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You have reached codeopen.in — the home page of an independent full stack developer with 4+ years of professional experience building software that real businesses run on every day: insurance platforms, healthcare booking systems, delivery applications and connected hardware.
This page is deliberately plain. No spinners, no pop-ups, no consent banners, no 3 megabytes of JavaScript to tell you what I do. Just the facts, served fast — the way the web was meant to be. ◀ SCROLL DOWN FOR SERVICES
Looking for work samples, résumé or contact details? They all live on the portfolio site → portfolio.codeopen.in
01WEB APPLICATIONSComplete web applications built on the MERN stack. Dashboards, admin panels, booking systems and customer portals using React.js, Redux, RxJS and TypeScript, styled with Material UI or Tailwind CSS. |
02MOBILE APPLICATIONSCross platform Android and iOS applications with React Native from a single codebase — plus WebView based hybrid apps when an existing web product needs to reach the app stores quickly and cheaply. |
03BACKEND & APIsRESTful API design and implementation with Node.js / Express.js and Python FastAPI. Authentication, role based access, business logic, Redis caching and clean data models on MySQL or MongoDB. |
04MICRO-FRONTEND ARCHITECTURELarge platforms split into independently deployable frontends so multiple teams can ship without stepping on each other. Delivered at production scale for regulated insurance products. |
05DEPLOYMENT & INFRASTRUCTUREYour application containerised with Docker or Podman, put behind Nginx with TLS, and deployed on a Linux server or Firebase hosting. Sensible logging, environments and repeatable builds included. |
06THIRD PARTY INTEGRATIONSPayment gateways such as Razorpay, Google Calendar scheduling, Firebase authentication and push notifications, e-mail / SMS providers and any REST or webhook based service your product depends on. |
07IoT & HARDWAREESP32 and Arduino firmware wired to the web. Live temperature and humidity telemetry over WebSockets, remote control of lights and relays, and dashboards that show what your hardware is doing right now. |
08MAINTENANCE & RESCUEInherited a code base nobody understands? I take over existing projects for bug fixing, troubleshooting, performance optimisation, dependency upgrades and ongoing maintenance. |
STATUS: senior software engineer by day · available for select freelance and contract work
| FRONTEND | React.js, Redux, RxJS, TypeScript, JavaScript (ES6+), Material UI, Tailwind CSS, HTML5, CSS3 |
|---|---|
| MOBILE | React Native (Android & iOS), hybrid WebView applications |
| BACKEND | Node.js, Express.js, FastAPI (Python), REST APIs, WebSockets, Redis |
| DATABASES | MySQL, MongoDB, Firebase Realtime Database |
| INFRASTRUCTURE | Docker, Podman, Nginx, Linux, Firebase Hosting, CI friendly builds |
| HARDWARE | ESP32, Arduino, sensor integration, WebSocket telemetry |
| VERSION CONTROL | Git, GitHub, GitLab |
| LANGUAGES | JavaScript, TypeScript, Python — speaking: English, Hindi, Bengali |
| EDUCATION | Bachelor of Computer Applications · Master of Computer Applications (in progress) |
| BASED IN | Kolkata, West Bengal, India · working remotely worldwide |
| codeopen.in | This page. Overview of services. ◄ YOU ARE HERE |
|---|---|
| portfolio.codeopen.in | Project gallery, résumé and all contact details |
| chat.codeopen.in | Send a message directly, no forms to fill in |
| labs.codeopen.in | Experiments, side projects and things that may explode |
| status.codeopen.in | Uptime and health of everything hosted here |
TO START A PROJECT, VISIT PORTFOLIO.CODEOPEN.IN AND USE THE CONTACT SECTION.
VISITORS SINCE JANUARY 1995