senior java backend developer

Sii Poland is seeking an experienced Senior Java Developer to join a team building a modern enterprise data integration platform. You will design and deliver scalable backend services, microservices, and event-driven integrations supporting global logistics processes.The role emphasizes modernizing legacy applications, applying Domain-Driven Design, and...

We are looking for a Senior Java Developer to join a long-term banking programme focused on developing and modernising enterprise backend systems. The role involves designing and building scalable backend services using Java 17+, Spring, and Kafka, working with distributed systems, relational and non-relational databases, and contributing to the...

OverviewWe are seeking a highly skilled individual to join our team in a pivotal role that focuses on developing robust and scalable applications. This position offers an exciting opportunity to work with cutting-edge technologies and contribute to the success of our projects.Key ResponsibilitiesDesign, develop, and maintain high-quality Java...

We are looking for Senior Java Developers to join a long-term payments technology programme supporting a large-scale terminal management platform. The role focuses on backend development, enterprise integrations, system modernisation, and the gradual transformation of a business-critical platform managing hundreds of thousands of payment terminals.This is a...

For our client we are currently looking for a Java Developer who, together with the team, will be responsible for the technical aspects of the project related to genetic diagnostics. In this position you’ll collaborate with a team from Poland and German and be a part of global company in the field of biotechnology and molecular diagnostics.

Opis firmyNasz klient to startup z korzeniami w Dubaju posiadający ponad 30 własnych kuchni w kilku krajach świata - z apetytem na znacznie więcej.Cała firma to prawie 1000 osób (głównie personelu kuchennego) ale oprogramowanie powstaje za sprawą 40 osobowego, krakowskiego zespołu. Dzięki niemu restauratorzy z dowolnego miejsca na świecie mogą...

For our client, a global leader in its industry, we are looking for a Senior Java Developer. Working mode: Remote Type of contract: B2B  Key Responsibilities: Design, develop, and maintain Java applications supporting our savings and investments products. Build robust calculation engines that ensure compliance with current tax regulations across multiple...

  O firmie  Autopay tworzy technologie, które upraszczają codzienne płatności i procesy finansowe dla milionów użytkowników. Działamy na styku fintechu, produktów cyfrowych i nowoczesnych technologii, budując rozwiązania wykorzystywane każdego dnia. W obszarze Product & Data Engineering (P&DE) rozwijamy i utrzymujemy produkty oferowane...

Develocraft poszukuje osoby na stanowisko Senior Java Developer.Projekt obejmuje rozwój zaawansowanych systemów pricingowych dla branży retail i e-commerce w środowisku omnichannel. Rozwiązania wspierają zarządzanie cenami na każdym etapie cyklu życia produktu - od ustalania cen regularnych po strategie promocji i markdownów. System integruje dane...

Jesteśmy częścią międzynarodowej organizacji notowanej na NASDAQ w Sztokholmie, działającej w 11 krajach. W Polsce mamy pełną autonomię. Sami wybieramy technologie, procesy i sposób pracy, zachowując najwyższe standardy.Realizujemy różnorodne projekty IT w Polsce i globalnie, w wielu obszarach i technologiach, co pozwala rozwijać...

Company DescriptionAmelco are a Fast-Growing Technology Company providing trading solutions to three of the UK’s top online gaming companies while delivering market leading sportsbook development including automated, algorithmic sports betting trading solutions. We believe quality, ability and determination are vital ingredients in delivering success at...

The consultant will work as a Senior IT Developer in IMSecurities, developing and modernising backend integration components around the Safekeeping and Corporate Actions platform. The work includes designing, developing, testing, deploying and supporting Java-based microservices and integration components connecting IMSecurities with other client...

Project InfoThe project centers around a high-performance Kotlin application consisting of 7 functional services. It serves as a vital translation layer for JSON/XML web service communications within the global airline content distribution ecosystem. Deployed in a Google Cloud Platform (GCP) environment, the system powers integration and communication for...

Job Description• First and foremost contribute to the development of our products and guide the future evolution of our systems• Apply best development practices• Master and utilize state-of-the-art technologies within our products• Design for today's requirements but at the same time keep in mind future evolution of the systems•Be part...

Dla naszego klienta poszukujemy kandydatów na stanowisko: Senior Java Developer (ASAP)       Start współpracy: Maj 2026 (ASAP).  Projekt: Budowa i transformacja nowoczesnej, uniwersalnej platformy danych dla globalnego serwisu streamingowego. Przebudowa architektury backendowej pod kątem cross-zespołowej analityki, wysokiej wydajności oraz...

  Description Tango is a successful, market leader, a live-streaming Platform with 450+ Million registered users, in an industry projected to reach $240 BILLION in the next couple of years.  The B2C platform, based on the best-quality global video technology, allows millions of talented people around the world to create their own live content, engage...

Company DescriptionAre you ready to take ownership of mission-critical backend systems in a high-load environment? We are looking for a Senior Java Developer to join our engineering team in Warsaw.This is a hybrid role with 3 days per week in the office, giving you the perfect balance between collaboration and flexibility. At Sigma Software, we value...

For our client an IT company specializing in new product development and R&D, focused on solving complex challenges in the tech industry we are looking for a Senior Java Developer based in Poland or Lithuania.Responsibilities Feature development — design, implement, and integrate new functionality using Java 17–21 and the Spring ecosystem; participate...

*Please note: we are only able to consider candidates who already have the right to work in Poland. Visa sponsorship is not available for this role.* Every day, billions of transactions move through the global banking system. Fraud hides in that data. So do compliance risks, operational failures, and patterns most systems never surface. At Vyntra, we build...

Who we are:Charles River Development (CRD) is the FinTech division of State Street. Together with State Street’s Middle and Back-office services, Charles River’s cloud-based Front Office technology forms the foundation of the State Street Alpha Platform, the first front-to-back solution in the industry.Our vision is to be the world’s leading...