• Designed and shipped two full-stack platforms, Hazira and Teamrail, using Node.js, NestJS, TypeScript, and Angular, from system design to production rollout.
• Set up Kubernetes on DigitalOcean with Docker and Helm charts, so deployments were repeatable and stayed highly available.
• Led the backend for the Stripe and SSLCommerz payment integrations and for event-driven services on AWS SQS, Lambda, and Redis.

Tech Stack: Node.js, NestJS, TypeScript, Angular, Docker, Kubernetes, Helm, DigitalOcean, Stripe, AWS SQS, Lambda, Redis

Multi-Technology Enterprise Applications

• Designed and led the migration of legacy monoliths to cloud-native microservices for 40 million users, written as high-throughput Node.js, NestJS, and Go services.

Banglalink Identity Access Management (BL-IAM)

• Designed BL-IAM, the identity and access management system for a multi-tenant telecom platform, using JWT, OAuth2, and API Gateway patterns.
• Implemented network login, so a user on a Banglalink SIM is signed in automatically over the mobile network. The API Gateway confirms the request is on-network and passes the MSISDN in a trusted header to the multi-tenant IAM. The IAM signs a per-tenant hash and issues a short-lived JWT, which the tenant client verifies.
• NodeJS, NestJS, TypeScript microservices architecture
• MySQL with TypeORM for data persistence and relationships
• RabbitMQ for event-driven messaging and microservices communication
• Docker containerization with automated deployment workflows
• Impact: Identity and access for 40 million users

Go Lang JWT Authorizer Service

• Wrote a Go JWT authorizer that verifies tokens across distributed services behind Nginx authorization routing. In production, it handles millions of authorization requests.
• Go Lang microservice for distributed JWT token verification
• High-performance concurrent processing handling max API request loads
• Nginx integration with custom authorization routing configuration
• Load distribution architecture reducing authentication overhead

Data Sync Worker

• NodeJS and NestJS with TypeScript for type-safe development
• Redis with Bull Queue for reliable background job processing
• Legacy system integration synchronizing old auth with new IAM
• Automated data migration with consistency validation and error handling

Banglalink Bonus Disbursement Service (RnE)

• Built the bonus disbursement service and related services for high-volume customer rewards, on Node.js, NestJS, TypeScript, MySQL, TypeORM, and RabbitMQ.
• NodeJS, NestJS, TypeScript backend with cluster management
• MySQL database with complex business logic and transaction handling
• RabbitMQ messaging for reliable bonus processing workflows
• Automated containerization reducing deployment complexity

DXP - Digital Experience Platform

• PHP Laravel backend with comprehensive RESTful API development
• React frontend with TypeScript and Tailwind CSS styling
• MySQL database with optimized queries and proper indexing
• Docker deployment with automated build and release processes

bKash Payment Gateway Integration

• PHP Laravel middleware for secure payment processing
• Webhook handling with HMAC signature verification and retry logic
• Database transaction logging with automated reconciliation reports
• Error handling and monitoring for payment failure scenarios

MyBL Wallet (Go Lang PoC)

• Go Lang backend for retailer wallet proof of concept
• API development with database integration and transaction management
• Performance testing and concurrent user simulation

MyBL Product Inventory

• NodeJS, NestJS, TypeScript backend with MongoDB integration
• React frontend with TypeScript for type-safe component development
• Real-time features using WebSocket connections for live updates

Technical Leadership Achievements

• Containerized 9 mission-critical applications with Docker and Kubernetes, which cut deployment time by 75%. Also set up distributed caching and messaging with Redis and RabbitMQ.
• Mentored 8+ engineers and pushed for code review and test-driven development (TDD).
• Containerized 9 production applications across multiple technology stacks
• Implemented distributed caching and messaging with Redis and RabbitMQ

Tech Stack: NodeJS, NestJS, TypeScript, PHP, Laravel, Go Lang, React, Angular, Python, MySQL, MongoDB, Redis, Docker, Kubernetes, AWS

DevSuite SaaS Products

• Delivered 3 SaaS products under the DevSuite name, using React, Node.js, TypeScript, and PostgreSQL.
• Delivered 3 SaaS products (DevSuite Showcase, Remote, and Project) using React, Node.js, TypeScript, and PostgreSQL
• React with TypeScript and Tailwind CSS for responsive frontends
• Firebase authentication with custom React hooks implementation
• GCP and Kubernetes with Infrastructure as Code and CI/CD

Key Achievements

• Cut API latency by about 60% by tuning backend queries and indexes.
• Looked after the cloud infrastructure on GCP and Kubernetes, including Infrastructure as Code and CI/CD.
• Cross-timezone collaboration with Australian team using async communication

Tech Stack: React, Node.js, TypeScript, PostgreSQL, Tailwind CSS, Firebase, GCP, Kubernetes

Vue.js & Python Applications

• Built the analytics and data pipelines for Canpath with Vue.js, Node.js, Python, PostgreSQL, and Kubernetes on GCP.
• Canpath Analytics: Vue.js frontend with Node.js Express backend
• Python data processing with PostgreSQL database optimization
• TilR Application: Python Django with advanced ORM usage
• Google Cloud Platform deployment with Docker and Kubernetes
• RESTful API development following OpenAPI specification standards

Technical Contributions

• Improved ingestion throughput for large datasets and deployed services on GCP
• Kubernetes deployment with auto-scaling and load balancing
• Python API integration with complex data transformation pipelines
• Performance monitoring and logging implementation

Tech Stack: Vue.js, Node.js, Python, Django, PostgreSQL, Docker, Kubernetes, GCP

React Native & Angular Gaming Platform

• Lead engineer on AllezPadel, a social and tournament platform I built from scratch with NestJS, Node.js, TypeScript, GraphQL, and MongoDB.
• Added real-time features with Socket.io and ran AWS DocumentDB.
• AllezPadel React Native mobile application (team leadership)
• NodeJS, NestJS, TypeScript backend with GraphQL API development
• MongoDB with complex aggregation pipelines for gaming statistics
• Angular admin dashboard with TypeScript and real-time charts

Leadership & Architecture

• Led 5-person development team across mobile and web technologies
• Designed GraphQL schema for efficient mobile data consumption
• Implemented WebSocket communication for real-time game state sync
• MongoDB optimization for high-frequency gaming data updates

Tech Stack: React Native, NodeJS, NestJS, TypeScript, GraphQL, Angular, MongoDB, Socket.io, AWS DocumentDB

MyCareerGate

• Led MyCareerGate, a talent-pooling platform with a TypeScript and Angular frontend on a microservices backend.
• MyCareerGate: microservices backend with Angular frontend
• TypeScript development with Angular services and reactive forms
• MongoDB integration with comprehensive data modeling
• RESTful API development with Node.js

Enterprise Contributions

• Microservices architecture design and implementation
• Database optimization and complex query development
• A/B testing integration with Optimizely and Adobe Target

Tech Stack: Angular, TypeScript, Node.js, MongoDB, JavaScript, AWS

Angular & TypeScript Enterprise Applications

• Built the audio and video player features for the JamAHook music platform on Node.js, MongoDB, and AWS.
• Designed reusable Angular component libraries.
• JamAHook Music Platform: JavaScript audio processing with AngularJS
• Angular component library development for reusable UI elements
• A/B testing integration with Optimizely and Adobe Target

Tech Stack: Angular, TypeScript, AngularJS, Node.js, MongoDB, JavaScript, AWS

NodeJS & Analytics Development

• Built a time-tracker application and an A/B testing analytics tool with Node.js, Express, and MongoDB.
• Integrated Optimizely and Adobe Target to analyze conversion rates.
• Time Tracker Application: NodeJS, Express with MongoDB integration
• Optimizely, AB Tasty, Adobe Target integration and custom modules
• Performance optimization and conversion rate analysis

Tech Stack: NodeJS, Express.js, MongoDB, JavaScript, Analytics Platforms

Courses - Mathematics, Physics, Chemistry

Courses - Mathematics, Physics