Chandan Gupta
Node.js · TypeScript · API integrations · Cybersecurity
About
I'm a backend-focused full stack developer with 4+ years of professional experience building and supporting production systems with Node.js, TypeScript, Express, MongoDB, REST APIs, and webhooks.
I work at the intersection of backend engineering and cybersecurity. My work includes secure messaging workflows, threat-intelligence tooling, and integrations with Meta WhatsApp Business API, Google Calendar, Razorpay, OpenAI, and MISP.
Experience
Projects
WhatsApp Cybercrime Assistance Bot
Built and operated a Node.js system for cyber-incident reporting and responder workflows involving sensitive citizen data. Integrated Meta webhooks directly, Google Calendar scheduling, Razorpay callbacks, and operational logging.
- Node.js
- Meta API
- MongoDB
- Webhooks
- Razorpay
IOC Extractor Chrome Extension
A threat-intelligence tool that detects IPv4 addresses, MD5 hashes, and SHA-256 hashes on web pages, then submits indicators to MISP for security research workflows.
- JavaScript
- Chrome Extension APIs
- MISP
B2B WhatsApp SaaS Platform
Completed multi-tenant MCA project where businesses connect their own Meta WhatsApp Business API credentials through a bring-your-own-key model, with APIs for messaging workflows and webhook handling.
- Node.js
- Express
- MongoDB
- Meta WhatsApp Business API
Skills
Languages
- JavaScript (ES6+)
- TypeScript
- SQL
Backend
- Node.js
- Express.js
- REST APIs
- Webhooks
- Background Jobs
Frontend
- React
- Next.js
Databases
- MongoDB
- MySQL
Infrastructure
- Linux
- Nginx
- Docker
- AWS EC2
- AWS S3
- Git
Integrations
- Meta WhatsApp API
- Google Calendar API
- OpenAI API
- Razorpay
- MISP
"Building things properly matters more than quick fixes."