Duolingo

About Duolingo

Duolingo is transforming education globally by offering free language learning to millions. You'll join a team that builds engaging, accessible educational products for over 500 million users across nearly 40 distinct languages. Beyond its core language app, Duolingo also provides the Duolingo English Test, an online English proficiency certification, and has expanded into math and music education. The company's freemium model ensures that high-quality learning is available to everyone, everywhere, regardless of their socioeconomic status.

How We Work

Duolingo fosters a mission-driven culture where open communication and rapid learning are paramount. You will thrive in an environment that prioritizes building excellent products through continuous experimentation and data-driven decisions. The company encourages adaptability and agility, with teams regularly sharing work for open review. Duolingo maintains a "wholesome but unhinged" and "quirky" culture, balancing creativity with structured processes as it has grown.

Engineering at Duolingo

Duolingo engineers solve complex problems at an immense scale, ensuring a high-quality experience for all learners, even on less performant devices and with unreliable internet connections. They optimize app performance, for example, by reducing Android startup time by 40%. The team also scales personalized learning experiences for millions of users through systems like Birdbrain, which tailors practice sessions. Duolingo leverages AI and remote proctoring for its English Test, making certification accessible and cost-effective. The technology stack relies on Amazon Web Services (AWS), including DynamoDB, EC2, and S3, and has evolved from Python to Scala for its core engine to achieve significant latency reductions and increased uptime.

Why Join Us

• Shape global education by contributing to products used by hundreds of millions of people.
• Engage with meaningful work and limitless learning opportunities alongside world-class minds.
• Work in a culture that balances intense product focus with a quirky, supportive environment.
• Contribute to a company that embraces data-driven decisions and continuous innovation.
• Benefit from comprehensive perks designed to support your well-being and growth.

Benefits & Perks

• 100% covered health, dental, and vision insurance for employees and eligible dependents.
• Generous vacation policy, including 20 days of PTO and an additional two-week winter break.
• Paid parental and adoption leave.
• 401(k) with company match and immediate vesting.
• Opportunities for professional development with a yearly stipend.
• Company equity and competitive compensation.
• On-site gym, massages, and chef-prepared meals (for HQ employees).
• Relocation assistance and a $10,000 first-time homebuyer bonus in Pittsburgh (for HQ employees).
• Commuter benefits and transportation reimbursement.
• Fertility benefits and free therapy sessions.