Bart Stefanski

Hello, I'm
Bart Stefanski

Software developer focused on crafting robust web experiences. Skilled in advising on web platform, performance, developer experience, and expert in Next.js & React.js.

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Showcasing tech achievements, from impactful software development and diverse collaborations to GitHub recognition and expertise in talent assessment.

50 million
Users actively engaging with software I developed
Extensive projects with various individuals and organizations
GitHub stars earned in numerous solo and team projects
Interviews Conducted with potential developer candidates

Github Contributions (2024)

My GitHub Contributions show my ongoing open-source involvement since 2017, a fulfilling hobby I engage in during my free time.


Some of the non-commercial and open source projects I've created
View all projects
5698 GitHub stars


An enterprise-grade Next.js boilerplate for high-performance, maintainable apps. Gained over 4.5k stars
229 GitHub stars


Roadmap showcasing the journey to becoming a proficient Next.js Product Engineer in 2023
173 GitHub stars


Transform your Styled-Components into TailwindCSS with this handy codemod. Founded the idea of the project and led the project development.

A curated list of JavaScript, Next.js, React, Cloud and Architecture questions. With upvote-based ranking system.
48 GitHub stars


An interactive shell for NestJS which allows you to plug-in your custom commands and use them when the app's running
1253 GitHub stars


Free Next.js responsive landing page template for SaaS products made using JAMStack architecture
Minecraft Server Archive

Minecraft Server Archive

This archive encapsulates my former Minecraft server, showcasing a live minimap and various screenshots, saved to honor its legacy
72 GitHub stars


Image proxy for Next.js. Makes it possible to use dynamic domains in next/image component


Open source online social platform with set of tools for personal trainers and gym goers. Written in Java, Spring and Vue.js


Minecraft plugin full of utility commands for users and admins. Made with monorepo architecture in Java

Latest articles

For a few years now, I've been sharing insights on my blog from my tech journey, focusing on simply and effectively solving tech issues. It's how I love to learn.


Over the years, I've received numerous testimonials from colleagues and peers in the tech industry, reflecting on my collaborative work and problem-solving skills

Before I worked with Bart, I thought that the term "10x developer" was made up, but it describes him perfectly. I believe that Bart's remarkable problem-solving abilities stand out the most. He usually has a solution before I can fully articulate the problem. Additionally, he possesses extensive knowledge in web development and stays up-to-date with the latest technologies. Bart is truly an exceptional developer and a great person to work with.

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Jakub JabΕ‚oΕ„ski
Head of Integration @ Blazity

I had the pleasure of working with Bart on several occasions. Every time, he showed a lot of professionalism, high proactivity when it came to looking for problem solutions, and a willingness to help less experienced developers. Bart is a great team player who takes ownership of the product he is working on. He's an excellent mentor and a valuable asset that would enhance any development team, regardless of project complexity.

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Filip Dukat
Software Engineer @ Blazity

I genuinely admire Bartek's analytical and engineering skills. Bartek is one of the most talented engineers I have been working with so far; Besides his outstanding engineering skills, he is an excellent communicator and a solid team player. I highly recommend Bartek to work with, especially on challenging projects and problems where there is a need for an A player in a team.

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Pawel Dadun
CEO @ Blazity

I had a pleasure to work with Bart on several projects and I must say wow... Bart's knowledge about Next.js and web performance is astonishing, without a doubt. For the past few years I've learned a lot about previously mentioned technologies, general programming and OOP. His approach to programming and software engineering that goes in pair with marvellous skills regarding communication and planning makes him a perfect pal to collaborate with.

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Igor Klepacki
Full-stack Developer @ Enfour Digital

I've worked alongside Bart for a bit and I can assure you that it's always been a smooth experience. Bart was always ready to help with everything thanks to all of the solutions and ideas he just constantly keeps coming up with, which came in handy not just once. Also if you ever will encounter Bart of a technical interview don't worry, it was the most comfortable and best interview I ever had, even when I was being checked for every possible outcome and piece of knowledge that might be useful, the stress just disappeared. Recommending Bart comes without hesitation.

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Kacper PotyraΕ‚a
Software Engineer @ Blazity

I hold Bart in high regard as a developer and colleague overall. He was coaching me for some period of time and during that phase I learned many useful aspects of programming. His knowledge of performance-related topics and ability to present this knowledge to other person is making him a great person to hang around if you want to gain deep knowledge about Next.js or programming in general.

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Igor Lasota
Software Engineer