Open to opportunities

Bartłomiej Czyż

@bartek

Message

I build design systems and front-end platforms that help teams ship faster.

Poland

Message

What I'm looking for

I'm looking to build and improve design systems, front-end architecture, and developer experience, while mentoring engineers and helping product teams ship faster and more consistently.

At Equals Money, I designed and led the first cross-product design system from a personal PoC to multi-product adoption, powering the flagship web app, mobile app, and smaller products. I also modernised the front-end platform with Turborepo, React Query patterns, and visual-regression infrastructure built on lost-pixel.

I've spent 17 years building web products, with the last decade focused on React. At Adverity, I shipped and hardened components for a design system used across three products; at Software Brothers, I led a three-person team building front-ends for City Pantry and built a Node.js/NestJS API for Bussr.

I mentor engineers, run code reviews and architecture sessions, and have led a 10-engineer team and a six-month internal training programme. I also build solo projects end-to-end, including a live revenue-generating wedding-games platform and an open-source macOS app for managing Claude and Codex profiles.

Experience

Work history, roles, and key accomplishments

Current

Senior Frontend Developer

Current

Equals Money

Aug 2022 - Present (4 years)

Designed and led the company-wide design system from PoC to multi-product adoption, introduced Turborepo, initiated the move to React Query, and built visual-regression testing infrastructure. Mentored engineers and rolled out AI-assisted development tools.

Next.js TypeScript React Query Vanilla Extract styled components Jest Cypress TurboRepo Claude Code Codex

Senior Frontend Developer

Adverity

Mar 2020 - Jul 2022 (2 years 4 months)

Shipped components into the company-wide design system used across 3 products, built new components, hardened existing ones, and fixed bugs as the system scaled. Contributed to product development alongside design-system work.

React TypeScript Next.js React Query XState

Senior Full Stack Developer

Software Brothers

Jan 2019 - Mar 2020 (1 year 2 months)

Led a 3-person team building front-ends for City Pantry (Just Eat for Business). Designed and built the API for Bussr in Node.js / NestJS.

Angular 7 Node NestJS Docker Kubernetes MongoDB

In-house Software Development Trainer / Team Leader

Hemmersbach

Nov 2017 - Dec 2018 (1 year 1 month)

Designed and ran a 6-month internal training programme for junior web developers (JavaScript, PHP, React/Redux, Symfony 4). Led a 10-engineer team, owned code quality and UX, and built internal applications end-to-end including the Docker/Jenkins environment.

TypeScript React Redux Material UI PHP Symfony Docker Jenkins