Frontend developer • React & TypeScript

Marek Dolníček

Enterprise-ready React developer based in Prague.

Over the past decade I have delivered internal portals for O2 Czech Republic, TESCO Stores CZ, MONETA Auto, České dráhy, JABLOTRON GROUP and other Czech brands. I own the front-end in React and TypeScript, tie it back to Java or PHP APIs, and keep Material UI and custom design systems lean and performant while constantly learning—from orchestrating AI agents to experimenting with DevOps practices.

Email marekdolnicek@gmail.com View experience timeline

Portrait of Marek Dolníček — Marek Dolníček — Czech frontend developer focused on enterprise portals.

Years in frontend

Enterprise portals delivered

2012

Freelance since

Enterprise React delivery

Systems used daily by Czech teams

I deliver maintainable React and TypeScript applications for banks, rail operators and retailers. Data flows from Java, PHP or GraphQL APIs into accessible Material UI and CSS systems that keep in-store teams productive while constant experiments with AI agents and CI/CD routines improve delivery each sprint.

React delivery
- React, Next.js & Gatsby
- Redux, Formik & React Hook Form
- Material UI & custom design systems
Backend & data layer
- Java & PHP APIs
- REST + GraphQL integrations
- PostgreSQL & MySQL administration
Tooling, AI & DevOps
- Webpack, Gulp, Vite build systems
- Prompting + managing AI copilots
- CI/CD habits, monitoring, performance budgets

AI sandbox

O2 Czech Republic care cockpit

React/Redux workspace with Zustand-backed helpers that lets support teams track fiber builds, automate reminders, and run MongoDB-backed reporting while Docker pipelines keep releases safe.

Impact

Keeps telecom teams on a single view of service health and client escalations.

Idea 1 / 4

Selected projects

React-heavy surfaces with Astro discipline

Frontend developer @ NEOVIA

O2 Czech Republic Service Workbench

NEOVIA React/TypeScript portal that helps O2 teams plan internal work, check service tickets, and coordinate operations in one Material UI workspace.

React TypeScript Redux Zustand Material UI MongoDB Docker Playwright

Frontend developer @ CONSWARE

TESCO Stores CZ Operations Portal

Internal application for store managers to plan campaigns, check stock, and sync reports across Czech hypermarkets.

React TypeScript Redux Material UIJava REST APIsPostgreSQL

Frontend developer @ BOOTIQ

MONETA Auto Underwriting Workspace

Next.js-based suite that supports loan advisors with validations, document tracking, and integrations to internal APIs.

Next.js React Hook Form TypeScriptStyled ComponentsREST APIs

Frontend developer @ SYNETECH

JABLOTRON Service Dashboard

React + Gatsby tooling that lets installers manage devices, schedules, and service tickets in one interface.

Gatsby React GraphQL TypeScript Material UI

View all projects →

Timeline

Career milestones & key clients

Let's pair on your React surface

Async briefs, live pairing, or embedded consulting. I plug in quickly, leave documentation behind, and keep performance budgets measurable.