About
13+
Years of
Experience
25+
Engineers
Led
4
Global
Teams

I'm a Principal Full-Stack Engineer and Tech Lead with 13+ years of experience building, scaling, and maintaining production-grade web and backend systems.

Deep expertise in React, Next.js, Node.js, and Web3/blockchain. I've owned complex systems end-to-end — from architectural decisions to production rollouts — equally comfortable as IC or leading a distributed team.

Currently leading four engineering teams (~25 engineers globally) at Cosmos Tech Labs as an offshore partner for a Phoenix-based startup. Previously Frontend Tech Lead at Rakuten Japan (Offshore Contract) and full-stack team lead at BJIT Ltd.

When I'm not building software, you'll find me tending to my mango farm back home in Bangladesh. 🥭

Experience
2022 —
Present
Principal Software Engineer
Cosmos Tech Labs LTD · Dhaka, Bangladesh

Lead four global engineering teams (~25 engineers) as offshore partner for a Phoenix-based startup. Own system architecture, define service boundaries and data models, and drive hands-on implementation of production-grade web and backend systems.

React.jsNext.jsTypeScriptNode.jsWeb3System DesignSystem ArchitectureTeam LeadershipTeam Management
2021 —
2022
Tech Lead — Frontend
Rakuten · Japan (Remote, Contract)

Frontend tech lead at one of Japan's largest tech companies. Drove front-end architecture, established development standards, and delivered high-quality user interfaces at scale.

React.jsNext.jsTypeScriptSystem ArchitecturePerformanceLeadership
2017 —
2021
Tech Lead & Technical Project Manager
BJIT Ltd · Dhaka, Bangladesh

Led a 13-engineer full-stack team across multiple client projects. Developer, tech lead, and technical PM. Responsible for code quality, architectural reviews, and shipping complex software across 4+ years.

React.jsNext.jsNode.jsTypeScriptSystem DesignSystem ArchitectureProject ManagementTeam LeadershipTeam Management
2013 —
2017
Senior Software Engineer — Full Stack
LoloByte · Dhaka, Bangladesh

Built and maintained production full-stack web applications over four years. Developed foundational expertise in architecture, system design, and delivering software across diverse client requirements.

Vue.jsNuxt.jsJavaScriptFull StackREST APIs
Get Full CV
Core Skills
Frontend
  • React & Next.js
  • TypeScript / ES6+
  • Vue.js & Nuxt.js
  • Performance Optimization
  • Web3 UX & Wagmi
Backend
  • Node.js (expert)
  • Express.js
  • REST API Design
  • Auth & Access Control
  • Async & Job Queues
Blockchain
  • Ethereum & EVM
  • ERC-20 Token Systems
  • NFT Standards
  • Wallet Architecture
  • On-chain Indexing
Architecture
  • Scalable SaaS Design
  • Microservices & Monoliths
  • Event-Driven Systems
  • Data Modeling
Infrastructure
  • AWS
  • MongoDB & Firebase
  • CI/CD Pipelines
  • Playwright (Testing)
  • HTML5 & CSS3
Leadership
  • Engineering Team Lead
  • Architectural Reviews
  • Technical Project Mgmt
  • Stakeholder Management
  • Mentorship & Code Reviews
Selected Domains
Financial & Web3 Platforms

Transaction-heavy systems with multi-wallet architectures, ERC-20 operations, and real-time on-chain data — built with data integrity and security at every layer.

Creator & Fan Engagement

Fanverse-style creator platforms with real-time interactions, content gating, and monetization pipelines for high-concurrency user flows.

Asset & Transaction Monitoring

Decoupled event-driven architectures for blockchain data services — monitoring token transfers, transaction status, and NFT activity.

SaaS APIs with Tiered Access

RESTful SaaS platforms with free/paid tiers, robust auth flows, rate limiting, and modular boundaries built for long-term maintainability.