About Us

THE BACK STORY

It starts in Berlin late 2017, with two ReactJS freelancers, who later team up with a third one.

Carl-Petter

Korneliusz

Mateusz

Late 2017 Berlin developer freelancers Korneliusz Caputa and Carl-Petter Bertell decided to do what they never wanted to do again - work for an agency.

A few months later Makers' Den GmbH was open for business and enjoyed a steady stream of ReactJS work. After a few initial years of ups and downs, we were later joined by Mateusz Koncikowski, and we went into a new growth phase.

We prefer to work in small tight-knit teams with people we know and trust, or together with client teams. It makes communication easy and keeps overhead low.

We're doing what we love and we're ok with our reputation being based on the quality of our work.

- Korneliusz, Carl & Mateusz

Who we are

We love what we do
and only employ
people with a
similar mindset

You ship faster by working with a small team where each member is a true senior. With us you get direct access to everyone. This keeps overhead low and output high.

Meet the team

Satisfied customers

107

Completed projects

Team members

Years in business

Our Team

Meet Your Makers

Meet the people behind the work. You'll work directly with the engineers building your product.

Carl-Petter Bertell

[Full-stack architect]

Carl-Petter is a founding partner and hands-on full-stack architect with 20+ years of experience. He has been building for the web since the mid-1990s and brings a strong sense of design to his engineering work.

Korneliusz Caputa

[Full-stack engineer]

Korneliusz is a founding partner and full-stack engineer with more than 15 years of experience. He has built products and services for brands around the world.

Mateusz Koncikowski

[React & TypeScript engineer]

Mateusz is a partner and React and TypeScript engineer with more than 15 years of experience. He has also spoken at conferences and created developer courses.

Natalia Walasik

[React & TypeScript engineer]

Natalia is a React and TypeScript engineer with more than ten years of experience, including fintech work for global clients. She also helps women enter tech through volunteer projects.

Igor Szukało

[Full-stack web & mobile]

Igor started in yacht design before moving into full-stack development. He pays close attention to detail in the products he builds.

Michał Płócienniczak

[Full-stack React engineer]

Michał started coding young and now builds full-stack React products. He focuses on software that solves practical problems for clients.

Kamil Zaborowski

[Full-stack software engineer]

Kamil is a full-stack engineer and former startup founder. He brings firsthand experience of building a business to his product work, and follows football closely.

Norbert Matynia

[React & TypeScript engineer]

Norbert is a Leicester-based React engineer who builds digital products with TypeScript and Tailwind.

Mateusz Ziomek

[Web, mobile & backend engineer]

Mateusz is a self-taught web engineer who works with React and TypeScript. He's also interested in backend architecture, including domain-driven design, CQRS and event-driven systems.

Karol Pudło

[React & React Native engineer]

Karol builds web and mobile products with React and React Native. He keeps a close eye on how both technologies evolve.

Piotr Bogus

[iOS engineer]

Piotr is an iOS engineer with more than 10 years of experience building mobile apps and solving technical problems. Outside work, he enjoys off-road motorcycle touring and DIY projects.

Patryk

[iOS developer]

Builds native iOS apps with Swift.

Krzysztof Gajewski

[Android engineer]

Krzysztof is an Android engineer who joined Makers' Den in 2026. Outside work, he follows financial markets, makes coffee at home and enjoys sport and football.

Tomek Dziergwa

[Android engineer]

Tomek builds Android apps.

Dominik Kaliszewski

[Java & Kotlin engineer]

Dominik is a senior engineer with eight years of experience, specializing in Java and Kotlin. He previously worked at Atlassian and is interested in AI.

Sebastian Frysztak

[Full-stack engineer]

Sebastian is a full-stack engineer with more than eight years of experience across React, TypeScript and Node.js. He writes open-source software and builds self-hosted tools for fun. His corgi keeps him busy outside work.

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