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Duolingo Score is how we reflect a learner's real language proficiency back to them. As the team lead / 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
The Time Spent Learning team is dedicated to motivating learners to spend more time engaging meaningfully with the Duolingo app. Our mission is to grow genuine, sustained learning time by designing and iterating on the mechanics that motivate consistent, high-effort practice so learners make real progress toward fluency each day. As a small, cross-functional team of product, design, and engineering, we own a metric that shapes learning outcomes for millions of users and get to shape the Duolingo experience
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
$182,800—$247,300 USD