devShark
Developer-knowledge quiz and learning app with topic paths, daily challenges, real-time multiplayer, and leaderboards, built on React, serverless functions, and Supabase.

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Senior Frontend Engineer
I specialize in TypeScript and React — from micro-frontends for online banking to AI tooling in production teams. I care about readable code and frontends that stay maintainable as they grow.
Developer-knowledge quiz and learning app with topic paths, daily challenges, real-time multiplayer, and leaderboards, built on React, serverless functions, and Supabase.
Personal life dashboard for subscriptions, todos, streaks, finances, Czech invoices, books, and a calendar, with natural-language quick-add powered by Claude.
Daily, fully static bilingual (CS/EN) AI & tech magazine — a scheduled GitHub Actions job scrapes the day's sources and Claude curates and writes each issue.
Real-time, browser-based Czech-themed Monopoly where 2–4 players buy Czech cities via a room code, with a trivia twist and full CS/EN localization.
Enter a birth year, country, and city to get an instant, fully in-browser report on the era someone grew up in — no backend and no API calls.
Marketing site for a Czech bus and freight company, covering its fleet, passenger, and cargo services, with a focus on SEO and i18n.
Marketing site for a Czech exterior-cleaning service — hot-water pressure washing of facades, roofs, and paving, with before/after sliders, a service breakdown, and a quote request form.
Marketing site for a Czech spa-wafer maker, covering its history, products, and distribution.

B2B meditation-booking app with a booking dashboard, achievements, and news, built on a Turborepo monorepo.
Unfortunately I don't have a photo of the app anymore, but look at that beautiful team that built it!

Company rebrand and web app, focused on performance, backed by PostgreSQL and Prisma.
Personal developer portfolio with a terminal-inspired design and animated, responsive sections covering my stack, experience, and projects.
Apr 2026 – Present · Prague, Czech Republic
Senior Frontend Engineer
Oct 2025 – Mar 2026 · Prague, Czech Republic
Senior Fullstack Developer
May 2025 – Sep 2025 · Barcelona, Spain
Fullstack Developer
Nov 2024 – Jun 2025 · Barcelona, Spain
Frontend Developer
Jan 2025 – Feb 2025 · Brno, Czech Republic
Frontend Engineer
Apr 2024 – Oct 2024 · Barcelona, Spain
Full Stack Developer
Nov 2021 – Apr 2024 · Reykjavík, Iceland
Technical Analyst
Jan 2020 – Sep 2021 · Gibraltar
User Protection Expert
Dec 2015 – Nov 2019 · Brno, Czech Republic
Customer Relations Advisor
Computer Software Engineering
Intensive software engineering academy in Barcelona focused on full-stack web development. I worked mainly with JavaScript, TypeScript, React, Next.js, Vue.js, Node.js, Express.js, PostgreSQL, Prisma, and MongoDB, alongside data structures, algorithms, and tools like Git, Docker, Vercel, and Figma. Most of the learning came from building actual projects, which is also where I got hooked on software engineering.
Web Development
Web development bootcamp where I built my foundation in HTML, CSS, and JavaScript. The course centered on responsive, interactive web apps and the fundamentals behind them.
// completed courses & favorite mentors
Josh W. Comeau's interactive React course covering fundamentals, hooks, state, component design, and full-stack Next.js.
Developer and bootcamp instructor behind Udemy's best-selling Web Developer Bootcamp; former lead instructor at Galvanize.
Web developer, designer, and teacher of the Complete JavaScript and Ultimate React courses, with over 2M students.
Full-time TypeScript educator and creator of Total TypeScript; former XState core team and Vercel developer advocate.
Founder of CleverProgrammer, teaching project-based full-stack development to over a million aspiring developers.
Full-stack developer and educator who helped build CleverProgrammer; now co-founder of the AI tool Poppy AI.
Project-based coding community that helps people build full-stack apps and land developer jobs.