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About ARQ ARQ is one of the fastest-growing fintechs in the world. Our mission is to redefine how people interact with money across borders, building the infrastructure to move value seamlessly. We’re still early in our journey, which means every person who joins shapes the future of our product, culture, and growth. If you’re excited by big challenges, global impact, and the chance to grow fast with a world-class team, ARQ is the place to do it. What we're looking for As a Backend Engineer, you’ll design, develop, and maintain scalable, secure, and high-performing backend systems that power our innovative products. You’ll collaborate with a talented team to create solutions that drive financial inclusion and transform the way people manage their money. What you'll be doing The work will focus on greenfield development and improvement of existing systems Projects will include building REST APIs, engineering microservices and evolving a number of systems that our business depends on (e.g. card payments, treasury management, transactions booking, crypto liquidity) Our technology stack is based predominantly on Java 25 on the backend with Postgres database We rely on Spring Boot for quick and quality delivery We have a pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD and continuous integration & delivery What you'll need Demonstrable experience in Backend development, with fluency in Java Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines Quick learner with an ambitious and results driven personality, with excellent communication skills (english fluency, verbal and written) Track record of building complex products that millions of people use in hypergrowth startups Benefits Competitive salary and benefits Stock options, so you own part of what you build Discretionary performance bonus The latest tools and technology A world-class team that will challenge and grow your skills The opportunity to help build the best fintech app in Latin America Office Policy: 3-4 days a week in-office

About ARQ ARQ is one of the fastest-growing fintechs in the world. Our mission is to redefine how people interact with money across borders, building the infrastructure to move value seamlessly. We’re still early in our journey, which means every person who joins shapes the future of our product, culture, and growth. If you’re excited by big challenges, global impact, and the chance to grow fast with a world-class team, ARQ is the place to do it. What we're looking for As a Backend Engineer, you’ll design, develop, and maintain scalable, secure, and high-performing backend systems that power our innovative products. You’ll collaborate with a talented team to create solutions that drive financial inclusion and transform the way people manage their money. What you'll be doing The work will focus on greenfield development and improvement of existing systems Projects will include building REST APIs, engineering microservices and evolving a number of systems that our business depends on (e.g. card payments, treasury management, transactions booking, crypto liquidity) Our technology stack is based predominantly on Java 25 on the backend with Postgres database We rely on Spring Boot for quick and quality delivery We have a pragmatic approach to develop our business logic, focusing on clean code, with emphasis on maintainability and fast turnaround with TDD, DDD and continuous integration & delivery What you'll need Demonstrable experience in Backend development, with fluency in Java Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering / Science disciplines Quick learner with an ambitious and results driven personality, with excellent communication skills (english fluency, verbal and written) Track record of building complex products that millions of people use in hypergrowth startups Benefits Competitive salary Sign-on stock options bonus, so you become part of the success of the company Discretionary performance bonus (stock options) Paid annual leave Own the development process that will face on the customer's impact Latest technology to work with Strong team that will help you improve your skills

What We're Looking For You'll be ARQ's first Security Engineer based in Brazil – it's the chance to lay the foundation for how we do security in the region and shape how that function grows from here. You'll work closely with our global security team but have real autonomy in deciding what "good" looks like locally, from day one. We're looking for someone who enjoys a multidisciplinary role. Security at ARQ spans Application Security, Security Operations, and Governance/Risk/Compliance, and we need someone comfortable moving across at least two of these three areas – because in a founding role, there's no one else to hand off the parts that don't fit your specialty. What you'll do Drive the application security roadmap: threat modelling standards, secure code review practices, API security testing strategy, and security pipeline architecture Define the company's approach to securing AI/agentic workflows – setting guardrails for prompts, destructive actions, and data exposure, and advising other teams building with LLMs/MCP servers Set the technical direction for detection engineering, alert pipelines, and automated response across the security stack (Datadog SIEM, CrowdStrike, Cloudflare), and raise the bar on how the team designs and reviews detections Own incident response readiness at a program level: design IR playbooks, lead tabletop exercises, and act as technical lead during major incidents Set the standard and approach for cloud security assessments across AWS and Kubernetes, reviewing findings from other engineers and tackling the most complex environments directly Own the vendor security assessment framework itself: continuously improving the due diligence process and handling the highest-risk vendor reviews Act as a technical mentor to mid and senior engineers, reviewing their detection logic, assessments, and playbooks without formal management responsibilities What you'll need 7+ years in information security, including demonstrated experience building or substantially maturing a security function or program from the ground up Deep, hands-on expertise in cloud infrastructure security (AWS, Kubernetes), able to architect controls Proven experience driving application security programs: threat modelling frameworks, secure code review standards, CI/CD pipeline hardening, and API security testing strategy Demonstrated ability to define practical security guardrails for AI/agentic tooling – you understand the risks of LLM integrations, MCP servers, and automated workflows at an architectural level Strong detection engineering background – you've designed detection strategy and mentored others in writing rules Deep experience with endpoint security tooling (EDR/XDR) and identity & access management architecture in a SaaS-heavy environment (Google Workspace, Okta/Cloudflare Access, SSO/SCIM) Experience designing or significantly evolving a vendor security assessment/third-party due diligence program Excellent written and verbal communication; comfortable representing security decisions to leadership and cross-functional stakeholders Business fluent in English Benefits Competitive salary and benefits Stock options, so you own part of what you build Discretionary performance bonus The latest tools and technology A world-class team that will challenge and grow your skills The opportunity to help build the best fintech app in Latin America Office Policy: 3-4 days a week in-office

What We're Looking For You'll be ARQ's first Security Engineer based in Brazil – it's the chance to lay the foundation for how we do security in the region and shape how that function grows from here. You'll work closely with our global security team but have real autonomy in deciding what "good" looks like locally, from day one. We're looking for someone who enjoys a multidisciplinary role. Security at ARQ spans Application Security, Security Operations, and Governance/Risk/Compliance, and we need someone comfortable moving across at least two of these three areas – because in a founding role, there's no one else to hand off the parts that don't fit your specialty. What you'll do Support application security work: threat modelling sessions, secure code review, API security testing, and CI/CD pipeline checks Help review and monitor AI/agentic workflows for prompt risks, unsafe automated actions, and data exposure Build and maintain SIEM detection rules, alert pipelines, and response playbooks (Datadog SIEM, CrowdStrike, Cloudflare), owning detection coverage for a defined set of systems end-to-end Support incident response: triage alerts, execute IR playbooks, and help run tabletop exercises Conduct cloud security assessments across AWS and Kubernetes environments under the guidance of senior team members Execute vendor security assessments using the established due diligence framework, owning the review process for a portion of the vendor pipeline What you'll need 2–4 years in information security or a closely related technical role (security operations, cloud/infra engineering with a security focus, or similar) Working experience with at least one cloud environment (AWS preferred) and familiarity with Kubernetes fundamentals Basic familiarity with application security concepts: threat modelling, secure code review, or API security testing Curiosity about AI/agentic tooling risks (LLM integrations, MCP servers, automated workflows) – prior hands-on experience is a plus, not required Exposure to SIEM platforms and an interest in detection engineering – you've written or tuned at least a few detection rules Strong written and verbal communication in English Benefits Competitive salary and benefits Stock options, so you own part of what you build Discretionary performance bonus The latest tools and technology A world-class team that will challenge and grow your skills The opportunity to help build the best fintech app in Latin America Office Policy: 3-4 days a week in-office

What We're Looking For You'll be ARQ's first Security Engineer based in Brazil – it's the chance to lay the foundation for how we do security in the region and shape how that function grows from here. You'll work closely with our global security team but have real autonomy in deciding what "good" looks like locally, from day one. We're looking for someone who enjoys a multidisciplinary role. Security at ARQ spans Application Security, Security Operations, and Governance/Risk/Compliance, and we need someone comfortable moving across at least two of these three areas – because in a founding role, there's no one else to hand off the parts that don't fit your specialty. What you'll do Drive application security initiatives: threat modelling, secure code review support, API testing, and security pipeline improvements Assess and secure AI/agentic workflows across the company — reviewing prompts, preventing destructive actions, and controlling data exposure Build and improve SIEM detection rules, alert pipelines, and automated response playbooks (Datadog SIEM, CrowdStrike, Cloudflare) Contribute to incident response readiness, including IR playbooks, tabletop exercises, and forensic procedures Conduct cloud security assessments across AWS and Kubernetes environments Establish and run the vendor security assessment process — building a scalable due diligence framework for third-party onboarding What you'll need 4–7 years in information security, ideally having built or significantly shaped the security function at a startup or high-growth company - you've been the person who sets things up, not just maintains them Hands-on experience with cloud infrastructure security (AWS, Kubernetes) Familiarity with application security practices: threat modelling, secure code review, CI/CD pipeline hardening, and API security testing Ability to assess and secure emerging AI/agentic tooling - you understand the risks of LLM integrations, MCP servers, and automated workflows, and can define practical guardrails Working knowledge of SIEM platforms and detection engineering - you've written detection rules Experience with endpoint security tooling (EDR/XDR) and identity & access management in a SaaS-heavy environment (Google Workspace, Okta/Cloudflare Access, SSO/SCIM) Experience running or contributing to vendor security assessments and third-party due diligence Strong written and verbal communication in English Benefits Competitive salary and benefits Stock options, so you own part of what you build Discretionary performance bonus The latest tools and technology A world-class team that will challenge and grow your skills The opportunity to help build the best fintech app in Latin America Office Policy: 3-4 days a week in-office