Hi, I'm Emon Reja

Senior Backend Engineer & AWS Cloud Specialist

Building high-performance, scalable backend systems with 8+ years of experience optimizing databases, APIs, and cloud infrastructure.

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About Me

Professional Summary

Senior Backend Engineer with extensive experience in system optimization, cloud architecture, and database performance tuning. Specialized in transforming slow systems into high-performance applications through strategic refactoring, query optimization, and cloud-native solutions.

Proven track record of reducing system latency by 90%+, cutting operational costs by $50k+/month, and implementing robust CI/CD pipelines. Passionate about mentoring teams and implementing best practices in backend development and cloud infrastructure.

Key Achievements

  • Reduced dashboard load time from 50s to under 2s through query optimization
  • Saved $50,000/month by optimizing payment gateway implementation
  • Improved mutation performance by 70% using asynchronous queues
  • Cut deployment time by 50% through CI/CD automation
  • Optimized SQL queries to make applications 60% faster

Work History

Senior Software Engineer

Programming Hero • Jan 2025 - Present • Remote

Leading backend architecture for educational platform serving millions of users.

Senior Backend Engineer

Softward Bangladesh • Aug 2024 - Dec 2024 • Dhaka

Optimized backend services and implemented scalable cloud solutions.

Senior Software Engineer & AWS Cloud Engineer

Gain Solutions • Oct 2021 - Aug 2024 • Dhaka

Built blockchain analytics dashboard, optimized performance by 96%, implemented payment gateway saving $50k/month.

AWS CDK Developer

Omidnetcare • Jul 2022 - Dec 2022 • Philadelphia

Implemented infrastructure as code using AWS CDK for healthcare platform.

Backend Developer

Ezcorps • Oct 2019 - Oct 2021 • Toronto

Developed HRM solution with ATS from scratch, optimized database performance.

Featured Projects

Blockchain Analytics Dashboard

Reduced load time from 50s to under 2s by optimizing MongoDB queries, adding indexes, and removing nested awaits.

Node.js MongoDB Redis AWS
Code Case Study

Payment Gateway Optimization

Implemented third-party payment processing system with queue-based architecture, saving $50k/month in transaction fees.

Python RabbitMQ AWS Docker
Code Architecture

HRM System with ATS

Built from scratch with optimized database design, reducing query times by 60% and supporting 10k+ concurrent users.

NestJS PostgreSQL GraphQL TypeORM
Code Demo
View All Projects

Technical Skills

Backend

Node.js
Python
Java
NestJS

Database

MongoDB
PostgreSQL
Firebase
Redis

Cloud & DevOps

AWS
Docker
Kubernetes
CI/CD

Other

GraphQL
Security
Performance
Architecture

My Resume

Download my complete resume to learn more about my professional journey, technical expertise, and quantifiable achievements.

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Key Highlights

  • 8+ years of backend development experience
  • Specialized in performance optimization and cloud architecture
  • Reduced system latency by 96% in multiple projects
  • Saved companies $50k+/month through system optimizations
  • AWS Certified with extensive cloud infrastructure experience

Education

Bachelor of Science, Computer Science

Metropolitan University, Sylhet • Dec 2019

Get In Touch

Contact Information

Have a project in mind or want to discuss potential opportunities? Feel free to reach out through any of these channels.