Hi, I'm Jiří.I build web appspeople rely on.

Frontend engineer in Zlín, five years in. I work in React, Next.js and TypeScript, and I like the part most people skip: making it fast, accessible and still easy to change a year later.

Right now I build cbONLING at cbData, the platform operators use to run online casinos. Before that, mapping editors at MapTiler and developer platforms at NXP.

Tell me what you are building.

Start a projectSee the work first

Five years of production work

  1. cbData

    Frontend Engineer

    Frontend of cbONLING, the platform for running online casinos, where every market adds its own regulatory module.

    React, Next.js, TypeScript

    Aug 2026 - Present

  2. MapTiler

    Frontend Engineer

    Mapping products and editors. Led the frontend of the new web Georeferencer.

    React, TypeScript, Next.js

    Apr 2025 - Aug 2026

  3. NXP Semiconductors

    Software Engineer

    Application Code Hub and SDK Builder, the platforms NXP ships to its own developers.

    React, Next.js, TypeScript, Apollo GraphQL

    Jan 2023 - Mar 2025

  4. NXP Semiconductors

    Software Specialist

    Legacy web applications rebuilt responsive.

    React, Figma

    Aug 2021 - Dec 2022

Things I have shipped

  1. CephDetail

    Legacy site moved to Next.js. Reservation flow and the questionnaires customers fill in before booking.

    LiveNext.js, React, Tailwind CSS, GraphQL

    CephDetail

  2. CephDetail Vouchers

    Gift vouchers: pick an amount and a design, pay through GoPay, it lands in an inbox.

    LiveNext.js, React, Tailwind CSS, GoPay

    CephDetail Vouchers

  3. BeenThere

    Log where you have been, plan where you have not.

    In progressNext.js, TypeScript, React Query, Supabase

    BeenThere

Let us talk

jiri@zenzinger.cz

5+
Years shipping
4
Roles
3
Companies
2
Products live