Tech Lead &
Full-Stack Developer
Currently leading a development team at ewynk, I build scalable, performant web applications using React, Next.js, and Node.js. I love transforming complex problems into clean, maintainable solutions.
Years Experience
Experience as a Full-Stack Developer and Tech Lead, building scalable web applications with modern Frontend and backend technologies.
Client's Projects
Successfully delivered responsive websites, SaaS platforms, automation systems, AI-powered posture analysis tools, dashboards, and visual editors for clients and startups.
Hours Available
Manikganj, Dhaka
Bangladesh
sabbirchowdhury40854@gmail.com
whatsapp: 01617837797
Your Next Tech Leader -
Building scalable products with clean design & strong engineering.
I'm Sabbir Chowdhury, a Tech Lead and Full-Stack Developer From Bangladesh with experience building scalable SaaS platforms, AI-powered systems, and modern web applications that focus on performance, usability, and real-world impact.
I specialize in React, Next.js, TypeScript, and Node.js – crafting responsive interfaces, robust backend architectures, and seamless user experiences with modern technologies and clean development practices.
Beyond coding, I lead development teams, mentor developers, and turn complex ideas into production-ready products. I enjoy building systems that are not only scalable and fast, but also intuitive and genuinely useful.
Reputation
10+ successful projects delivered — SaaS platforms, AI tools, automation systems, dashboards, and visual editors for clients and startups.
Tech Leadership
Lead dev teams, mentor juniors, review 20+ PRs/week, and drive sprint planning for on-time delivery.
Full-Stack Expert
React, Next.js, Node.js, TypeScript, PostgreSQL, AWS — from UI to API to deployment.
SERVICES
Services Provide
Comprehensive development solutions from concept to deployment, delivering quality products that solve real-world problems.
Web Development
Building responsive, high-performance web applications using React, Next.js, and modern frontend technologies with clean, maintainable code.
Mobile App Development
Creating cross-platform mobile applications with React Native, delivering native-like experiences for both iOS and Android platforms.
UI/UX Design Implementation
Transforming designs into pixel-perfect, interactive interfaces with attention to detail, accessibility, and user experience.
Backend Development
Developing robust REST APIs and backend systems using Node.js, Express, and databases like MongoDB and PostgreSQL.
Cloud Integration
Implementing cloud solutions with AWS S3, Firebase, Supabase for scalable file storage, authentication, and real-time features.
E-commerce Solutions
Building complete e-commerce platforms with payment gateway integration (PayPal, Stripe, Razorpay) and shopping cart functionality.
SKILLS
Technologies I work with
I use modern tools and technologies to build scalable, high-performance web applications and deliver great user experiences.
Frontend
01React.js, Next.js, Redux, Tailwind CSS, ShadCN, Styled-components, Framer-motion
Mobile Development
02React Native, Expo, Mobile UI/UX, Cross-platform Development
Backend
03Node.js, Express.js, Nest.js, REST API, Prisma, JWT, Mongoose
Language
04JavaScript (ES6+), TypeScript
Database
05MongoDB, PostgreSQL
Cloud & Tools
06AWS S3, Firebase, Supabase, Git, GitHub, GitLab, Postman, VS Code, Vercel, Netlify
Payment Integration
07PayPal, Razorpay, Stripe, SSLCommerz
PROJECTS
Featured Projects
Real-world applications I've built — from SaaS platforms to automation tools.
Tigsaw (SaaS Platform)
- Built and optimized full-stack web applications with Next.js, Prisma, and PostgreSQL, improving performance and backend response times by 20%+.
- Designed and implemented responsive UI components using ShadCN, Tailwind CSS, and Framer Motion, improving user experience and consistency.
- Developed 15+ RESTful APIs and integrated payment gateways (PayPal, Razorpay) with upgrade & renewal plans, enabling seamless subscription management.
- Implemented a custom editor like GrapesJS, empowering users to create and manage components without coding.
- Collaborated in Agile workflows (daily stand-ups, sprint planning, code reviews), ensuring timely delivery of high-quality features and reducing bugs by 10%.
Sacchi Sewa (Crowdfunding Platform)
- Built a full-stack crowdfunding platform with Next.js 16 App Router, supporting campaign creation, donation processing, and real-time payment tracking.
- Integrated Cashfree payment gateway with dual payment paths — static UPI QR codes and dynamic checkout popups with webhook-based verification.
- Designed PostgreSQL schema via Prisma ORM with Campaign, Payment, and FundAdjustment models handling deduplication, refunds, and atomic balance updates.
- Implemented AWS S3 image uploads and admin campaign management with Zod-validated API routes and bcryptjs authentication.
- Built responsive animated UI with Tailwind CSS, Framer Motion, shadcn/ui, and TipTap rich-text editor — including donation popups and contributor leaderboards.
RemoveQ (Analytics Platform)
- Implementing authentication system with Supabase Auth, enabling secure user login, registration, and session handling.
- Building a modern dashboard UI with beautiful loading states and smooth frontend interactions.
- Developing file upload & storage features (images, videos, documents) using AWS S3 for scalability and reliability.
- Debugging and optimizing file/image upload flows, improving performance and reducing errors.
- Contributing to continuous enhancements by bug fixing, refining UI/UX, and adding new features in collaboration with the product team.
Binance P2P Automation
- Built a full-stack admin dashboard in Next.js 16 (App Router, TypeScript) with Tailwind CSS & shadcn/ui to manage Binance P2P trading operations, featuring real-time order syncing, user management, and trading analytics.
- Implemented a multi-provider KYC/AML verification engine integrating Signzy, Deepvue, Surepass, and HyperVerge APIs with automatic fallback chains — including OCR-based Aadhaar/PAN extraction with OpenAI GPT fallback.
- Designed a risk assessment decision system with 30+ rules across identity verification, mule checks, and AML screening, computing risk bands (low/medium/high) and overall KYC status (verified/failed/manual_review).
- Developed a custom HMAC-SHA256 signed Binance C2C API integration with pagination, batch upsert via Prisma transactions, and a webhook receiver for real-time order ingestion into PostgreSQL.
- Built session-based admin authentication (bcrypt, httpOnly cookies) with role-based access (ADMIN/READ_ONLY), and a responsive UI featuring collapsible sidebar, CSV export, date-range filtering, and dark mode support.
EXPERIENCE
My Professional Journey
A timeline of my experience, roles, and the impact I've made across teams and projects.
Tech Lead
EYWINK — REMOTE
- Leading a 3-member development team, managing sprints and reviewing 20+ pull requests weekly.
- Built an AI-powered posture analysis platform using MediaPipe.
- Automated Binance P2P operations saving 6-7 hours/day.
- Mentored 3 junior developers reducing feature delivery time by ~25%.
Tech Lead
EYWINK — REMOTE
- Leading a 3-member development team, managing sprints and reviewing 20+ pull requests weekly.
- Built an AI-powered posture analysis platform using MediaPipe.
- Automated Binance P2P operations saving 6-7 hours/day.
- Mentored 3 junior developers reducing feature delivery time by ~25%.
Full-Stack Web Developer
REMOVEQ TECHNOLOGY PVT. LTD. — REMOTE (INDIA)
- Built 30+ reusable UI components and developed 15+ RESTful APIs.
- Integrated PayPal & Razorpay payment gateways.
- Pioneered a no-code visual editor that reduced manual design efforts by 80%.
- Integrated Supabase Auth and built a scalable AWS S3 file storage system.
Full-Stack Web Developer
REMOVEQ TECHNOLOGY PVT. LTD. — REMOTE (INDIA)
- Built 30+ reusable UI components and developed 15+ RESTful APIs.
- Integrated PayPal & Razorpay payment gateways.
- Pioneered a no-code visual editor that reduced manual design efforts by 80%.
- Integrated Supabase Auth and built a scalable AWS S3 file storage system.
Web Development Course (Level 1 & 2)
PROGRAMMING HERO
- Built a strong foundation in full-stack development.
- Mastered React, Next.js, Redux, Node.js, Express, MongoDB, PostgreSQL, Prisma, and TypeScript.
- Completed structured coursework and practical projects.
Web Development Course (Level 1 & 2)
PROGRAMMING HERO
- Built a strong foundation in full-stack development.
- Mastered React, Next.js, Redux, Node.js, Express, MongoDB, PostgreSQL, Prisma, and TypeScript.
- Completed structured coursework and practical projects.
BSS (Hons)
GOVT. DEBENDRA COLLEGE
BSS (Hons)
GOVT. DEBENDRA COLLEGE
CONTACT
Get In Touch
Have a project in mind or just want to say hi? Fill out the form and I'll get back to you as soon as possible.
sabbirchowdhury40854@gmail.com
Phone
+880 1617 837797
Location
Dhaka, Bangladesh