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Founding Engineer (Full-stack)

Relixir

Salary not specified
Oct 29, 2025
San Francisco, CA, United States of America
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Relixir is looking to build out its founding engineering team to develop and scale its AI search automation platform, requiring hands-on full-stack development and strategic input on product and technology direction.

Requirements

  • Strong proficiency in Next.js, Typescript, and Python
  • Leveraged LLMs for building critical product features
  • AWS Infrastructure Management
  • Timescaledb or any OLAP experience
  • Qdrant/RAG, LangChain/LLM tooling, prompt/eval experience.

Responsibilities

  • Architect and ship core product surfaces with Next.js + Typescript
  • Design and implement high quality user experiences for complex state / data patterns
  • Deliver fast and clear data visualizations for millions of data points from various sources
  • Building features in Python (FastAPI) with PostgreSQL as our primary database.
  • Managing AWS infrastructure — primarily ECS/Fargate, Lambda, S3, and related services.
  • Designing APIs for the frontend (TypeScript) and partner integrations.
  • Working on AI (LLM-powered) features end-to-end

Other

  • In-person, SF
  • High-agency
  • 1-3+ years of experience building frontend & backend software for VC-backed startups
  • Have completed at least one 0 -> 1 journey of a functional product
  • Entrepreneurial Mindset: Ex-founder or future founder