Duolingo

Staff AI Research Engineer at Duolingo focused on the Monetization team, developing and deploying AI systems including bandit models and large language models to improve the learning experience and drive business objectives. The role involves full-stack ML development from feature engineering and training data to fine-tuning, reinforcement learning, evaluation, deployment, and monitoring.

Senior Engineering Manager for Duolingo's Monetization pillar, leading a cross-functional team to build and scale revenue-generating systems including subscription packaging, advertising, ML-powered personalization, and performance marketing. The role involves defining strategy, overseeing engineering systems for paid growth, collaborating with data science and ML partners, and ensuring engineering quality.

Senior Engineering Manager for Duolingo's Monetization pillar, leading a cross-functional team to build and scale revenue-generating systems including subscription packaging, advertising, ML-powered personalization, and performance marketing. The role involves defining strategy, overseeing engineering systems for paid growth, collaborating with data science and ML partners, and ensuring engineering quality.

Director of Data Science & Analytics, User Growth at Duolingo. This role involves leading a team of 6-10 data scientists, setting the analytical vision and roadmap for user growth, owning experiments and causal analyses, developing forecasting systems, driving business intelligence, and translating complex findings for senior leadership. The ideal candidate has deep technical fluency in causal inference, statistical/ML modeling, and experimentation, combined with strong leadership abilities. Experience with AI/ML applied to user behavior modeling, notification optimization, or personalization is a plus.

Director of Data Science & Analytics, User Growth at Duolingo. This role involves leading a team of 6-10 data scientists, setting the analytical vision and roadmap for user growth, owning experiments and causal analyses, developing forecasting systems, driving business intelligence, and translating complex findings for senior leadership. The ideal candidate has deep technical fluency in causal inference, statistical/ML modeling, and experimentation, combined with strong leadership abilities. Experience with AI/ML applied to user behavior modeling, notification optimization, or personalization is a plus.

Senior Accountant, Indirect Taxes role at Duolingo, focusing on day-to-day indirect tax operations and compliance (sales/use tax, VAT/GST) in the U.S. and internationally. Responsibilities include partnering with external advisors, resolving notices/audits, building scalable processes, improving tax data quality (vendor onboarding, 1099 readiness), and owning fixed assets accounting. The role collaborates with AP, FP&A, and Internal Audit, and requires experience in indirect tax operations and/or public company accounting, documentation skills, and cross-functional communication. Exceptional candidates will have experience with global VAT/GST, implementing tax engines, SOX controls, and consumer tech/subscription businesses.

Senior Accountant, Indirect Taxes role at Duolingo, focusing on day-to-day indirect tax operations and compliance (sales/use tax, VAT/GST) in the U.S. and internationally. Responsibilities include partnering with external advisors, resolving notices/audits, building scalable processes, improving tax data quality (vendor onboarding, 1099 readiness), and owning fixed assets accounting. The role collaborates with AP, FP&A, and Internal Audit, and requires experience in indirect tax operations and/or public company accounting, documentation skills, and cross-functional communication. Exceptional candidates will have experience with global VAT/GST, implementing tax engines, SOX controls, and consumer tech/subscription businesses.

Software Engineer I role at Duolingo in Beijing, China, focused on building and shipping features to drive user growth and deliver high-quality learning experiences for millions of learners in China. The role involves collaborating with product managers, designers, and government relations to ensure product compliance and improve key metrics like DAU. Requires a BS/MS in Computer Science or related field and 0-1 years of programming experience in Java, Python, Kotlin, or Swift.

Manage a team of Creative Technologists and directly contribute to creating interactive, production-ready experiences using art, motion, and interactivity for Duolingo's learning platform. This role involves leading prototyping, building systems, and shaping tooling to improve team efficiency, reporting to the Senior Manager of Creative Technology.

Manage a team of Creative Technologists and directly contribute to creating interactive, production-ready experiences using art, motion, and interactivity for Duolingo's learning platform. This role involves leading prototyping, building systems, and shaping tooling to improve team efficiency, reporting to the Senior Manager of Creative Technology.

This role is for a Lead Technical Recruiter focused on Product Management hiring at Duolingo. The recruiter will partner with the Chief Product Officer to build and shape the Product organization, define hiring strategies, and manage full-cycle recruiting for Product roles at all levels. Responsibilities include driving sourcing strategy, using data to diagnose pipeline health, championing the candidate experience, and building hiring infrastructure like interview frameworks.

Lead Technical Recruiter for Product Management at Duolingo, responsible for full-cycle recruiting, shaping hiring strategy, and building recruiting infrastructure. Requires 7+ years of experience in Product hiring, partnering with senior leaders, and data fluency.

Recruiter for Duolingo's Business, Marketing, and Creative teams, responsible for full-cycle searches, partnering with hiring managers, and ensuring a high-quality candidate experience. Utilizes data to inform decisions and experiments with AI tools to support recruiting workflows.

Senior Software Engineer (Android) role focused on expanding Duolingo's user base in India by delivering product features, optimizing growth strategies, and resolving retention/engagement issues. Requires strong Android development experience, data-driven decision making, and collaboration.

Recruiter for Duolingo's Business, Marketing, and Creative teams, responsible for full-cycle searches, partnering with hiring managers, and ensuring a high-quality candidate experience. Utilizes data to inform decisions and experiments with AI tools to support recruiting workflows.

Senior Software Engineer role focused on improving the Android user experience through performance optimizations and experiment analysis for Duolingo's Asia Growth team.

Staff Software Engineer role at Duolingo focused on improving the Android user experience through performance optimizations and experiment analysis. This role is part of the new Asia Growth team and requires strong Android development skills in Kotlin and experience in diagnosing and resolving performance issues.

Engineering Manager for Duolingo's Notifications team, focusing on improving learner engagement and habit formation through the notifications pipeline. This role involves technical leadership, people management, product strategy, driving execution of projects, and using data for A/B testing and product improvements. The team aims to ship impactful work that moves company metrics, with a focus on retention KPIs.

Engineering Manager to lead a product engineering team focused on notifications, driving roadmap, execution, and outcomes for learner engagement and retention in a consumer education product. Requires technical leadership, people management, and product strategy in a data-driven, experimental environment.

Senior Android Engineer focused on optimizing build times, modularization, and CI/CD pipelines for the Duolingo Android app.

Platform Engineer role focused on building and operating core compute primitives on Kubernetes, improving CI/CD pipelines, and ensuring platform reliability at scale for Duolingo's applications.

Platform Engineer II role focused on building and operating the core compute platform powering Duolingo's applications, including Kubernetes infrastructure, GitOps, deployment patterns, SLOs, and self-service tooling. The role aims to improve reliability, safety, and speed of service delivery for product engineers.

Senior Gameplay Programmer with Unity background to implement a new music course within the Duolingo app, productionize prototypes, and collaborate with designers and product partners to ensure a high-quality, gamified user experience.

Senior iOS Engineer role at Duolingo focused on improving core app performance and user experience in the iOS application. Responsibilities include developing, releasing, and maintaining native iOS applications, mentoring junior engineers, and collaborating on software projects. Requires strong Swift and iOS development skills, with exceptional candidates having experience with API design, multithreaded programming, and performance optimization.

Senior iOS Engineer role at Duolingo, focusing on building and releasing native iOS applications primarily in Swift for various teams (Math, Notifications, Core App Performance). The role involves collaborating with product design and backend teams, mentoring junior engineers, and driving technical improvements. Requires a strong foundation in computer science, data structures, algorithms, and Swift programming. Exceptional candidates will have proven experience in building and maintaining production-level iOS apps, API design, multithreaded programming, and unit testing.

Senior Android Engineer at Duolingo, focusing on building and optimizing features for subscription crossgrades and user retention. The role involves collaborating with product and design, developing native Android features in Kotlin, and mentoring junior engineers. Emphasis on data-driven decisions, rapid experimentation, and creating seamless, user-centered experiences to help learners achieve their goals.