HI, I'M Rezaul Karim
I'm a software engineer specializing in web, mobile ,web3/blockchain and automation apps.
Explore my blog, Projects and online resume.
4+
Years of
Experience
20
Projects
Completed
10
Clients
Worldwide
What I do
I have more than 5 years experience building software for clients all over the world. Below is a quick overview of my main technical skill sets and technologies I use. Want to find out more about my experience? Check out my online resume and Projects.
Javascript, Typescript, Dart, Kotlin
Strong foundation in modern programming languages for web and mobile development, focusing on type safety, performance, and scalable application design.
Reactjs, Nextjs
Building fast, scalable, and SEO-friendly web applications using component-driven architecture, hooks, and server-side rendering.
React Native, Expo, Flutter
Cross-platform mobile app development with native performance, clean UI, and efficient state management for Android and iOS.
Selenium, Puppeteer
Automated testing and browser scripting to ensure application reliability, performance, and consistent user experience.
Solidity, Rust, Nodejs
Backend and blockchain development with a focus on smart contracts, secure APIs, and high-performance server-side logic.
Ether Js, Web3 Js, Remix IDE
Developing, testing, and interacting with Ethereum smart contracts using modern Web3 libraries and developer tooling.
Express Js, Nest Js
Designing scalable REST APIs and backend services with clean architecture, authentication, and modular code structure.
MongoDB, PostgreSQL, MySQL
Working with both SQL and NoSQL databases to design efficient schemas, optimize queries, and manage application data.
Featured Projects
My step-by-step guide ensures a smooth project journey, from the initial consultation to the final delivery. I take care of every detail, allowing you to focus on what you do best.
Crypto Website Development for DeFi X
Testimonials
See how we’ve helped clients turn ideas into successful digital products through thoughtful design, clean code, and reliable performance.
“Working with this developer was a great experience. The project was delivered on time with clean, scalable code and excellent communication throughout.”
Cameron Williamson
India
“They understood our requirements perfectly and built a fast, modern UI that significantly improved our user engagement.”
Sophia Martinez
United States
“Very professional and detail-oriented. The mobile app performance and UI exceeded our expectations.”
Daniel Müller
Germany
“Excellent experience from start to finish. Clear communication, strong technical skills, and reliable delivery.”
Aisha Khan
UAE
“The backend architecture was well-designed and scalable. Would definitely recommend for any serious project.”
Lucas Pereira
Brazil
“Great problem-solving skills and deep understanding of modern web technologies. A pleasure to work with.”
Emily Chen
Singapore
Latest Blog Posts
January 14, 2026 Articles
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January 14, 2026 Articles
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January 14, 2026 Articles
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