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Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in! At Duolingo, you’ll join a team that cares about finding innovative solutions to complex technical problems , running countless experiments (300+ at a time!) with our massive user base to make data-driven decisions, and educating our users and employees alike. You’ll have limitless learning opportunities, mentorship and collaboration with world-class minds, and a variety of projects with large scopes — while doing work that’s both fun and meaningful. Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world. About the role... As the manager and team lead of the new AI Tooling and Ecosystem Team, you will lead the development of the suite of tools and services that power Duolingo's use of AI in the product. You'll lead a team of 5-6 engineers to design systems for managing datasets, evaluating the performance of AI models, and building AI workflows. You will help shape how Duolingo builds features using AI, enabling teams to easily define quality metrics, combine human and AI feedback, and compare model performance. We're looking for an engineering manager who has experience building AI products or infrastructure and is excited to play a central role in shaping the future of AI at Duolingo! 🧠 You will... Drive development of tools and services that empower Duolingo's product teams to easily and effectively build AI-powered features and workflows. Manage our shared systems and workflows for AI-related datasets, prompts, and evaluations (both human and LLM-as-a-judge). Build processes that allow teams to define success criteria for their AI use-case, identify the most appropriate models, and construct feedback loops for prompt optimization. Streamline common AI development flows so that teams with varying levels of AI expertise can build out AI systems quickly. Collaborate closely with the AI Core Infrastructure Team to ensure that AI workflows are reliable, measurable, and cost efficient. Partner with AI, Product, Data Science, and Platform leaders to build out new AI tooling that supports common use-cases. Own multi‑quarter roadmaps and cross‑functional alignment that increase AI feature velocity and measurable product impact across Duolingo. ✅ You have... Experience leading, managing, and building a team of software and/or AI engineers, with demonstrated ability to hire, develop, and retain talent. A track record of building AI-related infrastructure or user-facing products powered by AI. Familiarity with AI evaluation methods, especially approaches that combine human and LLM-as-a-judge evaluations. Strong cross‑functional leadership and communication skills; proven ability to align AI, product, data science, and platform partners on strategy and execution. Comfort leading through ambiguity and shaping new ways of working in a fast‑evolving AI landscape. A Bachelor's degree in Computer Science or a related technical field The ability to work from or relocate to Pittsburgh, PA or New York, NY. ⭐ Exceptional candidates will have... Hands‑on experience building evaluation systems and human‑in‑the‑loop data pipelines at scale. A track record of developing internal tools on a platform or infrastructure team, providing tools and services via easy-to-use APIs, MCPs, and web GUIs. Experience navigating build vs. buy decisions and shaping long-term roadmaps based on the needs of internal customers. The offered salary is dependent upon several factors, including work experience, skills, and internal peer comparisons. The posted range is subject to change in the future. For this role, base salary is supplemented by equity compensation. We encourage you to talk with your recruiter for more information related to compensation for this role! Salary Range: $204,000 — $306,000 USD Benefits: Take a peek at how we care for our employees' holistic well-being with our benefits here . Job Alerts: Sign up for job alerts here . Accommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com . Equal Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. Fraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information. By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice .

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in! At Duolingo, you’ll join a team that cares about finding innovative solutions to complex technical problems , running countless experiments (300+ at a time!) with our massive user base to make data-driven decisions, and educating our users and employees alike. You’ll have limitless learning opportunities, mentorship and collaboration with world-class minds, and a variety of projects with large scopes — while doing work that’s both fun and meaningful. Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world. About the role... As the manager and team lead of the new AI Tooling and Ecosystem Team, you will lead the development of the suite of tools and services that power Duolingo's use of AI in the product. You'll lead a team of 5-6 engineers to design systems for managing datasets, evaluating the performance of AI models, and building AI workflows. You will help shape how Duolingo builds features using AI, enabling teams to easily define quality metrics, combine human and AI feedback, and compare model performance. We're looking for an engineering manager who has experience building AI products or infrastructure and is excited to play a central role in shaping the future of AI at Duolingo! 🧠 You will... Drive development of tools and services that empower Duolingo's product teams to easily and effectively build AI-powered features and workflows. Manage our shared systems and workflows for AI-related datasets, prompts, and evaluations (both human and LLM-as-a-judge). Build processes that allow teams to define success criteria for their AI use-case, identify the most appropriate models, and construct feedback loops for prompt optimization. Streamline common AI development flows so that teams with varying levels of AI expertise can build out AI systems quickly. Collaborate closely with the AI Core Infrastructure Team to ensure that AI workflows are reliable, measurable, and cost efficient. Partner with AI, Product, Data Science, and Platform leaders to build out new AI tooling that supports common use-cases. Own multi‑quarter roadmaps and cross‑functional alignment that increase AI feature velocity and measurable product impact across Duolingo. ✅ You have... Experience leading, managing, and building a team of software and/or AI engineers, with demonstrated ability to hire, develop, and retain talent. A track record of building AI-related infrastructure or user-facing products powered by AI. Familiarity with AI evaluation methods, especially approaches that combine human and LLM-as-a-judge evaluations. Strong cross‑functional leadership and communication skills; proven ability to align AI, product, data science, and platform partners on strategy and execution. Comfort leading through ambiguity and shaping new ways of working in a fast‑evolving AI landscape. A Bachelor's degree in Computer Science or a related technical field. The ability to work from or relocate to Pittsburgh, PA or New York, NY. ⭐ Exceptional candidates will have... Hands‑on experience building evaluation systems and human‑in‑the‑loop data pipelines at scale. A track record of developing internal tools on a platform or infrastructure team, providing tools and services via easy-to-use APIs, MCPs, and web GUIs. Experience navigating build vs. buy decisions and shaping long-term roadmaps based on the needs of internal customers. The offered salary is dependent upon several factors, including work experience, skills, and internal peer comparisons. The posted range is subject to change in the future. For this role, base salary is supplemented by equity compensation. We encourage you to talk with your recruiter for more information related to compensation for this role! Salary Range: $204,000 — $306,000 USD Benefits: Take a peek at how we care for our employees' holistic well-being with our benefits here . Job Alerts: Sign up for job alerts here . Accommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com . Equal Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. Fraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information. By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice .

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in! At Duolingo, you’ll join a team that cares about educating our users, experimenting with big ideas, making fact-based decisions, and finding innovative solutions to complex problems. You’ll have limitless learning opportunities and daily collaborations with world-class minds — while doing work that’s both meaningful and fun. Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world. Read our blog to learn more. 🧠 You will... Work within a small group to complete a challenging, real-world software engineering project. Develop your technical skills through engineering talks, training, and guest speakers. Attend career-building skill workshops. Receive coaching and mentorship from a Duolingo Software Engineer. Build lasting relationships with others who share a passion for making the best education universally available. ✅ You have... Undergraduate student currently pursuing a Bachelor’s degree in Computer Science or a related technical field. Graduating in December 2028 - August 2029 Completion of at least two college-level computer science courses (please upload your official or unofficial transcript). Programming experience in one or more of the following languages: Java, Python, Kotlin or Swift. Dedication to our mission of accessible education 10-week consecutive availability from June 14, 2027 - Aug 20th, 2027 Ability to relocate to Pittsburgh, PA Deadline to apply: September 30, 2026 ⭐ Exceptional candidates will have... A GPA of 3.5+ A Duolingo streak ❤️ Why you'll love working here... Language learning opportunities Catered in-house lunches and breakfast Company-wide Hackathon PTO and company holidays Frequent company-wide dinners, monthly celebrations, social clubs, and so much more! Connect with your recruiter on the benefits for interns at Duolingo! Hourly Range for this internship is: $47 — $49 USD Benefits: Take a peek at how we care for our employees' holistic well-being with our benefits here . Job Alerts: Sign up for job alerts here . Accommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com . Equal Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. Fraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information. By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice .

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in! At Duolingo, you’ll join a team that cares about finding innovative solutions to complex technical problems , running countless experiments (300+ at a time!) with our massive user base to make data-driven decisions, and educating our users and employees alike. You’ll have limitless learning opportunities, mentorship and collaboration with world-class minds, and a variety of projects with large scopes — while doing work that’s both fun and meaningful. Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world. About the role... As a Platform Engineer on the Compute team, you’ll improve how engineers build and run services, helping ensure our compute platform is reliable at scale for our learners and fellow Duo engineers. The Compute team builds and operates the core compute platform that powers our applications. We build paved roads (self-service platform primitives, templates, and tooling) and we operate them so product engineers can focus on shipping features with confidence. 🧠 You will... Build and operate core compute primitives that power production workloads based on Kubernetes, across different regions and cloud providers. Improve the delivery pipeline from commit to production by evolving our GitOps and deployment patterns, making rollouts safer and faster. Raise the operational bar: define SLOs, build dashboards/alerts, write runbooks, and participate in on-call/incident response to keep the platform dependable. Enable effective self-service by turning platform capabilities into reusable abstractions. ✅ You have... Strong problem-solving skills and experience delivering and shipping pragmatic solutions in production environments. Experience with distributed systems fundamentals (networking, service-to-service communication, failure modes, caching/storage concepts). Experience working on production systems (through industry roles, internships, or substantial open-source work). Experience with one or more CI/CD tools (Jenkins, Argo CD, GitHub Actions) and infrastructure management tools (Terraform, CloudFormation) Clear written and verbal communication skills—comfortable writing docs/runbooks and collaborating across teams. Functional knowledge of Linux system administration and automation ⭐ Exceptional candidates will have... A Bachelor’s degree in Computer Science, related technical field, or equivalent practical experience Experience managing a production infrastructure on AWS, Google Cloud, Alibaba Cloud, or Azure. Exposure to multi-cluster or multi-region architectures and the operational patterns that make them reliable. Experience with service mesh / zero-trust networking patterns (e.g., Istio mTLS, traffic management, authorization policies). The offered salary is dependent upon several factors, including work experience, skills, and internal peer comparisons. The posted range is subject to change in the future. For this role, base salary is supplemented by equity compensation. We encourage you to talk with your recruiter for more information related to compensation for this role! Salary Range: $153,000 — $207,000 USD Benefits: Take a peek at how we care for our employees' holistic well-being with our benefits here . Job Alerts: Sign up for job alerts here . Accommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com . Equal Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. Fraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information. By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice .

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in! At Duolingo, you’ll join a team that cares about educating our users, experimenting with big ideas, making fact-based decisions, and finding innovative solutions to complex problems. You’ll have limitless learning opportunities and daily collaborations with world-class minds — while doing work that’s both meaningful and fun. Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world. Read our blog to learn more. 🧠 What you'll do... Contribute to full-stack software projects by developing, testing, and maintaining features and services. Develop, release, and maintain services and/or infrastructure Lead individual project priorities, deadlines, and deliverables Contribute to code reviews and collaborate across teams to ensure quality and scalability ✅ What we're looking for... Graduating December 2027 - August 2028 Pursuing a B.S. or M.S. degree in Computer Science or a related technical field (e.g. math, physics or data science) Dedication to our mission of universally available education Programming experience in one or more of the following languages: Java, Python, Kotlin, or Swift. 12 weeks of consecutive availability May 24, 2027 - August 13, 2027 June 14, 2027 - September 3, 2027 Deadline to apply: September 30, 2026 ⭐ What you can expect... Close support from your mentor and your team Working on features and projects that will have real impact for our learners and internal users A fun, mission-driven environment, where you’ll have lots of opportunities to grow as an engineer and make meaningful connections with your colleagues 👀 Past projects include... Developing a GPT-4 chat interface for one of our internal tools to streamline content creation Integrating our A/B testing framework with our observability stack to flag experiments that introduce errors Spanish audio lessons to improve listening comprehension Crafting new lessons to teach Coordinates in our Math course Porting large features to new platforms (iOS, Android, web) Dashboards and tooling for site reliability insights Crafting new microservices from scratch ❤️ Why you'll love working here... Language learning opportunities Catered in-house lunches, and breakfast and dinner options Company-wide Hackathon PTO and company holidays Frequent company-wide dinners, monthly celebrations, social clubs, and so much more! Connect with your recruiter on the benefits for interns at Duolingo! Hourly Range for this internship is: $54 — $56 USD Benefits: Take a peek at how we care for our employees' holistic well-being with our benefits here . Job Alerts: Sign up for job alerts here . Accommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com . Equal Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. Fraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information. By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice .

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in! At Duolingo, you’ll join a team that cares about educating our users, experimenting with big ideas, making fact-based decisions, and finding innovative solutions to complex problems. You’ll have limitless learning opportunities and daily collaborations with world-class minds — while doing work that’s both meaningful and fun. Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world. Read our blog to learn more. 🧠 What you'll do... Contribute to full-stack software projects by developing, testing, and maintaining features and services. Develop, release, and maintain services and/or infrastructure Lead individual project priorities, deadlines, and deliverables Contribute to code reviews and collaborate across teams to ensure quality and scalability ✅ What we're looking for... Graduating December 2027 - August 2028 Pursuing a B.S. or M.S. degree in Computer Science or a related technical field (e.g. math, physics or data science) Dedication to our mission of universally available education Programming experience in one or more of the following languages: Java, Python, Kotlin, or Swift. 12 weeks of consecutive availability May 24, 2027 - August 13, 2027 June 14, 2027 - September 3, 2027 Deadline to apply: September 30, 2026 ⭐ What you can expect... Close support from your mentor and your team Working on features and projects that will have real impact for our learners and internal users A fun, mission-driven environment, where you’ll have lots of opportunities to grow as an engineer and make meaningful connections with your colleagues 👀 Past projects include... Developing a GPT-4 chat interface for one of our internal tools to streamline content creation Integrating our A/B testing framework with our observability stack to flag experiments that introduce errors Spanish audio lessons to improve listening comprehension Crafting new lessons to teach Coordinates in our Math course Porting large features to new platforms (iOS, Android, web) Dashboards and tooling for site reliability insights Crafting new microservices from scratch ❤️ Why you'll love working here... Language learning opportunities Catered in-house lunches, and breakfast and dinner options Company-wide Hackathon PTO and company holidays Frequent company-wide dinners, monthly celebrations, social clubs, and so much more! Connect with your recruiter on the benefits for interns at Duolingo! Hourly Range for this internship is: $54 — $56 USD Benefits: Take a peek at how we care for our employees' holistic well-being with our benefits here . Job Alerts: Sign up for job alerts here . Accommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com . Equal Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. Fraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information. By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice .

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in! At Duolingo, you’ll join a team that cares about educating our users, experimenting with big ideas, making fact-based decisions, and finding innovative solutions to complex problems. You’ll have limitless learning opportunities and daily collaborations with world-class minds — while doing work that’s both meaningful and fun. Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world. Read our blog to learn more. 🧠 What you'll do... Contribute to full-stack software projects by developing, testing, and maintaining features and services. Develop, release, and maintain services and/or infrastructure Lead individual project priorities, deadlines, and deliverables Contribute to code reviews and collaborate across teams to ensure quality and scalability ✅ What we're looking for... Graduating December 2027 - August 2028 Pursuing a B.S. or M.S. degree in Computer Science or a related technical field (e.g. math, physics or data science) Dedication to our mission of universally available education Programming experience in one or more of the following languages: Java, Python, Kotlin, or Swift. 12 weeks of consecutive availability May 24, 2027 - August 13, 2027 June 14, 2027 - September 3, 2027 Deadline to apply: September 30, 2026 ⭐ What you can expect... Close support from your mentor and your team Working on features and projects that will have real impact for our learners and internal users A fun, mission-driven environment, where you’ll have lots of opportunities to grow as an engineer and make meaningful connections with your colleagues 👀 Past projects include... Developing a GPT-4 chat interface for one of our internal tools to streamline content creation Integrating our A/B testing framework with our observability stack to flag experiments that introduce errors Spanish audio lessons to improve listening comprehension Crafting new lessons to teach Coordinates in our Math course Porting large features to new platforms (iOS, Android, web) Dashboards and tooling for site reliability insights Crafting new microservices from scratch ❤️ Why you'll love working here... Language learning opportunities Catered in-house lunches, and breakfast and dinner options Company-wide Hackathon PTO and company holidays Frequent company-wide dinners, monthly celebrations, social clubs, and so much more! Connect with your recruiter on the benefits for interns at Duolingo! Hourly Range for this internship is: $54 — $56 USD Benefits: Take a peek at how we care for our employees' holistic well-being with our benefits here . Job Alerts: Sign up for job alerts here . Accommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com . Equal Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. Fraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information. By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice .

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in! At Duolingo, you’ll join a team that cares about finding innovative solutions to complex technical problems , running countless experiments (300+ at a time!) with our massive user base to make data-driven decisions, and educating our users and employees alike. You’ll have limitless learning opportunities, mentorship and collaboration with world-class minds, and a variety of projects with large scopes — while doing work that’s both fun and meaningful. Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world. We’re looking for backend engineers who have experience building and operating reliable, scalable systems. Your background may be in product engineering, infrastructure, platform engineering, or a combination of these. What matters most is strong backend fundamentals, sound systems thinking, and the ability to take ownership of complex technical problems from design through production. Below you can find more information about the team we're hiring for: Duolingo Score: Duolingo Score is how we reflect a learner's real language proficiency back to them. As a backend engineer on this small, high-impact team, you'll help make learners care about their score as much as they care about their streak. You'll partner closely with the Score Pillar's product and design team and our iOS and Android engineers, working on the systems that power score calculation, proficiency modeling, and how score surfaces across the app — including integrations with external platforms like LinkedIn, so learners can showcase their proficiency beyond Duolingo. Ads: Duolingo's Monetization pillar builds the systems that fund our mission — from subscription packaging and advertising to ML-powered personalization. As a Backend Engineer on the Ads team, you'll work on a product engineering team responsible for growing and scaling Duolingo's ads business: high-quality ads that delight learners, fit seamlessly into the product experience, and meaningfully contribute to our bottom line. The team owns ad serving, mediation and demand, in-product ad formats and surfaces, and more. You'll work cross-functionally with product, design, data science, machine learning, and ad operations. Observability: The Observability team builds infrastructure and tools that give engineers confidence and clarity at Duolingo scale. We create monitoring, alerting, and debugging experiences that help teams ship faster and respond to incidents effectively. In this team, you'll build instrumentation frameworks, deploy telemetry infrastructure, design dashboards, and connect signals to catch issues before they impact learners. We're looking for engineers passionate about developer experience and reliability. AI Platform: As a member of the AI Tooling and Ecosystem Team, you will be responsible for developing and maintaining tools and services that power Duolingo's use of AI in the product. You will design systems for managing datasets, evaluating the performance of AI models, and building AI workflows. You will help shape how Duolingo builds features using AI, enabling teams to easily define quality metrics, combine human and AI feedback, and compare model performance across different use cases. 🧠 You will... Collaborate on software projects with product design and backend aspects Develop, release, and maintain backend services and/or infrastructure Lead individual project priorities, milestones, and ensure we're always shipping ✅ You have... A Bachelor’s degree in Computer Science or a related technical field Strong competencies in data structures, algorithms, and software design Experience programming in Java, Python, or Kotlin Solid understanding of one or more database technologies ⭐ Exceptional candidates will have... Industry experience building high-traffic APIs using public cloud providers Experience with industry observability technology, such as OpenTelemetry, Grafana, Prometheus, or DataDog. The offered salary is dependent upon several factors, including work experience, skills, and internal peer comparisons. The posted range is subject to change in the future. For this role, base salary is supplemented by equity compensation. We encourage you to talk with your recruiter for more information related to compensation for this role! Salary Range: $182,800 — $247,300 USD Benefits: Take a peek at how we care for our employees' holistic well-being with our benefits here . Job Alerts: Sign up for job alerts here . Accommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com . Equal Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. Fraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information. By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice .