I build the backends nobody notices.

I’m Gilbish Kosma, a full-stack developer in Bangalore, India.

Email me GitHub
GETapi.gilbish.dev/about 200 OK
{
"name": "Gilbish Kosma",
"role": "Full-stack developer",
"based_in": "Bangalore, India",
"experience": "5+ years",
"ships_with": "Claude Code, Codex"
}
content-type: application/json38 ms

Selected projects

Backends, an internal MVP and one published npm module.

  • Matchmaking app backend

    TheMaxion

    The full backend for a Dubai-based matchmaking app serving 100+ daily active users: API development, data security and database design.

    • API design
    • Security
    • Databases

  • Money transfer app

    GeekyAnts

    Led the backend refactor of a cross-border payments app sending money to Indian bank accounts, then monitored performance after the refactor.

    • Node.js
    • Express
    • PostgreSQL

  • Seat management

    GeekyAnts, internal

    An MVP for booking office seats, meeting rooms and amenities, with separate admin and employee interfaces.

    • Spring Boot
    • Java
    • React
    • TypeScript

  • whatsapp-country-code

    Open source on npm

    A published npm module that returns the country names and codes WhatsApp supports, with full documentation.

    • TypeScript
    • npm
  • Pull request merged into Appwrite’s templates repo
  • Ranked 86th in JS13k Games
5+years shipping web and mobile products
20K+active users on a backend I re-architected
#86in JS13k Games, a whole game under 13 KB

Where I’ve worked

a7f3c21Dec 2024 to Aug 2026Bangalore

Backend Developer at TheMaxion.

Built the backend for a Dubai-based matchmaking app serving 100+ daily active users. Designed the APIs, the database and the security layer that protects user data, and worked closely with frontend to tune performance and experience.

4e19b08Feb 2022 to Aug 2024GeekyAnts

Software Engineer II at GeekyAnts.

Revamped an application’s backend architecture for 20K+ active users, improved the NativeBase component library for React and React Native, and built full-stack apps end to end, from API to UI.

0c2d9e5Jan 2021 to Jan 2022Remote

Freelance Developer.

Delivered tailored frontend and backend projects for a range of clients, set requirements and timelines with cross-functional teams in Agile, and designed interfaces that meet accessibility standards.

initial commit2020Raipur

B.Tech, Computer Science at GEC Raipur.

Government Engineering College, Raipur, Chhattisgarh.

The toolkit

Working with AI
Claude, Claude Code, OpenAI Codex, Copilot, Cursor. LLM API integration, agentic workflows, MCP, RAG
Languages
JavaScript, TypeScript, Java, Python
Frontend and mobile
React, Next.js, Gatsby, React Native, Flutter
Backend
Node.js, Express.js, Spring Boot, REST API design
Data and cloud
PostgreSQL, Appwrite, database design, cloud services
Practice
Application security, performance, Agile, code review, mentoring