Architect and scale search infrastructure to billions of documents in multi tenant environments
Design hybrid search that combines keyword search with semantic understanding and vector search
Build ranking and personalization systems that learn from user behavior
Collaborate with AI engineers to integrate large language models into the search pipeline and build retrieval augmented systems
Optimize search performance across query parsing, index design, and distributed architecture
Lead development of search observability and quality frameworks with clear metrics and monitoring
Work closely with product and design to shape the future of knowledge discovery at Sana
What success looks like
Search systems scale elegantly to billions of documents and millions of queries with strict latency targets
Systems apply proven IR techniques and practical advances in semantic AI retrieval
Search quality issues are detected early through strong observability and automated regression checks
You balance implementation with system design and mentor others on search and IR fundamentals
Deep expertise in search infrastructure (index optimization, query planning, distributed retrieval, caching) prevents performance issues before users see them
The stack evolves from traditional search to AI powered discovery, including embeddings, reranking, and RAG, while staying reliable
Search infrastructure supports enterprise deployments with strict SLAs, multi tenancy isolation, and very high uptime
Our tech stack
We build on a simple modern stack optimized for both humans and AI. - Backend: TypeScript, Kotlin, Node.js
Frontend: TypeScript, React, Tailwind
Databases: Postgres, Redis
Cloud infra: GCP/Kubernetes/Terraform
What we offer
Help shape AI's future alongside brilliant minds from Google, Apple, Spotify, Notion, Slack, Databricks, and BCG. - Competitive salary complemented with a competitive RSU 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 global customers, from our beautiful office in Stockholm.