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Freelance · Product & Web

Backend & API Development

Backends are where web apps, mobile apps, devices and databases meet. I design and build REST APIs in .NET and Python (FastAPI, Flask) — and optimize the ones that have become slow or fragile.

Discuss your projectAll services
  • .NET
  • C#
  • FastAPI
  • Flask
  • Python
  • REST APIs
  • PostgreSQL
  • TimescaleDB
  • MSSQL
  • Docker
  • Nginx
  • Postman

What I can help with

Backend / APIs — what's included

  • 01

    REST API development

    Well-structured APIs for web and mobile clients.

  • 02

    Device & data APIs

    Endpoints that ingest sensor data and manage connected devices.

  • 03

    Computation services

    Backend logic for domain calculations — for example AQI computation across standards.

  • 04

    Integrations

    Connecting third-party services and AI APIs such as OpenAI.

  • 05

    API performance

    Finding and fixing slow endpoints and inefficient queries.

  • 06

    Production debugging

    Tracking down failures in running systems.

Relevant experience

Built on real work

  • .NET APIs for environmental monitoring

    IST Technologies

    .NET API development and optimization, AQI computation and production debugging.

  • AQI Prediction service

    Project

    Python / FastAPI service for predictive environmental analytics.

  • WBGT Monitoring

    Project

    FastAPI service running on a Raspberry Pi behind Nginx.

See projects & experience

A good fit if…

  • You need an API for a web app, mobile app or devices
  • Your existing API is slow, unreliable or hard to change
  • You work in .NET or Python

Remote · based in Hyderabad, India

How we'll work

A clear process, even when the problem isn't

I don't need to know everything before I start — I need to know how to figure it out.

  1. 01

    Understand

    Break down the problem and understand the system.

  2. 02

    Explore

    Research technologies and possible approaches.

  3. 03

    Build

    Create a practical working implementation.

  4. 04

    Debug

    Find bottlenecks, failures, and edge cases.

  5. 05

    Improve

    Optimize performance, reliability, scalability, and usability.

  6. 06

    Ship

    Deploy, monitor, support, and iterate.

Contact

Have a problem worth solving?

Whether you're building a product, solving a technical challenge, or exploring an interesting idea, I'd be happy to connect.

manjithreddy096@gmail.com
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Remote · based in Hyderabad, India

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