Senior JavaScript Front-end Developer

Senior JavaScript Front-end Developer

About Us

We are a stable software company with more than 20 years of experience, developing large-scale online entertainment platforms for international markets using Python / PostgreSQL / React. Our work goes beyond simple websites - we build complex SPAs, internal tools, and shared libraries used across multiple brands and products. These are real production systems with a substantial user base, not presentation websites.

What You’ll Do
  • Develop and maintain large-scale React SPA applications across multiple brands.

  • Collaborate with backend developers (Python/PostgreSQL) and the game team using PixiJS.

  • Design and implement maintainable front-end features.

  • Debug production issues across desktop and mobile devices.

  • Work within a shared monorepo environment.

  • Build internal tools and automation utilities.

  • Participate in technical decisions and architecture discussions.

Requirements
  • At least 3 years of commercial experience developing web applications.

  • Strong knowledge of modern JavaScript/TypeScript and React.

  • Experience with larger SPA applications.

  • Advanced browser debugging and devtools usage.

  • Experience with responsive development and CSS preprocessors.

  • General software engineering knowledge beyond the JavaScript ecosystem.

  • Czech or Slovak for daily communication.

  • English sufficient for technical documentation and team communication.

Nice to Have
  • React Query, React Hook Form, React Router, Zustand/Redux, Yup or similar.

  • Experience with websockets or real-time communication.

  • Performance optimization experience.

  • Monorepo and shared-library development.

  • Experience with bundlers such as Rspack, Webpack, or Vite.

  • Experience with dApp/wallet integrations.

  • Active use of AI tooling during development.

What We’re Looking For

Someone who:

  • Doesn’t just want to close tickets.

  • Takes ownership of their solutions.

  • Works independently and efficiently.

  • Thinks about broader technical context.

  • Wants to grow long-term alongside the product.

Years of experience matter less to us than quality of thinking and approach.

What We Offer
  • Long-term collaboration on large-scale international products.

  • Flexible remote/on-site cooperation, offices in central Prague.

  • Influence over technical decisions and space for your own initiative.

  • Friendly environment in a mid-sized company.

  • 5 weeks of vacation and sick days.

  • Multisport card.

INTERESTED?

Send us your CV. Looking forward to hearing from you!

Can you assemble thelogo?