Senior Backend Engineer - Learn, Core Systems

About SanaWe're on a mission to revolutionize how humans access knowledge through artificial intelligence. Throughout history, breakthroughs in knowledge sharing—from the Library of Alexandria to the printing press to Google—have been pivotal drivers of human progress. Today, as the volume of human knowledge grows exponentially, making it accessible and actionable remains one of humanity's most critical challenges. We're building a future where knowledge isn't just more accessible—it's a catalyst for achieving the previously impossible. If all of this sounds exciting, you’re in the right place.About The RoleThis role focuses on making the Learn platform (with emphasis on Manage, Insights, and APIs) scalable and maintainable for enterprise use. The main responsibility is to take systems that work at current scale and redesign them to handle significantly larger volumes of data, users, and entities (10–20x). The work is primarily architectural and system-level, addressing core bottlenecks and phasing out legacy implementations. Strong database expertise, particularly with Postgres, is valuable for success in this role.In this role, you willRedesign existing components to support enterprise-scale workloads, including high volumes of data and entitiesAnalyze and resolve deep-rooted system bottlenecks in storage, query performance, APIs, and data modelsLead the migration away from legacy implementations, ensuring replacements are sustainable and consistentImprove the reliability and efficiency of APIs and integrations, ensuring they can support both internal services and external enterprise clientsDrive technical projects from definition to delivery, including setting scope, coordinating with Product Managers, and aligning with other engineering teamsMaintain a long-term view of system health and ensure architectural decisions enable future growth and development speedShare technical knowledge with the team, review designs, and help establish best practices for backend and systems designWhat Success Looks LikeFocus on underlying architecture and scalability rather than short-term fixesProactively identify risks and propose technical solutions before issues become criticalBalance hands-on coding with architectural design and technical leadershipEnsure Learn’s core systems can support larger enterprise customers without performance or reliability degradationApply solid database knowledge (Postgres, schema design, query optimization, indexing strategies) to improve performance and scalabilityWhat we offerHelp shape AI's future alongside brilliant minds from Notion, Dropbox, Slack, Databricks, Google, McKinsey, and BCG. Competitive salary complemented with a transparent and highly competitive options program. Swift professional growth in an evolving environment, supported by a culture of continuous feedback and mentorship from senior leaders. Work with talented teammates across 5+ countries, and collaborate with customers globallyRegular team gatherings and events (recently in Italy and South Africa)