Hi, I'm Marcin!

Frontend Architect & Tech Lead

With 11+ years building for the web — 7+ in modern frontend (React, Next.js, TypeScript) — I've led teams of 30+ engineers and today focus on hands-on Tech Lead work with focused teams (8-12 people). I combine system architecture, production code, and technical leadership.

I specialize in React, Next.js, and TypeScript — building scalable frontend systems with focus on performance, maintainability, and team velocity. I work with Node.js and AWS for full-stack delivery, leveraging AI-assisted workflows to optimize development processes.

I didn't start here though. Customer support, WordPress, jQuery, Angular, Vue — and eventually React, Next.js, AWS, and AI tooling. I don't settle on a stack. I follow where the craft leads. That's the nomad part.

My Expertise

I combine technical know-how with leadership skills, creating solutions that not only work effectively but also inspire and empower teams.

Frontend Development

I build scalable, maintainable frontend systems using React, Next.js, and TypeScript. My focus is on performance, code quality, and long-term architecture — not just shipping features.

ReactNext.jsTypeScriptPerformance OptimizationModern CSS

Tech Leadership

I lead frontend teams as a hands-on Tech Lead — writing production code, reviewing architecture, and mentoring engineers. I've led delivery for teams of 30+ and built hiring processes from scratch.

Team MentoringProject StrategyCode ReviewsTechnical Decisions

System Architecture

I design frontend architectures that scale — modular, clean, CI/CD-ready. I help teams make the right technology choices early, so they don't pay for them later.

System DesignScalabilityClean ArchitectureFuture-proofing

AI-Assisted Development

I integrate AI tools like Claude and ChatGPT into real development workflows — not as hype, but as a practical multiplier for team velocity and code quality.

Performance TuningProcess ImprovementInnovationBest Practices

Ready to collaborate?

What Others Say

Testimonials from people I've worked with

I had the pleasure of working closely with Marcin and I can honestly say he's one of the best tech leads I've collaborated with. What impressed me the most was his ability to keep everything moving forward, even in complex corporate environments. Marcin has a rare mix of technical depth and leadership skills: he unders...

Edoardo

👨‍💻 Senior Frontend Engineer | 🚀 Remote-First | ⚡ React, TypeScript, Next.js | 💡 DevX & Performance Enthusiast

Marcin is a rare combination of a highly knowledgeable frontend expert and an exceptional leader. I've had the honor of collaborating with him during his tenure as my team leader in the frontend division. His technical prowess in frontend development is second to none, and he consistently keeps our team updated on the ...

Hubert

Senior Fullstack Developer

I had the pleasure of working with Marcin, who was the tech leader in a project I was taking part in. Marcin made a great impression on me by combining broad frontend knowledge and professional attitude with an open-minded approach towards his project colleagues, recognizing their unique strengths and guiding them to m...

Adam

Marcin understands how to get work done in a corporate structure and improve engineer efficiency. He brings a lot of great experience not just in terms of engineering but also how to manage critical human conflict working with diverse teams set working across different timezone. At time I was completely astonished by h...

Adeel

Senior Fullstack Developer | Helping startups and enterprises build scalable, custom web apps using MERN stack. | Building FitComrade | ex-Uber, Mega Pharmaceutical Corp., Glassnode , Relayr

I have worked closely with Marcin and have been consistently impressed by his commitment to helping me develop my career and unwavering dedication to innovation. He has created an environment that fosters continuous learning, encouraging me to acquire new skills and knowledge. As a mentor and guide, Marcin has playe...

Adrian

Front end developer

I have been working with Marcin for almost four years, I had the opportunity to observe his development over the years. Above all, he is a great developer for whom nothing is impossible and he treats every difficult task as an opportunity to develop. He works great even with people who have no technical knowledge - he ...

Agata

IT service coordinator

We have been working with Marcin since the beginning of my employment at Billennium and for 3 years we have been creating e-learning Project - the Advanced Learning Factory. During the collaboration Marcin showed great knowledge and was very helpful with any case I came with. That was a real pleasure to work with Marci...

Malgorzata

Designer

I had the opportunity and pleasure to work with Marcin in the same team. In addition to their deep expertise and passion for the front end, what I enjoyed most about working with Marcin was his collaborative leadership style and effective communication, which produced outstanding results.

Alexandros

Behavioral Scientist • Business Strategist • Ethical Innovation Leader • Individual & Collective Growth Coach • Investor

Marcin is a person of his word, nothing is impossible for him - only a matter of time. He reported to me for over two years, during this time we have been through quite a lot of transformations and challenging times. Even in the most difficult periods, I could rely on Marcin in all cases. He is very sturdy, if you gi...

Botond

Managed Services, EAM Consultant at Veeva | ITIL Certified | Certified

I had the opportunity to work with Marcin on preparing his public presentation for colleagues in an IT company. The audience was quite large and consisted of people he collaborates with on a daily basis, which made it both supportive and challenging — presenting in front of such a group requires confidence and strong p...

Marzena

Public Speaking Coach | Business Presentation & Communication Trainer | Keynote Speaker | Event Host

Certifications & Learning

Continuous investment in cloud architecture, AI workflows, accessibility standards, and scalable frontend systems — supporting both technical leadership and hands-on delivery.

AWS Certified Cloud Practitioner

Amazon Web Services

2026

AWS AI Practitioner

Amazon Web Services

In progress

WCAG Web Accessibility

Widzialni.eu

12.2024

React Certification

Eduweb

03.2024

Frontend Design Patterns

dev.js

09.2020