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Java Developer – AI project
  • Lublin
Java Developer – AI project
Lublin, Lublin, Lublin Voivodeship, Polska
Sii Sp. z o.o.
15. 1. 2026
Informacje o stanowisku

Java Developer – AI project

Miejsce pracy: Lublin

Technologies we use

Expected

  • Java
  • Apache Kafka
  • Redis
  • AWS

Optional

  • AI

About the project

At Sii, we are looking for a Java Developer to join an innovative AI-driven fraud-prevention initiative delivered together with our global telecom client - a company best known worldwide for its cloud communications APIs enabling voice, messaging, and video at massive scale. You will help build intelligent, high-performance systems that protect millions of end users in real time, working in a diverse, supportive, and technology-focused environment. If you enjoy solving complex engineering challenges and want your work to have real-world impact, this is your place. Apply now and build the future with Sii.

Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

Your responsibilities

  • Design and implement new backend services that extend an AI-powered fraud detection platform
  • Translate product requirements into scalable technical solutions in close cooperation with product and analytics teams
  • Develop high-performance, cloud-ready Java services handling large volumes of real-time events
  • Take ownership of features from architecture design through deployment and production monitoring
  • Continuously improve system reliability, performance, and detection accuracy using data-driven feedback

Our requirements

  • At least 5 years of commercial experience as a Java Developer in complex backend systems
  • Hands-on experience with Kafka, Redis, and AWS in production-grade environments
  • Solid understanding of distributed, high-throughput, and event-driven architectures
  • Experience with multi-threaded applications, RESTful services, and scalable backend design
  • Good command of English (B2/C1), enabling effective collaboration in an international team
  • Residing in Poland required

Optional

  • Experience working with or integrating AI / Machine Learning systems

What we offer

  • Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
  • Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
  • We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
  • Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
  • Comfortable workplace – class A offices or remote work
  • Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
  • PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
  • Investment in your growth – meetups, webinars, training platform and technology blog – you choose
  • Fantastic atmosphere created by all Sii Power People

Recruitment stages

  • Send your CV
  • Talk to us about your expectations
  • Learn more about our projects and choose the best
  • Start your adventure with Sii!

Sii Sp. z o.o.

Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.

Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

  • Praca Lublin
  • Project Manager Lublin
  • Lublin - Oferty pracy w okolicznych lokalizacjach


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