Hello, I am

MD. Rezaul Karim

Lead Software Engineer | Spring Boot | Ruby on Rails | AWS

Who am I ?

Lead Software Engineer & Full-Stack Developer

Lead Software Engineer at Liberate Labs BD with 6+ years of experience in various SDLC phases such as requirements gathering, analysis, design, implementation, deployment, and testing of Client/Server and Web applications. Experience in developing Web applications using Spring Boot and Ruby on Rails, HTML5, CSS3, jQuery, JavaScript, React JS, and MySQL, PostgreSQL. Demonstrated ability to satisfy upper management through reliability, commitment, and problem resolution.

Personal Info

  • Birthdate : 16/06/1997
  • Email : rksazid@gmail.com
  • Phone : +88 01521453995
  • Skype : rksazid
  • Address : Dhaka, Bangladesh.

My Expertise

Full-Stack Web Development

Custom web application development with Spring Boot, Ruby on Rails, and modern JavaScript frameworks

Cloud Infrastructure & DevOps

AWS cloud solutions, Docker containerization, CI/CD pipelines, and scalable server architecture

Microservices & System Architecture

Designing scalable microservices architecture, system design, and leading development teams

My Resume

Experiences

May 2025 - Present
Lead Software Engineer at Liberate Labs BD

Working on US-based Ed-Tech company "Bullseye Education" web application revamp
Technologies: Spring Boot, Ruby on Rails, AWS

January 2024 - May 2025
Lead Software Engineer at RedDot Digital Limited

Web Application Development
Technologies: Spring Boot, Ruby on Rails

July 2023 - January 2024
Senior Software Engineer at Nascenia Ltd.

Full-stack Web developer
Framework: Ruby on Rails

Jan 2021 - June 2023
Software Engineer at Nascenia Ltd.

Full-stack Web developer
Framework: Ruby on Rails

Mar 2019 - Dec 2020
Junior Software Engineer at Nascenia Ltd.

Full-stack Web developer
Framework: Ruby on Rails

Education

2014 - 2019
B.Sc. in Computer Science & Engineering at Khulna University of Engineering & Technology (KUET)
CGPA: 3.42/4.00
2012 - 2014
H.S.C, Science at Khulna Kamil Madrasah
Grade: GPA 5

Skills

Spring Boot, Ruby on Rails, JavaScript, React.js, Microservices
PostgreSQL, MySQL, Redis, MongoDB
Docker, Kubernetes, CI/CD, Git
AWS (EC2, S3, Lambda, RDS), Heroku, DigitalOcean

Send a message

Get in touch

Phone:
+88 01521-453995
Address:
Dhaka, Bangladesh
Email:
rksazid@gmail.com