Required Core Tech Stack:We're looking for engineers with hands-on experience across most of the following technologies:Python Backend Development (3+ years)FastAPI (2+ years of production experience required)PostgreSQLMongoDBRedisDockerCelery or equivalent async task queuesREST APIs & MicroservicesAWS/GCPGitLab CI/CDThe selected Sr. Backend engineer will ship the backbone that powers 4 million + learners in 64 countries—owning APIs that crunch 1 billion learning events & the AI that supports it with