Md. Maniruzzaman

Sr. Fullstack Developer & Team Lead

Leading teams to deliver scalable, high-performance applications with 13+ years of full-stack expertise

About Me

Professional Summary

I design and build scalable SaaS platforms and enterprise-grade applications. With 15+ years of experience in full-stack development, I specialize in system architecture, microservices, and performance-driven engineering. I focus on building systems that are maintainable, scalable, and optimized for long-term growth.

🏗️ Architecture & System Design

  • • Scalable System Design (Monolith → Microservices)
  • • Clean Architecture & Domain-Driven Design (DDD)
  • • SOLID Principles & Design Patterns
  • • Event-Driven Architecture
  • • REST & GraphQL API Design
  • • Real-time Systems (WebSockets)
  • • Multi-tenant SaaS Architecture
  • • Performance Optimization & Caching
  • • SEO-Optimized SSR Applications

🚀 Backend Engineering

  • • Node.js (Express.js, NestJS)
  • • Go (Golang)
  • • PHP (Laravel, Yii)
  • • Microservices & Distributed Systems
  • • Authentication & Authorization (JWT, RBAC)
  • • Background Jobs & Queue Systems
  • • API Gateway Patterns
  • • Scalable Backend Infrastructure

🎨 Frontend Engineering

  • • React.js
  • • Next.js (App Router, SSR, ISR)
  • • TypeScript
  • • State Management (Redux, Zustand)
  • • Component-driven Architecture
  • • Tailwind CSS, Bootstrap
  • • Design Systems
  • • W3C AAA Accessibility

🗄️ Database & Data Layer

  • • PostgreSQL
  • • MySQL
  • • MongoDB
  • • Data Modeling & Schema Design
  • • Query Optimization & Indexing
  • • ORM: Prisma, Sequelize, Eloquent
  • • Data Caching Strategies

☁️ DevOps & Cloud

  • • AWS (EC2, S3, CloudFront, Amplify, Lambda)
  • • Docker & Containerization
  • • CI/CD (GitHub Actions, AWS CodeBuild)
  • • Nginx & Reverse Proxy
  • • Linux Server Administration

🔥 What I Focus On

  • • Clean, maintainable, scalable code
  • • Designing systems, not just features
  • • High-performance applications
  • • Long-term architecture
  • • Developer experience & code quality
  • • Performance & SEO optimization

📂 Selected Work Areas

AI-based Offer Generation Platforms
Real-time Task & Workflow Systems
Multi-tenant SaaS Applications
Enterprise Admin Panels
Cloud-based Product Platforms
High-Traffic Web Applications

Education

Bachelor of Science (BSc) in Computer Science - London Metropolitan University

Experience Highlights

  • InfinitiBit, GmbH - Sr. Software Engineer & Team Lead (Dec 2024 - Present)
  • Wunderman Thompson Studios - Sr. Software Engineer & Team Lead (Feb 2024 - Dec 2024)
  • Apsis Solutions Ltd - Sr. Software Engineer & Team Lead (Aug 2022 - Jan 2024)
  • Sitback Solution - Web Developer Remote (Feb 2021 - Jan 2022)
  • Top Rated Upwork Freelance - Full-stack Developer (Feb 2014 - Jan 2022)

Core Tech Stack

React.js
Next.js
Node.js
Express.js
NestJS
Go/Golang
PHP
Laravel
TypeScript
JavaScript
PostgreSQL
MySQL
MongoDB
Prisma
REST API
GraphQL
AWS
React Native
Redis
Docker

Portfolio

Kossti - Product Review Platform

Production App

A comprehensive product review and comparison platform for Bangladesh. Supports 9+ product categories (cars, laptops, motorcycles, mobile phones, banking, etc.) with multi-language interface (Bengali/English) and user review system.

Tech Stack

Next.jsGo/GolangPostgreSQLREST APIMulti-language Support

Key Achievements

  • Built full-stack platform with Next.js frontend and Go backend APIs
  • Implemented multi-language interface supporting Bengali and English with seamless switching
  • Designed PostgreSQL schema for product categories, reviews, ratings, and user management

Readers' Favorite - Book Review Platform

Production App

Largest independent book review and award contest platform serving indie authors, publishers, and readers since 2009. Features 10K+ reviewed books across 150+ genres with user accounts, award contests, and reviewer systems.

Tech Stack

PHPYii FrameworkBootstrapMySQLAdmin Dashboard

Key Achievements

  • 18+ years in operation serving authors, publishers (Penguin Random House, Simon & Schuster, HarperCollins)
  • Built multi-role system: authors, reviewers, affiliates, publishers with unique dashboards
  • BBB A+ accredited with 10K+ reviews across 150+ genres and award contest management

Enterprise Automated BID Management Platform

Enterprise Application (Private)

Developed and deployed an enterprise-grade automated bidding platform for a Fortune 500 energy company that streamlines the procurement process for global operations. The platform automates bid generation, evaluation, and tracking, reducing procurement time from weeks to days.

Tech Stack

Next.jsNestJSTypeScriptPostgreSQLRedisAWSWorkflow EngineDocument Processing

Key Achievements

  • Built workflow automation engine processing 1000+ bids monthly across 50+ categories
  • Reduced procurement cycle from 3 weeks to 2-3 days with automated bid evaluation
  • Integrated with ERP systems for real-time supplier and inventory data synchronization
  • Implemented role-based access control with audit trails for compliance (SOX, GDPR)
  • Achieved 99.9% uptime SLA supporting concurrent operations across multiple regions

British American Tobacco CRM Platform Migration

Architecture & Leadership

Led the complete migration and optimization of a critical CRM platform for British American Tobacco (BAT) from PHP Laravel to modern NestJS backend with Next.js frontend. Redesigned database architecture for 10x performance improvement and managed cross-functional team delivery.

Tech Stack & Architecture

NestJSNext.jsTypeScriptPostgreSQLRedisDockerMicroservicesGraphQL

Challenge

Legacy PHP Laravel CRM system faced critical issues: slow query performance (5-10s response times), inability to handle concurrent users, and difficult to scale infrastructure. BAT needed a modern, high-performance CRM for their global operations.

Solution & Leadership

Led migration to NestJS backend and Next.js frontend with comprehensive database optimization:

  • Redesigned database schema for optimal query performance with strategic indexing
  • Implemented Redis caching layer for frequent queries and session management
  • Built microservices architecture for independent scalability
  • Migrated 500K+ customer records with zero data loss
  • Established CI/CD pipeline with Docker containerization
  • Mentored team through migration process and modern stack adoption

Results & Impact

  • Query response time: 8s → 200ms (40x improvement)
  • Concurrent users: 50 → 10,000+ without performance degradation
  • Page load time: 3s → 400ms (7.5x faster)
  • Infrastructure cost reduced by 60% with optimized resource usage
  • Team velocity increased 3x with modern development tools
  • System uptime: 99.99% SLA vs 95% on legacy system

Note: This is a private, enterprise application and is not publicly available.

Upwork Testimonials

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Let's Connect

I'm always interested in hearing about interesting projects and opportunities. Feel free to reach out!