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December 17, 2025

Java Software Engineer

Senior • Remote

More about us

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!


About the Client

We are looking for an experienced Java Developer who will join a long-term project for our client from the communication technology industry.


What will you do:

  • Design and build systems which add features to our fraud prevention platform

  • Work with the Product team to define requirements, then iterate based on customer feedback

  • Write efficient and scalable code, in well-tested systems, running on public cloud infrastructure

  • End-to-end ownership of what you ship, from architecture discussions through implementation to monitoring in production


What we are looking for:

  • 5+ years of experience in Java

  • An excellent practical understanding of high performance distributed computing

  • A strong focus on testing, with a customer-first mindset

  • Experience of multi-threaded, 3-tier architectures, web services and caching

  • Experience dealing with event-driven pipelines

  • Experience in LLM (Large Language Model)

  • Experience with AWS

  • Good communication skills in English


Nice to have:

  • Experience integrating with Machine Learning systems to deliver product features

  • Experience with Redis and Kafka


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!