I will build custom web applications, apis and fix software bugs using react

S
sarthak_technic
S
sarthak_technic
Sarthak S
build custom web applications, apis and fix software bugs using react
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build custom web applications, apis and fix software bugs using react
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build custom web applications, apis and fix software bugs using reactbuild custom web applications, apis and fix software bugs using reactbuild custom web applications, apis and fix software bugs using react

About this gig

Are you looking for a reliable software developer to turn your idea into a functional, scalable application? Youve come to the right place.

I am a professional software engineer with expertise in building robust web applications, REST APIs, and custom software solutions. Whether you need to fix a critical bug, integrate third-party APIs, or build a web app from scratch, I deliver clean, maintainable, and efficient code.

What I Offer:

  • Custom Web Applications: Modern, responsive frontends combined with powerful backends.
  • RESTful API Development & Integration: Connecting services, payment gateways, and database workflows.
  • Bug Fixing & Optimization: Resolving performance bottlenecks, fixing broken features, and refactoring code.
  • Database Architecture: Designing optimized schemas in SQL (PostgreSQL/MySQL) or NoSQL (MongoDB).

Tech Stack I Specialize In:

  • Frontend: React, Next.js, HTML5, CSS3, JavaScript/TypeScript, Tailwind CSS
  • Backend: Python (Django/FastAPI), Node.js (Express)
  • Database: PostgreSQL, MySQL, MongoDB
  • DevOps & Tools: Git, Docker, AWS, Heroku, Vercel

Why Work With Me?

  • Clean & Scalable Code: Written with future growth and maintenance in mind.


  • Programming language

    • Python

  • Expertise

    • Debugging
    • Operating systems
    • Databases
    • Source control
    • Testing procedures

  • Frontend framework

    • Backbone.js
    • Flutter
    • Next.js
    • React.js
    • Tailwind CSS

  • Backend framework

    • Django
    • Express.js
    • FastAPI
    • Flask
    • Node.js

  • AI & low/no code builders

    • Claude
    • Replit
    • Bubble
    • FlutterFlow
    • Glide

Get to know Sarthak S

Sarthak S

FullStack Mobile App Developer

  • FromIndia
  • Member sinceJul 2026

  • Languages

    Hindi, English
I am a self-taught, production-focused Developer specializing in building high-performance web systems and native mobile architectures. I have a proven capability in engineering resource-optimized backends, reducing operational API overhead via strict server-side caching, and managing geospatial database indexing. I am looking to deliver immediate value to a fast-scaling engineering team.

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