Python Backend Developer – Production System Integration

Keystone Digital

Contract · Remote · Flexible hours

About the role

Keystone Digital is expanding its B2B SaaS platform with a new multi‑tenant capability called Atlas Hub. We need a Python Backend Developer to design and ship the core tenant isolation layer, ensuring data segregation and performance for dozens of enterprise clients.

Key responsibilities

• Architect and implement a tenant‑aware PostgreSQL schema using SQLAlchemy and Alembic migrations.
• Build RESTful services in FastAPI to expose tenant‑specific billing and usage endpoints.
• Containerize micro‑services with Docker and configure CI pipelines for automated testing.
• Write integration tests with pytest to validate data isolation across tenant boundaries.
• Collaborate with the DevOps team to set up Kubernetes namespaces for each tenant environment.
• Deliver a functional MVP of the Atlas Hub tenant provisioning flow within eight weeks.

Must-have skills

• Strong Python development experience, especially with FastAPI or Flask.
• Deep knowledge of PostgreSQL, including partitioning and role‑based access.
• Proficiency in building REST APIs and handling authentication/authorization.
• Hands‑on Docker usage and container orchestration basics.
• Experience with automated testing frameworks such as pytest.

Nice to have

• Familiarity with Kubernetes or Helm charts.
• Exposure to multi‑tenant SaaS architectures.