Backend Engineer (Agents)

About SanaAt Sana, we're on a mission to bring superintelligence to work—a seamless, beautiful way to access all your company’s apps, knowledge, and data. We are obsessed with making AI agents do real work to empower our users to process and act on knowledge at an unprecedented scale.We’re a talent-dense team of engineers and designers in Stockholm, united by a passion for building great products with deep technical excellence. Our backgrounds span AI research at Google, distributed systems at Spotify, product design and AI infrastructure at Apple, competitive programming, and scaling fast-growing startups. At Sana, everyone is an owner. We cut out processes, maximize impact, and value rapid prototyping and iteration.Our AI tools already help over a million people learn and work better across hundreds of leading enterprises. But we’re just getting started—there’s so much more to build. Join us to tackle some of the most challenging and meaningful problems of our generation.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, 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)