[Remote] Staff Data Scientist, Forecasting in Monetization

🌍 Remote, USA 🎯 Full-time 🕐 Posted Recently

Job Description

Note: The job is a remote job and is open to candidates in USA. Duolingo is on a mission to develop the best education in the world and make it universally available. They are seeking a Staff Data Scientist to own and evolve their critical financial forecasting systems, working closely with product and engineering leadership, finance teams, and senior executives to produce accurate and explainable forecasts.

Lead the financial forecasting system. Drive methodology, implementation, maintenance, and delivery as the technical owner of our revenue forecasting stack, in close partnership with the finance team. Publish forecasts that serve as the source of truth for company-wide planning and investor-facing decisions
Model subscription + experimentation dynamics. Develop modeling architectures that account for experimental lift, cohort behavior, seasonality, and more, making it clear what’s real impact and what’s noise across the hundreds of experiments Duolingo runs each quarter
Investigate deviations and lead with insight. When forecasts miss, lead the root-cause analysis by quantifying drivers of over- or under-performance (e.g. product changes, user behavior shifts, macro trends), collaborating across functions, and clearly communicating what happened and why to senior leadership. Build and be responsible for the statistics, tools, and dashboards that scale these insights across the company
Advance the technical frontier. Push our evolution beyond traditional time-series extrapolation and toward more sophisticated approaches such as cohort-based forecasting, retention chaining, and/or causal impact modeling, grounded in business realism and model interpretability
Mentor and influence. Serve as a technical mentor to data scientists across the organization, set a high standard for modeling, communication, and statistical rigor, and develop roadmaps for forecasting infrastructure and innovation

6+ years of proven experience building production-grade forecasting systems
Deep applied knowledge of subscription models and understanding of churn dynamics, cohort behaviors, and retention curves
Advanced degree (Masters or PhD) in Data Science, Economics, Statistics, or a related quantitative field
Experience assessing and applying theoretical approaches in real-world situations (ex. when to use Bayesian structural models, when causal inference is vital, when a robust heuristic is better than over-fitting noise, etc.)
Experience distilling uncertainty, nuance, and model tradeoffs into streamlined, actionable narratives for finance and senior leadership partners
Ability to communicate complex forecasting logic clearly and stand by your work in moments of ambiguity
Track record of collaboration across technical and non-technical teams
Consistent record of integrating feedback, aligning across functions, and operating with a strong sense of ownership and service
Strong judgment when balancing model complexity, interpretability, and speed of development
Expertise writing clean, well-documented code in Python and SQL
Building reliable, multipurpose production pipelines
Past work in organizations where A/B testing is constant, complicating training data and historical baselines

Duolingo is a language-learning education platform that offers 98 total courses across nearly 40 distinct languages. It was founded in 2011, and is headquartered in Pittsburgh, Pennsylvania, USA, with a workforce of 501-1000 employees. Its website is https://www.duolingo.com.

Duolingo has a track record of offering H1B sponsorships, with 41 in 2025, 46 in 2024, 36 in 2023, 19 in 2022, 14 in 2021, 17 in 2020. Please note that this does not guarantee sponsorship for this specific role.

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