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Billennium

Frontend/Fullstack Developer

Billennium
Poland · Part-time · Associate

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!


We are hiring on behalf of our Client — a company dedicated to improving the quality of life for people living with chronic kidney disease. Join a team that builds innovative web applications for patients and healthcare professionals across the globe.


This is a part-time position (0.5 FTE)


What you will do:

  • Build responsive, accessible user interfaces using React, Tailwind, and TypeScript
  • Implement secure authentication and account management via Azure AD B2C
  • Integrate APIs and manage data flow with Axios, React Query, and Zustand
  • Develop multilingual and geo-targeted features for international audiences
  • Collaborate on backend integration using ASP.NET Core and EPiServer CMS
  • Optimize performance, accessibility (WCAG), and SEO across platforms


What we're looking for:

  • Experience with React, TypeScript, and modern frontend technologies
  • Familiarity with backend development using ASP.NET Core and SQL Server
  • Mandatory experience with EPiServer CMS and its integration in web platforms
  • Understanding of authentication flows and user management (Azure B2C is a plus)
  • Experience with internationalization and localization in web applications


Perks and benefits:

  • Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.
  • Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location.
  • Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.
  • Global collaboration - work with a diverse, international team.
  • Innovative environment - be part of a forward-thinking and growth-oriented workplace.
  • Engaging community – Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.
  • Team-building events including our company tradition (annual company event in Mazury).
  • A pleasant surprise to start your journey with us in the form of a welcome pack.


Recruitment process:

  • HR call
  • Technical Interview
  • Interview with the dedicated Client
  • Final decision/ Feedback


Sounds interesting? Click "Apply" and have a chance to hear more!

Key Skills

Ranked by relevance

react responsive salesforce sql aws seo
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Posted
Aug 20, 2025
Type
Part-time
Level
Associate
Location
Poland
Company
Billennium

Industries

IT Services IT Consulting

Categories

Information Technology

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