Backend Engineer (Learn)

About SanaAt Sana, we’re building Learn—an AI-powered learning platform that combines the simplicity of a modern LMS with intelligent features like AI tutor, automated content generation, and interactive apps. Our goal is to help enterprises make knowledge not just accessible, but actionable at scale.We’re a product-obsessed team of engineers and designers from companies like Google, Spotify, and Databricks, united by a focus on technical excellence and rapid iteration. With Learn already supporting hundreds of leading enterprises, we’re just getting started—and there’s much more to build.About The RoleYou'll build and evolve the core services that power agents and product features, with a focus on enterprise-scale workloads, performance optimization, and long-term architectural sustainability. You drive architecture and systems design to ensure our platform can support high volumes of data, entities, and demanding enterprise clients.In this role, you willDesign and decompose services and APIs for scale and clarityBuild eventing and queue systems for reliable, high-throughput data flowsLead schema evolution, migrations, query/index optimization and caching strategiesDefine and enforce consistency models and multi-region readinessOptimize for performance budgets and privacy/tenant isolationWork hands-on with TypeScript/Node, Postgres, and distributed systems primitivesWhat success looks likeCore services are reliable, scalable, and easy to evolveRisks are identified and solved before issues become criticalAPIs are clear, well-documented, and power seamless product experiencesData boundaries are robust—privacy and tenant isolation are never compromisedPerformance budgets are met, even under heavy loadYou are a trusted partner for distributed systems design and implementationOur tech stackWe build on a simple modern stack optimized for both humans and AI:Backend: TypeScript, Kotlin, Node.jsFrontend: TypeScript, React, TailwindDatabases: Postgres, RedisCloud infra: GCP/Kubernetes/TerraformWhat 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)