Backend & API Development with NestJS, FastAPI & PostgreSQLBalwan Bamniya
Need a backend your team can trust and build on? I design and build clean, well-tested APIs and service layers in TypeScript (NestJS, Express) or Python (FastAPI), backed by PostgreSQL. This works for a new product or an existing codebase that needs a stronger foundation.
What you get
API and data-model design: REST endpoints, validation, and clear error handling
Authentication, roles, and permission checks
PostgreSQL schema, migrations, and constraints (Prisma or Drizzle)
Background jobs, queues, and webhooks (Redis-backed where needed)
Payment and third-party integrations
Unit and integration tests, plus OpenAPI / README documentation
Performance, security, and reliability fixes for existing APIs
How we work
Review: I read your requirements or existing code and agree on a scope.
Design: data model and endpoint contract are shared before implementation.
Build: incremental pull requests with tests, so you can review as we go.
Hand over: deployed, documented, and easy for your team to extend.
Recent work
AI Kanban Board: NestJS + PostgreSQL + Redis backend with 39 REST endpoints, realtime presence over Socket.IO, a retry-safe AI job queue, and 187 passing tests.
ClientFlow: about 61 API endpoints across 3 Cloudflare Workers, with tenancy-scoped data and atomic writes.
The starting price covers a focused API module (for example auth + 1 to 2 core resources). Larger systems are quoted per milestone.
FAQs
Starting at$800
Duration2 weeks
Tags
ExpressJS
FastAPI
NestJS
PostgreSQL
Python
Redis
TypeScript
Backend Engineer
REST API
Service provided by
Balwan Bamniya Indore, India
- 1
- Followers
Backend & API Development with NestJS, FastAPI & PostgreSQLBalwan Bamniya
Starting at$800
Duration2 weeks
Tags
ExpressJS
FastAPI
NestJS
PostgreSQL
Python
Redis
TypeScript
Backend Engineer
REST API
Need a backend your team can trust and build on? I design and build clean, well-tested APIs and service layers in TypeScript (NestJS, Express) or Python (FastAPI), backed by PostgreSQL. This works for a new product or an existing codebase that needs a stronger foundation.
What you get
API and data-model design: REST endpoints, validation, and clear error handling
Authentication, roles, and permission checks
PostgreSQL schema, migrations, and constraints (Prisma or Drizzle)
Background jobs, queues, and webhooks (Redis-backed where needed)
Payment and third-party integrations
Unit and integration tests, plus OpenAPI / README documentation
Performance, security, and reliability fixes for existing APIs
How we work
Review: I read your requirements or existing code and agree on a scope.
Design: data model and endpoint contract are shared before implementation.
Build: incremental pull requests with tests, so you can review as we go.
Hand over: deployed, documented, and easy for your team to extend.
Recent work
AI Kanban Board: NestJS + PostgreSQL + Redis backend with 39 REST endpoints, realtime presence over Socket.IO, a retry-safe AI job queue, and 187 passing tests.
ClientFlow: about 61 API endpoints across 3 Cloudflare Workers, with tenancy-scoped data and atomic writes.
The starting price covers a focused API module (for example auth + 1 to 2 core resources). Larger systems are quoted per milestone.
FAQs
$800