9H Digital

Full-stack Engineer

• Design and build APIs and business logic in Python using FastAPI, SQLAlchemy, and Pydantic
• Evolve a multi-tenant PostgreSQL data model, including schema design, migrations, performance, and data isolation
• Integrate with third-party finance and business platforms
• Handle authentication, retries, idempotency, reconciliation, and partial failures
• Contribute to AI-assisted features using LLMs and structured outputs
• Build reliable controls, evidence, and review workflows around AI-generated outcomes
• Build and ship frontend features in React and TypeScript
• Debug issues across the full processing path
• Write automated tests and ship through peer-reviewed pull requests and CI/CD

Full Stack Engineer