How Duolingo builds product

Duolingo has developed a unique product organization structure to scale from a small team to a large, metrics-driven company while maintaining agility and clear accountability. As the company grew beyond three PMs in 2016, traditional single-lead teams became insufficient for managing complex, cross-functional product development.

Duolingo implemented a "co-lead" structure where product teams are managed by 2-3 leaders from different functions (typically PM and Engineering, sometimes joined by Learning Science, Marketing, or Biz Ops). Teams are organized into "areas" that share common business goals, with each area also having cross-functional co-leads. The company structures teams as either metric-based (focused on clear KPIs like revenue or DAUs) or feature-based (focused on product problems without easily quantifiable metrics, like social features).

The co-lead approach delivered two key benefits: complementary skills from different functions created more effective leadership than single leads, and shared responsibilities reduced the time investment required to run high-performing teams. For feature-based teams without clear metrics, Duolingo uses qualitative signals like internal employee usage, user research, social media sentiment, and long-term holdout experiments.

Key takeaways for product managers include the value of shared leadership across functions, the importance of structuring teams around either clear metrics or specific product problems, and using multiple qualitative signals when quantitative metrics aren't sufficient to measure success.