Frontend Engineer – Greenfield Internal Tools (React/TS)

Flix; Warszawa; Remote; PLN 83,000 - 131,000; Full time

Job summary

FlixTrain is seeking a skilled Fullstack Engineer (Frontend focused) for a service agreement collaboration (B2B) to help build internal tools for timetable planning and vehicle allocation, reducing manual work. You’ll shape new products in a greenfield environment with React and TypeScript, while contributing to frontend architecture and collaborating with a distributed team in an Agile setup.

The role is open to contractors based in Poland, offering a flexible remote/contract arrangement and

Qualifications

• Experience with React and TypeScript in production.
• Strong HTML/CSS skills and responsive design.
• Backend experience with Node.js or similar and GraphQL APIs.
• Experience writing tests with Vitest or similar.
• Knowledge of event-driven architectures and microservices.
• Excellent written and spoken English; Agile team experience.

Responsibilities

• Develop frontend features using React/TypeScript for internal tools.
• Collaborate on backend tasks including GraphQL APIs and server-side logic.
• Contribute to frontend architecture decisions and code reviews.
• Write automated tests to ensure reliability and maintainability.
• Work with internal stakeholders to translate needs into practical solutions.

Skills

React

TypeScript

HTML

CSS

Node.js

GraphQL APIs

Vitest

Event-driven systems

English

Agile

Domain knowledge (transport/logistics)

Tools

GraphQL

Spring Boot / Spring Framework

Kafka

AI-assisted coding

Job description

FlixTrain is seeking a skilled Fullstack Engineer (Frontend focused) for a service agreement collaboration (B2B) to help build internal tools for timetable planning and vehicle allocation, reducing manual work. You’ll shape new products in a greenfield environment with React and TypeScript, while contributing to frontend architecture and collaborating with a distributed team in an Agile setup.

The role is open to contractors based in Poland, offering a flexible remote/contract arrangement and