical and virtual network fabrics. Champion the "Network-as-Code" paradigm, establishing enterprise-wide GitOps workflows and enforcing source control (Git) as the absolute single source of truth for all network state, policy, and infrastructure design. Drive the strategic vision for network automation, designing complex, reusable code frameworks and Playbooks to permanently eliminate manual configuration and operational "toil" at a global scale. Design and optimize massive-scale software-defined networks (SDN) and container networking interfaces (CNIs) supporting ultra-high-throughput, multi-region cloud and bare-metal environments. Serve as the ultimate technical authority (SME / Tier 4) for complex network, routing, and overlay issues, rapidly deciphering and resolving the most difficult challenges across physical underlays and software-defined layers. Design and implement next-generation telemetry, monitoring, and alerting-as-code platforms, leveraging advanced heuristics for proactive auto-remediation of performance, security, and capacity issues. Key Responsibilities Partner at a strategic level with Enterprise Designers, SRE leaders, and Platform teams to build and implement highly resilient, secure, and multi-tenant-isolated network infrastructure. Establish coding standards and write/review sophisticated Infrastructure-as-Code (IaC) using Ansible, Terraform, Helm, Python, and Bash. Lead the engineering, deployment, and optimization of modern overlay and container networking solutions, particularly VXLAN, OVN (Open Virtual Network), and Project Calico. Design the automation of complex security and traffic management policies across enterprise-grade firewalls (Palo Alto/Fortinet) and load balancers (F5 BIG-IP/Cloudflare/Octavia). Embed "Security-as-Code" directly into CI/CD pipelines, engineering automated validation gates for security groups, ACLs, and firewall rules prior to production pushes. Engineer robust, automated network validation suites to continuously verify network health, state, and complex routing tables (BGP, OSPF) pre- and post-deployment. Drive the adoption of code-based infrastructure definitions and dynamic, living technical documentation (e.g., NetBox, Git Markdown), setting the standard for documentation across the engineering organization. Qualifications & Skills 5+ years of progressive experience in Network Engineering, DevOps, or SRE roles, with a deeply established focus on large-scale network design, automation, and Infrastructure-as-Code (IaC). Expert-level proficiency in engineering complex network automation tooling utilizing Ansible, Terraform, and Python (including deep experience with network-specific libraries like Netmiko, Nornir, or NAPALM). Deep design and operational expertise with massive-scale software-defined networks (SDN) and overlays, specifically VXLAN, OVN, and Project Calico. Advanced mastery of Kubernetes networking designs (CNIs, Ingress controllers, Service Mesh, Kube-Proxy behaviors) at an enterprise scale. Extensive, expert-level experience engineering and automating enterprise edge, routing, and security fabrics, including Cisco Nexus (9k/7k/5k/2k), Arista, Versa SD-WAN, and firewalls (Palo Alto and Fortinet). Authoritative knowledge of API-driven application delivery and load balancing across monolithic and cloud-native stacks (e.g., F5 BIG-IP AS3, Cloudflare APIs, Octavia LBaaS). Deep Linux internals and networking expertise, including advanced knowledge of Linux network namespaces, virtual interfaces, eBPF/iptables, and kernel-level routing. CCIE-level (or equivalent) mastery of core routing protocols (BGP, OSPF, MPLS, EVPN) and a comprehensive understanding of how virtual/container overlay networks map to physical underlays. Extensive experience designing and scaling CI/CD platforms (e.g., GitLab CI, Jenkins, GitHub Actions) and implementing test-driven development (TDD) for infrastructure changes. Unparalleled troubleshooting capabilities utilizing advanced packet analysis (tcpdump/Wireshark), NetFlow, and log aggregation platforms to trace asymmetric routing and microburst traffic across hybrid fabrics. Proven track record of technical leadership, including mentoring mid-level engineers, leading design review boards, and driving cross-functional engineering initiatives. Deep telecommunications background, specifically VoIP, RTP, SIP peering/trunking, and Session Border Controllers (SBC), is highly advantageous. Exceptional verbal and written communication skills, with the ability to translate complex technical concepts to executive stakeholders while fostering a collaborative, DevOps-oriented engineering culture. Diversity & Inclusion Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. This role is hybrid and requires 3 days a week in office . Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. Five9 is committed to providing reasonable accommodations for qualified individuals with disabilities throughout the application and interview process. If you need assistance or an accommodation due to a disability, please contact us at accommodations@five9.com to request an accommodation. Requests will be handled confidentially and in accordance with applicable law. View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal . Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. AI Engineering Manager ABOUT THE ROLE Five9 is a leading provider of cloud contact center software, bringing the power of Five9 AI and automation to organizations worldwide. The Enterprise-AI Team drives Five9's internal adoption of AI — turning emerging capability into real business outcomes across the company. The AI Engineering Manager leads the team that builds and operates Five9's internal AI solutions — the AI Automation Engineers who build solutions and automations, and the AI Platform Engineers who build and run the platform underneath them. This is a hands-on role: at least 30% of your time is spent building, reviewing, and unblocking work alongside the team, primarily in Claude — Claude Code and the Claude API / agent tooling. The rest is people leadership — managing performance, mentoring engineers, and guiding growth, while balancing delivery against the team's long-term technical health. You partner closely with the solutions architect on technical design, the program manager on roadmap and prioritization, and the enablement lead on adoption, so what the team builds ships, holds up in production, and reaches the people who need it. HOW YOU CONTRIBUTE Team leadership & people management — Lead, mentor, and develop the AI Automation and AI Platform Engineers; manage performance, run regular 1:1s, and guide career growth. Hands-on project work (30%+ of your time) — Personally build, review, and ship real project work alongside the team — solutions, automations, and platform tasks — primarily in Claude (Claude Code, the Claude API, and agent / MCP tooling). Technical excellence & standards — Drive best practices in Claude-based development, code review, and design quality; hold the team — and your own work — to the architect's standards. Delivery & roadmap execution — Partner with the program manager and business stakeholders to plan and sequence delivery; balance short-term commitments against long-term technical health. Cross-functional partnership — Work closely with the solutions architect on technical design, and with platform, security, and other engineering teams to keep the team's output integrated and secure. Quality, security & standards adherence — Ensure everything the team ships — including your own work — meets security, data-classification, and responsible-AI requirements. Coaching & growth — Support the team's professional growth through coaching, training, and knowledge-sharing; create real opportunities for skill development. Troubleshooting & unblocking — Get hands-on with complex technical problems — in Claude-driven builds and platform issues alike — and drive them to resolution. Continuous currency — Stay current on Claude and the broader AI-augmented engineering landscape so your own craft, and the team's, keep pace. SKILLS, COMPETENCIES & QUALIFICATIONS — REQUIRED Bachelor's or Master's degree in Computer Science, Engineering, or a related field. 8+ years in software or AI engineering, with 2+ years in a leadership role — including a track record of personally shipping production work, not only overseeing it. Demonstrated hands-on proficiency building with Claude — Claude Code and/or the Claude API / agent tooling — in a you-direct / AI-executes / you-verify working style. Hands-on cloud-native delivery fundamentals: Git, automated testing, CI / CD, and cloud deployment (Google Cloud preferred). Working fluency with the platform layer the team depends on: infrastructure-as-code (Terraform), containers / orchestration, and MLOps / LLMOps basics (model / agent serving, evaluation, versioning). Solid understanding of integration patterns, APIs, and data-management practices in cloud-deployed systems. Excellent communication skills, a strategic mindset, and the ability to collaborate across technical and business teams in a fast-paced environment. SKILLS, COMPETENCIES & QUALIFICATIONS — PREFERRED Experience with Google Cloud services and infrastructure-as-code / CI-CD delivery pipelines. Experience personally building AI / LLM-powered features, agents, or automations in Claude — not only directing others' builds. Contact center / CX technology exposure (Five9 or comparable). Experience partnering with product, design, or business stakeholders to shape a delivery roadmap. Prior experience standing up or scaling an engineering team's practices from an early stage. WHERE THIS ROLE SITS Primary focus: hands-on leadership of the AI engineering / builder team — At least 30% hands-on in the team's own project work — building and unblocking in Claude alongside the AI Automation Engineers and AI Platform Engineers — plus people leadership and delivery execution for both. Owns hands-on delivery, team leadership & people growth — Combines direct, in-Claude project execution with day-to-day people leadership for the builder team — coaching, performance management, and career growth. Reports to the Sr. Director; partners with the program manager — Coordinates roadmap and prioritization with the program manager; reports team outcomes up to the Sr. Director, Enterprise AI. KEY RELATIONSHIPS Direct reports: the AI Automation Engineer(s) and AI Platform Engineer(s). Reports to: Sr. Director, Enterprise AI. Key partners: the Principal AI Solutions Architect (technical design) · the AI Program Manager (roadmap and prioritization) · the AI Enablement & Learning Lead (adoption) · information security and enterprise architecture. At least 30% of this role is hands-on in the team's own Claude-based project work, not purely oversight. This role is hybrid and requires 3 days a week in office . Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. Five9 is committed to providing reasonable accommodations for qualified individuals with disabilities throughout the application and interview process. If you need assistance or an accommodation due to a disability, please contact us at accommodations@five9.com to request an accommodation. Requests will be handled confidentially and in accordance with applicable law. View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal . Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. Senior Software Engineer in AI - Java Spring, backend Five9 is a leading provider of cloud software for the enterprise contact center market, bringing the power of the cloud to thousands of customers and facilitating more than three billion customer interactions annually. Five9 has led the cloud revolution in contact centers, helping organizations transition from legacy premise-based solutions to the cloud. The cloud contact center market has become the hot space for innovation in real-time communications, and is the tip of the spear for the application of Artificial Intelligence. Five9 has led the charge with its Genius AI platform. Five9 offers a high-energy environment with lots of room for personal and professional growth. Our innovative AI team is seeking a talented and experienced Senior Software Engineer to join our Voice of Customer (VOC) team. AI experience is required for this role - you will work hands-on with AI technologies from vendors like Azure, OpenAI, Google, Databricks, IBM, and Amazon, and continue to build on some of the hottest skills on the market. An ideal candidate for us is an experienced engineer who is passionate about building high performance web platforms and applications, a brilliant problem solver and a creative self-starter. Voice of Customer (VOC) is Five9’s AI-powered customer insights product. Every day, contact centers handle enormous volumes of voice and chat conversations that hold the clearest signal about what customers actually want - and almost none of it gets read. VOC applies AI to those conversations at scale to surface why customers are reaching out, how those reasons cluster and shift over time, and where the business should act. The result is a set of insights and analytics that CX and operations leaders use to make decisions, with the ability to trace any insight back to the conversations behind it. Key Responsibilities: Be part of an agile team developing a scalable, highly available application platform using modern PaaS platforms such as GCP. Utilizing Java Spring Framework and Spring Boot for creation of highly scalable, robust microservices. Reactive programming is desirable but not required. Build and scale the backend services and data pipelines that turn large volumes of customer conversations into insights. Integrate AI and LLM services into those pipelines, and make sure the insights they produce are accurate and traceable. Understand how to leverage PaaS components, such as message buses, cloud functions (lambdas), and noSQL databases when developing software in order to achieve scalability, reliability, and operability. Participate and contribute to requirements analysis and feature grooming. Document and communicate clearly architecture and implementation solutions. Have ownership of your code in production, including on-call, troubleshooting. Key Skills: 5+ years software development experience (mandatory). Highly proficient in Java - Spring Framework, Spring Boot, and REST API design. Reactive programming (rxjava or similar) is desirable but not required. Hands-on experience building AI-powered products or services, including practical LLM integration - prompt design, structured output, evaluation, and managing cost and latency. Hands-on experience designing and implementing scalable, event-driven microservices. Experience with PaaS hosted relational and no-SQL databases (mySQL, BigQuery, DataStore, Redis, etc). Experience with public cloud technologies and tools - Kubernetes, noSQL databases, message buses. Experience with large-scale data processing and analytics is a plus. Familiarity with vibe coding using different AI tools like Claude Code. Experience in developing automated test cases with modern tools such as JUnit. Experience in operational code ownership - on-call, troubleshooting, uptime. Experience in applying design patterns and separating concerns in a distributed system. Solid understanding of security best practices for protecting applications and data. Must have experience working within an Agile/Scrum team. Positive, self-motivated and enthusiastic attitude with a strong sense of ownership. Strong pro-active communication skills, both verbal and written. AI skills in speech recognition and natural language processing are a plus but not required. Experience in contact center software is a plus but not required. This role is hybrid and requires 3 days a week in office . Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. Five9 is committed to providing reasonable accommodations for qualified individuals with disabilities throughout the application and interview process. If you need assistance or an accommodation due to a disability, please contact us at accommodations@five9.com to request an accommodation. Requests will be handled confidentially and in accordance with applicable law. View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal . Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. Our triage pipeline is heavily AI-enriched, so analysts spend little of their day working alerts directly. The role is the work around triage: incident response, detection engineering, response automation, threat intelligence, and building the AI tooling the pipeline runs on. It is closer to a security engineering role than to a conventional SOC analyst role, and we expect you to write code. This position requires the person to work Pacific Time hours (9:00AM - 5:00PM). Responsibilities Incident response. Own incidents end to end: scoping, containment, forensics, write-up, and remediation follow-through. Detection engineering. Write, tune, test, and retire detections. Detection content is version controlled, reviewed, and measured on outcomes rather than alert volume. IR automation. Build playbooks, integrations, and workflows that remove repeated manual steps from the response process. This is a large part of the role. Threat intelligence. Track activity relevant to our environment and convert it into detections, hunts, and hardening work. Threat hunting. Be a contributor to our hypothesis-led threat hunting initiatives. AI-assisted development. Build and improve the agents, prompts, and enrichment logic behind the triage pipeline. Alert triage. A limited amount: escalations the pipeline surfaces, plus the feedback that improves it. Requirements Hands-on security operations experience, including incidents you can walk through in detail. Proficiency in at least one scripting language (Python or equivalent) and a preference for solving recurring problems with code. Working knowledge of detection logic, log pipelines, and modern telemetry sources: EDR, identity, cloud, network, and SaaS. Ability to take an ambiguous problem, define what done looks like, build it. Clear written communication: incident timelines, design notes, and postmortems. Preferred GCP and/or AWS experience, including cloud logging, IAM, and cloud-specific failure modes. Low-code automation platforms such as Tines or n8n, and judgment about when a workflow should become production code. Agent programming and prompt engineering, specifically LLM tooling reliable enough for operational use. Experience with AI-enriched detection or triage pipelines. How the team works You will be given problems rather than tickets, and you are responsible for the solution and the reasoning behind it. There is no micromanagement and minimal handholding. This suits people who self-direct and are candid when something is not working. It does not suit people who need an assigned queue. Work Location: This role is fully remote for candidates who reside outside the 30 mile radius of one of our offices. For candidates who reside within a 30 mile radius of one of our offices, this role is Hybrid and would require 3 days a week (T, W, TH) in office. As part of our continued commitment to diversity, equity, and inclusion, Five9 supports pay transparency during the entire recruitment process. Actual compensation packages are based on several factors that are unique to each candidate including, but not limited to: skill set, depth of experience, certifications, and specific work location. The range displayed reflects the minimum and maximum target for new hire salaries for the job across the United States. Your recruiter can share more about the specific compensation package during your hiring process. Additionally, the total compensation package for this position may also include an annual performance bonus, stock, and/or other applicable incentive compensation plans. Our total reward package also includes: Health, dental, and vision coverage, beginning on the first day of employment. Five9 covers 100% of the employee portion of the health, dental and vision coverage and shares a high portion of the dependent cost. We also offer Short & Long-Term Disability, Basic Life Insurance, and a 401k saving plan with employer matching. Access to an innovative mental health support platform that offers personalized care and resources in areas such as: therapy, coaching and self-guided mindfulness exercises for all covered employees and their covered dependents. Generous employee stock purchase plan. Paid Time Off, Company paid holidays, paid volunteer hours and 12 weeks paid parental leave. All compensation and benefits are subject to the requirements and restrictions set forth in the applicable plan documents and any written agreements between the parties. The US base salary range for this role is below. $66,300 — $174,700 USD Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer. Five9 is committed to providing reasonable accommodations for qualified individuals with disabilities throughout the application and interview process. If you need assistance or an accommodation due to a disability, please contact us at accommodations@five9.com to request an accommodation. Requests will be handled confidentially and in accordance with applicable law. View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal . Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.