Senior Front-End Developer

Fully remote, Poland

Want to become a part of something new?

We are seeking software enthusiasts who are open to new challenges and new technologies.

Interested in working in an international team on stable, long-term projects? – Join us!

Together with colleagues from Poland and the Netherlands, you’ll be working in an experienced team, developing business applications for the European market.

Your key skills

  • At least 4 years of development experience with JS
  • Strong understanding and experience in HTML, CSS, XML
  • Strong experience with Angular 9+
  • Strong knowledge of JavaScript/TypeScript
  • Strong knowledge of RxJS
  • Hands-on experience with RWD
  • Hands-on experience with REST API
  • General UI/UX knowledge

Extra points for

  • General backend experience
  • Knowledge of Git
  • experience with Continuous Integration approach
  • Experience with work in an Agile environment 

We offer

  • B2B: + 26 paid days off and paid sick leaves
  • Fully remote work (possibility to work in Wrocław office or hybrid)
  • Longterm and stabile projects
  • Work in SIENN teams (not outsourced)
  • International training and certifications (Microsoft MCP)
  • Diversity of projects (international and domestic Clients)
  • Constant personal growth (defined career paths, additional leave for training, training budget) 
  • Medical package and Multisport card
  • Great atmosphere at the workplace and fun after hours!

Digitalize the world with us!


If you have questions about this position, contact me 🤙

Katarzyna Skowronek

HR Specialist

+48 889 783 562

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    Claartje Pothof-van der Zande

    HR Specialist

    +31 24 366 0 466

    Katarzyna Skowronek

    HR Specialist

    +48 889 783 562

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