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Relixir (X25) Logo

Software Engineer Intern, Backend & AI

Relixir (X25)

Salary not specified
Aug 28, 2025
Remote, US • San Francisco, CA, US
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Relixir is looking to solve the problem of maximizing autonomous search share for B2B companies across Google and AI search engines.

Requirements

  • Python
  • TypeScript
  • Linux
  • Docker
  • PostgreSQL
  • Amazon Web Services (AWS)
  • FastAPI
  • AWS (ECS, Fargate)
  • Qdrant
  • LLM calls
  • RAG (Retrieval-Augmented Generation)
  • Experience building backend & AI software for VC-backed startups
  • Strong proficiency in Python and TypeScript
  • Experience with Docker, FastAPI, PostgreSQL, and AWS
  • Built and deployed a complex agentic/LLM-backed (context engineering, RAG with vector db) into production to customers
  • Have completed at least one 0 -> 1 journey of a functional product
  • Experience working with any of AWS ECS + SQS + Fargate, QDrant, LangChain

Responsibilities

  • Building and scaling services in Python (FastAPI) with PostgreSQL as our primary database.
  • Managing AWS infrastructure — primarily ECS/Fargate , Lambda, S3, and related services.
  • Designing APIs for our frontend (TypeScript) and partner integrations.
  • Building agentic workflows and pipelines for large-scale LLM calls (OpenAI, Gemini, Perplexity).
  • Designing and maintaining RAG (Retrieval-Augmented Generation) systems using Qdrant for vector search.
  • Optimizing prompt engineering, retrieval strategies, and evaluation systems.
  • Design and deploy large-scale AI workflows – multi-agent pipelines, RAG architectures with Qdrant, and high-volume LLM call orchestration.

Other

  • US citizen/visa only
  • Pursuing Bachelors in Computer Science from Top US Unverisity (Stanford, Berkeley, MIT, GeorgiaTech, etc.)
  • In-person SF
  • High-agency
  • Deeply Curious
  • Relentlessly Driven
  • True Owner
  • Collaborative & Humble
  • Entrepreneurial Mindset: Ex-founder or future founder