Senior Backend Engineer (AI Focus)

Atrix AI•New York City, NY

8h•Onsite

About The Position

Atrix Medical affairs teams at pharma companies are drowning in unstructured data—field notes from medical science liaisons, conference takeaways, real-world insights from post-market studies, scattered across dozens of sources. By the time these insights reach clinicians, they're stale. We're fixing that. Atrix helps medical affairs teams extract insights from messy, unstructured sources and turn them into action—so emerging findings get to clinicians faster and drugs are delivered more effectively. We're working with top-20 pharma companies and winning head-to-head against larger competitors because we actually listen to customers and build what they need.

Requirements

4+ years with Python
2+ years building production REST APIs with FastAPI, Django, or Flask
PostgreSQL experience including schema design
Familiarity with async Python patterns
Docker containerization experience
Some exposure to cloud infrastructure (AWS preferred)

Nice To Haves

Redis and Celery for distributed task processing
Deep query optimization and database performance tuning
Kubernetes experience
Vector databases (Qdrant, Pinecone) or embeddings experience
LLM framework experience (LangChain, LlamaIndex)
Healthcare or life sciences domain experience

Responsibilities

Design and implement scalable APIs
Optimize database performance
Build distributed task processing systems
Ensure our platform can handle the demands of enterprise pharma customers
Own our FastAPI-based backend services, including REST APIs serving complex AI workflows
Own database architecture and query optimization in PostgreSQL
Own distributed task processing with Celery and Redis
Own infrastructure and deployment pipelines on AWS (EKS, S3, SQS, Lambda)
Own integration with LLM frameworks (LangChain, LlamaIndex) and vector databases
Own backend features that power document processing, data enrichment, and real-time communication