Senior Backend Developer - Python/FastAPI (PACS)

Job Overview

We are seeking a Senior Backend Developer with deep, hands-on FastAPI experience to build and scale high-performance backend services for our medical PACS platform.

This role is FastAPI-centric. Candidates must have proven production experience designing, building, and maintaining FastAPI-based systems, including async workflows, background processing, and healthcare-grade reliability.

🔴 Mandatory Core Requirement (Non-Negotiable)

Strong, real-world FastAPI experience is REQUIRED.

Candidates without production FastAPI experience will not be considered.

Key Responsibilities

• Architect, develop, and maintain FastAPI-based backend services
• Build async, high-throughput APIs using FastAPI (asyncio, aiohttp)
• Design and maintain OpenAPI / Swagger-compliant REST APIs
• Implement event-driven and background processing (Celery + Redis/RabbitMQ)
• Develop multi-tenant SaaS backend architecture
• Integrate with medical imaging and healthcare workflows (PACS, DICOM)
• Optimize PostgreSQL queries, indexes, and performance
• Implement secure identity and access management (SAML, OIDC, SCIM)
• Ensure backend scalability, reliability, and security for healthcare systems
• Write tests with pytest and participate in code reviews
• Technical Requirements - Must Have (All Required)
• 4+ years Python backend development
• Strong production experience with FastAPI (MANDATORY)
• Async programming with FastAPI, asyncio, aiohttp
• REST API design with OpenAPI / Swagger
• PostgreSQL (advanced queries, indexing, optimization)
• SQLAlchemy & Alembic
• Pydantic for schema validation
• Multi-tenant SaaS architecture
• Background jobs using Celery
• Message brokers: RabbitMQ and/or Redis
• Docker & Docker Compose
• Git workflow, pull requests, and code reviews
• Automated testing using pytest
• Event-driven backend architectures
• Nice to Have (Strong Plus)
• Healthcare standards: DICOM, HL7, FHIR
• Kubernetes & Helm
• Observability tools (Prometheus, Grafana, Sentry)
• CI/CD pipelines (GitHub Actions, GitLab CI)
• API Gateways (Kong, Traefik)
• OWASP security best practices
• Prior work on medical, PACS, or regulated systems

What Success Looks Like

• Fast, reliable, and scalable FastAPI services in production
• Clean, well-tested backend architecture
• Stable healthcare workflows with zero-tolerance for downtime
• Strong ownership of backend quality and performance