I build fast, secure software for the modern web.
I'm Shubhomoy (Sgdev), a full-stack and AI developer. I work with Python, FastAPI and edge hosting to ship tools that are quick, private and easy to use.
Live right now
Three tools I built and maintain.
S-CaptchaSecurityOnlineSAIAI assistantOnlineVelocity OfficityNetwork toolOnlineSelected projects
Tools I designed, built and run myself.
S-Captcha
A captcha system that needs no database. It layers invisible checks, text challenges and an image honeypot, and rate-limits with hashed IP addresses.
Open projectSAI
A chat app for quick answers, code help and developer support.
Open projectVelocity Officity
A speed and latency test that runs in your browser with no extra dependencies.
Open projectMore on GitHub
Browse the full codebase, experiments and open-source work.
github.com/sgdev-officialWhat I work with
Backend
Python, FastAPI and Flask on Render and Vercel serverless.
Frontend
Semantic HTML, modern CSS and vanilla JavaScript.
Security
HMAC and SHA-256 hashing, rate limiting and bot detection.
Deployment
Vercel, DNS setup, GitHub Actions and scheduled jobs.
Learning by building.
Every project here started as an experiment and grew into something people can use, from a captcha engine to an AI chat app.
I care about performance, clean code and keeping things simple, and I'm always open to technical discussions and API integrations.
Let's build something together.
Email is the fastest way to reach me. I'm happy to talk about collaborations and integrations.