Available for select work

Dhaka, Bangladesh

Sabbir.Full-Stack Developer

I build fast, secure, and beautifully crafted interfaces with Next.js and TypeScript — from the database to the last pixel.

2+
years building
15+
products shipped
3
phases on Currents alone

01 — Profile

A developer who sweats the details.

I'm a full-stack developer who builds fast, secure, and genuinely nice-looking products — from the database up to the last pixel.

My work lives in Next.js and TypeScript, backed by MongoDB and Node. I care about the details most people skip: hydration, rate limiting, focus states, and the way a page feels the moment it loads.

Lately I've been building indie products for the Bangladeshi market and sharpening the edges on security and UX.

Next.js/TypeScript/React/MongoDB/Tailwind CSS/NextAuth/Framer Motion/Node.js/FastAPI/Chrome MV3/Mapbox GL/Security/Next.js/TypeScript/React/MongoDB/Tailwind CSS/NextAuth/Framer Motion/Node.js/FastAPI/Chrome MV3/Mapbox GL/Security/

02 — Selected Work

Things I've built.

A mix of production SaaS, on-device AI experiments, and internal tools — each shipped end-to-end.

01
Real-time · Chat

Seylo

A real-time chat application with one-to-one and group messaging, built for speed and a clean, modern messaging experience.

Live messaging over WebSockets with typing indicators, read receipts, online presence, and media sharing — backed by MongoDB and secured with NextAuth. My most-invested project to date.

Next.jsTypeScriptSocket.IOMongoDBNextAuthTailwind
02
SaaS · FinTech

Currents

A multi-currency personal finance tracker with production-grade security hardening across ten build phases.

Email verification, password reset, session invalidation, rate limiting, CAPTCHA, CSP/HSTS, CSRF via Web Crypto, soft-delete, TOTP 2FA with backup codes, and full audit logging — plus a complete marketing and legal site.

Next.js 15MongoDBNextAuthUpstashTurnstileResendSentry
03
Chrome Extension · On-device AI

Read or Skip

A Chrome MV3 extension that turns any YouTube video into a 10-second WATCH / SKIM / SKIP verdict — at zero infra cost.

Uses on-device Gemini Nano and YouTube's caption endpoints with a three-fallback transcript pipeline, streaming output into a stable two-slot DOM render, cached for 30 days via chrome.storage.local.

MV3Gemini NanoStreamingCaching
Case study on request
04
Web App · AI

ID Photo

An AI-powered ID photo studio with 30+ international document presets and one-tap background removal.

Custom background color picker, PNG/JPG export toggle, and a self-managing footer architecture on the frontend, with a FastAPI backend wrapping the remove.bg API.

ReactFastAPIremove.bgCanvas
05
Civic · Maps

Ramadan Bazar Dorরমজান বাজার দর

A Bengali market-price mapping app that crowdsources daily grocery rates onto an interactive map.

Mapbox GL JS with a draggable mobile bottom sheet and a floating-action-button pin-drop picker — built mobile-first for real market use.

Next.jsMapbox GLBengali UXGeolocation
06
Internal Tool · Security

Domain Guard

A domain-allowlist enforcement system for a 40-person team, spanning browser, server, and desktop.

A Chrome extension, an Express/MongoDB backend, a Next.js admin panel, and a Windows Go service with a system-tray app and local DNS resolution — shipped through five iterative versions.

Chrome ExtExpressMongoDBGoNext.js
Case study on request

03 — The Stack

Tools I reach for.

Deep in the JavaScript ecosystem, with enough range across the stack to own a product from schema to ship.

Frontend

01

where the product meets the person

  • Next.js
  • React
  • TypeScript
  • Tailwind CSS
  • Framer Motion
  • Radix / shadcn

Backend

02

the part users never see but always feel

  • Node.js
  • Express
  • MongoDB
  • Mongoose
  • NextAuth
  • FastAPI

Platform & Infra

03

shipping it safely, keeping it up

  • Vercel
  • Upstash
  • Sentry
  • Resend
  • Cloudflare
  • Git / GitHub

Edges

04

the specialties that set the work apart

  • Chrome Extensions (MV3)
  • On-device AI
  • Mapbox GL
  • Security hardening

04 — Experience

Where I've worked.

  1. Bitsec

    Earlier

    Full-Stack Developer

    Worked as a Full-Stack Developer, building modern web applications with Next.js and TypeScript. Developed portfolio websites for educational institutes, internal company platforms, and full-stack solutions with responsive UIs, secure APIs, and optimized performance.

  2. NeXbit LTD

    Ongoing

    Full-Stack Developer

    Building internal tools, analytics dashboards, and SaaS features in Next.js and TypeScript — attendance, payroll with bulk payslips, and sales reporting with a consistent premium design system.

05 — Education

Where I studied.

2021 — 2022

Hogla Betka Secondary School

Secondary School Certificate (SSC)

Completed secondary education while developing a strong interest in technology, problem-solving, and web development.

2023 — 2024

Uttara Govt. College

Higher Secondary Certificate (Humanities)

Completed higher secondary education in the Humanities group while independently mastering modern web development through self-learning and the Programming Hero bootcamp.

06 — Contact

Have a project in mind?

I'm open to freelance work, product collaborations, and interesting full-time roles. Tell me what you're building and I'll get back within a day or two.