Kraków Front-End Engineer (Freelance) — Internal Tools

FlixBus; Kraków; On-site; PLN 138,000 - 248,000; Part time

Job summary

FlixBus in Kraków is seeking a Front-end Engineer for a freelance/service agreement to join the IT & Engineering team building internal tools that streamline operations.

You will work with React and TypeScript on a modern stack (Vite, Tailwind, Storybook) in an Agile environment, delivering high-quality UI, driving frontend architecture, and collaborating with a distributed team. This role offers room to shape new products and requires strong English communication.

Qualifications

• Profound understanding of TypeScript and its ecosystem (package managers, bundlers, linters, etc.)
• Extensive knowledge of HTML and CSS
• Hands-on experience with React.js
• Experience writing tests and working with test runners such as Jest or Vitest, including UI/e2e testing
• Solid written and spoken English skills
• Experience working in an Agile setup

Responsibilities

• Independent development and delivery of high-quality frontend features within a self-organized, cross-functional distributed team
• Building intuitive, responsive user interfaces with a focus on internal user experience
• Driving frontend architecture decisions and contributing to technical quality across teams through code reviews and collaboration
• Working with a modern tech stack: React, TypeScript, Vite with Module Federation, TanStack Router & Query, Zustand, Tailwind CSS, React Hook Form with Zod, Vitest, Storybook, React Testing Library, and Biome

Skills

TypeScript

HTML/CSS

React.js

Testing (Jest/Vitest)

English

Agile

Tools

Vite

Module Federation

TanStack Router

TanStack Query

Zustand

Tailwind CSS

React Hook Form with Zod

Vitest

Storybook

React Testing Library

Biome

Job description

FlixBus in Kraków is seeking a Front-end Engineer for a freelance/service agreement to join the IT & Engineering team building internal tools that streamline operations.

You will work with React and TypeScript on a modern stack (Vite, Tailwind, Storybook) in an Agile environment, delivering high-quality UI, driving frontend architecture, and collaborating with a distributed team. This role offers room to shape new products and requires strong English communication.