Hi, I'm Md. Mustaqim Khan
I craft scalable, high-performance web apps with modern technologies like Next.js, TypeScript, Node.js, and MongoDB.
About Me
I’m a Full Stack Developer specializing in building robust, scalable web apps using the latest technologies. Over the past two and half years, I’ve developed platforms across eCommerce and Saas domains — optimizing performance, improving UX, and architectures like Next.js and Node.js.
My approach combines technical depth with a product-first mindset. I don't just write code; I build solutions that solve real business problems and delight users.
Frontend
React, Next.js, TypeScript, Redux.js, Tailwind CSS
Backend
Node.js, Express, NestJS, PostgreSQL, MongoDB
DevOps
Docker, AWS, CI/CD (GitHub Actions)
Others
REST APIs, GraphQL, Prisma, Socket.io
Professional Experience
MERN Stack Developer
Sep 2023 – Jul 2026
2 yrs 11 mos
Flex SoftrFreelance
Dhaka, Bangladesh · Remote
Designed and built production-grade e-commerce systems and SaaS products as a freelance MERN stack developer.
- Built brmartbd.com admin dashboard (Next.js 15, Redux Toolkit, RBAC, schema-driven payments).
- Built norabd.com full-stack — custom Node.js engine replacing WooCommerce, 15+ state order workflow.
- Built siddikiaprokashoni.com book-selling platform from scratch with blog, Q&A, and SEO.
- Delivered performance & SEO overhaul for friendstelecom.com.bd — Lighthouse 57 → 90+.
Frontend Developer
May 2025 – Oct 2025
6 mos
BRtechFull-time
Dhaka, Bangladesh · Remote
Worked full-time building frontend features for internal and client-facing products.
- Developed and maintained React/Next.js frontends for multiple product lines.
- Collaborated with backend teams to integrate REST APIs and improve data-fetching patterns.
- Built skilloxygen.com — two-sided interview booking marketplace with slot management and booking lifecycle.
Featured Projects
A selection of projects that demonstrate my technical depth and architectural thinking.
friendstelecom.com.bd — Performance & SEO Overhaul
Hired as a senior-level expert to rescue a struggling e-commerce site. Lifted the Lighthouse Performance score from 57 to 90+ and achieved a 100/100 SEO score on both Mobile and Desktop. Overhauled ISR for 2,000+ products, fixed Core Web Vitals (LCP & CLS), and hardened technical SEO end-to-end.
Key Highlights
- Lighthouse Performance: 57 → 90+ on mobile & desktop
- ISR implementation for all product pages with sub-200ms API response
- Full technical SEO audit — JSON-LD schema, canonical tags, sitemap
- WebP/AVIF image serving with lazy loading across all product images
- MongoDB query indexing for efficient data fetching via TanStack Query
- Mobile-responsive UI rebuild for Core Web Vitals compliance
norabd.com — E-commerce Storefront + Node.js Backend
Built both frontend and backend from scratch. Replaced WooCommerce with a custom Node.js engine to handle complex product variations and a 15+ state order workflow with atomic inventory locking, courier integration, partial returns, and PDF invoices.
Key Highlights
- 15+ state order workflow with atomic inventory locking
- Complex product variation engine replacing WooCommerce
- Courier integration and partial return handling
- PDF invoice generation on order lifecycle events
brmartbd.com — SaaS E-commerce Admin Dashboard
Built the frontend for a multi-tenant SaaS admin dashboard. Covers variable product & SKU management, full order lifecycle with invoicing, RBAC, and schema-driven custom payment methods (bKash etc.) where new methods can be added without touching code.
Key Highlights
- Variable product & SKU management with dynamic pricing
- Full order lifecycle with PDF invoicing
- Schema-driven payment methods — add bKash, Nagad etc. without code changes
- Role-based access control (RBAC) across all dashboard modules
siddikiaprokashoni.com — Book-selling E-commerce Platform
Built the entire system from scratch — tailored for the Bangladeshi market. Covers product & order management, blog, Q&A, and SEO, all purpose-built around local needs and workflows.
Key Highlights
- Full product & order management system built from scratch
- Integrated blog and Q&A modules for content marketing
- SEO-first architecture targeting the Bangladeshi book market
- Designed and implemented the entire system end-to-end
skilloxygen.com — Interview Booking SaaS
Built the full frontend for a two-sided marketplace connecting candidates with verified experts. Features slot booking with no double-booking logic, state-driven booking lifecycle, verified expert profiles, and a structured post-session feedback system.
Key Highlights
- Slot booking with conflict-free double-booking prevention
- State-driven booking lifecycle management
- Verified expert profile system with review gating
- Structured post-session feedback and rating system
Technical Skills
Frontend
Backend
Database
DevOps & Tools
Let's build something great together.
I'm currently available for freelance projects and open to full-time opportunities. If you have a project in mind or just want to say hi, feel free to reach out!