Founding Backend Engineer (AI Focus) - Atrix

The role

You will design and own major modules of the backend architecture including APIs, workers, and orchestration. You will work on scalable data pipelines, robust APIs, and real-time inference systems to power AI-native workflows.

What you will do

• Design and own major modules of our backend architecture (APIs, workers, orchestration)
• Optimize performance and reliability of data processing and AI inference systems
• Build and maintain LLM-powered backend features and multi-step workflows
• Collaborate with product and AI teams to launch performant, production-grade AI features
• Improve observability, traceability, and modularity of backend systems
• Lead customer-focused feature delivery with high attention to security and compliance

Required qualifications

• 5+ years backend engineering experience in fast-paced product teams
• 2+ years of Python experience, including async programming
• Expertise with one or more frameworks: FastAPI, Flask, Django
• Strong experience with SQL (PostgreSQL) and ORMs (SQLAlchemy or equivalent)
• Experience building APIs, background workers, and distributed systems
• Understanding of how LLMs, embeddings, or RAG workflows function
• Startup experience or demonstrated ownership in complex backend projects

Nice to have

• Familiarity with Celery, LangChain, LlamaIndex, or other LLM orchestration tools
• Exposure to RAG or context injection workflows
• Experience with AWS, Terraform, Kafka, or PyTorch
• Background in healthcare, data security, or regulated environments

Benefits

• Competitive salary + equity package
• Health & wellness support – Stipend + medical (vision, dental, health) insurance coverage
• Unlimited PTO

About the company

Atrix builds purpose-built AI for life sciences, designed for the accuracy and rigor biopharma requires. They are live with top-10 pharmaceutical companies and focused on helping treatments reach patients sooner.