Makers' Den

Founded in late 2017 and incorporated as Makers’ Den GmbH in Berlin, Germany, Makers’ Den is a boutique ReactJS development agency built by developers, for developers. The agency was founded by full-stack engineers Korneliusz Caputa and Carl-Petter Bertell – two developers with more than a decade of combined agency experience who decided to create the kind of agency they had always wanted to work with: small, lean, senior-only, and directly communicative with no account manager overhead. A third partner, Mateusz Koncikowski, joined as a full partner in a subsequent growth phase.

Makers’ Den deliberately keeps its team small and tight-knit, with clients getting direct access to production engineers rather than intermediaries. This model has produced long-term partnerships and consistently high client satisfaction – reflected in a 4.9 Clutch rating across 25 reviews and recognition as a Top ReactJS Developer Germany 2025, Top React Native company (The Manifest), Top ReactJS Winner (TechBehemoths), and Sortlist Verified Agency. The team uses AI agents where they accelerate delivery and senior engineers where judgment matters – an AI-augmented delivery model that enables faster iteration without increasing the risk of costly mistakes.

Named clients include Klarna, OLX, FRI:DAY Versicherungen (backed by Baloise), Pexip, iHealth, Healthzilla, Regulation Asia, Skedify, Yade, Fyrfeed, and ProEdu Oy. Services span full-stack ReactJS web development, React Native mobile apps, headless CMS websites, composable headless e-commerce with Shopify, custom AI agent development, and NodeJS backend development.