Senior Backend Engineer (AI Focus)

Atrix AI

$120K — $160K *
Information Technology
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 4+ years of experience in Python programming.
  • 2+ years of experience building production REST APIs using FastAPI, Django, or Flask.
  • Proficiency in PostgreSQL, including database schema design.
  • Familiarity with asynchronous Python programming patterns.
  • Experience with Docker for containerization.
  • Basic knowledge of cloud infrastructure, preferably AWS.

Responsibilities

  • Build and maintain FastAPI-based backend services, focusing on REST APIs for complex AI workflows.
  • Optimize database architecture and performance for PostgreSQL.
  • Implement distributed task processing systems using Celery and Redis.
  • Develop infrastructure and deployment pipelines on AWS, utilizing services like EKS, S3, SQS, and Lambda.
  • Integrate large language model frameworks with vector databases for data processing.
  • Create backend features that support document processing, data enrichment, and real-time communication.
Full Job Description
The role

You'll be a core backend engineer building the services and infrastructure that power our AI platform. You'll design and implement scalable APIs, optimize database performance, build distributed task processing systems, and ensure our platform can handle the demands of enterprise pharma customers.

What you'll own
  • Our FastAPI-based backend services, including REST APIs serving complex AI workflows
  • Database architecture and query optimization in PostgreSQL
  • Distributed task processing with Celery and Redis
  • Infrastructure and deployment pipelines on AWS (EKS, S3, SQS, Lambda)
  • Integration with LLM frameworks (LangChain, LlamaIndex) and vector databases
  • Backend features that power document processing, data enrichment, and real-time communication


You bring
  • 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)


Bonus points
  • 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

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