colo.ai
Backend Developer
Mar 2026 – Jun 2026
Astana, Kazakhstan
Designed and built the backend for a medical imaging analysis platform from scratch: FastAPI, async PostgreSQL/SQLAlchemy 2.0, Redis, S3 — 10 domain modules, 9 Alembic migrations.
Key Technical Contributions:
- Implemented JWT authentication, RBAC, and clinic-level data scoping for patients and studies at the API layer
- Designed the ML integration pipeline using a claim-check pattern (presigned S3 URLs) for asynchronous image analysis, offloading file transfer load from the backend
- Set up CI/CD with GitHub Actions: automated build, push to GHCR, SSH deploy with automatic Alembic migration runs
- Closed critical pre-production security gaps: rate limiting on auth endpoints, closed public ports in docker-compose, added healthchecks, switched S3 image delivery to streaming instead of loading into memory
FastAPIPythonSQLAlchemy 2.0 (async)PostgreSQLRedisS3AlembicDockerGitHub ActionsGHCR
