Senior Java Developer Jobs in Warsaw

Design and evolve the platform access architecture for a large-scale distributed ecosystemBuild and maintain a unified API layer over multiple distributed servicesImplement fine-grained ABAC authorization at scale supporting complex hierarchies and relationshipsDevelop fail-closed security architect...

Design and implement core components of the audience segmentation platformDevelop and evolve a flexible segment definition language supporting complex targeting scenariosBuild scalable evaluation engines for processing large-scale entity and relationship dataImplement relationship-based audience res...

Remote NATO Secret Clearance Required Occasional Travel to The HagueWe are supporting NATO in the continued development and evolution of NIRIS (Networked Interoperable Real-Time Information Services) a critical interoperability platform used across multinational defence environments.We are looking...

We are looking to hire a Senior Java Developer who will take part in development and maintenance services for customized software solutions for large European customer a provider of innovative software solutions for the public sector.The client is a technology service provider specializing in digita...

Youll design and build workflow automation systems using BPMN/DMN/CMMN modeling integrate them with other services and keep them running reliably in production. Youll also talk to non-technical stakeholders regularly so clear communication matters as much as clean code.Day to day youll be:Building a...

Type of contract: B2B contractSalary range: 125-160 PLN/HWhat will you doYou will build and evolve high-performance backend services and APIs for modern large-scale digital platforms used by a global financial services client working hands-on in a collaborative international environment with a stron...

Type of contract: B2B contractSalary range: 125-160 PLN/HWhat will you doYou will build and evolve high-performance backend services and APIs for modern large-scale digital platforms used by a global financial services client working hands-on in a collaborative international environment with a stron...

Position Description:We are looking for a Developer Intern to join a 2-person dev group in the ERP systems area. This role is dedicated to students with high academic potential who want to grow in Java technologies and work with advanced tech frameworks. The position requires attention to code quali...

Typeofcontract:employment contractSalary range: 14 580 - 22 350 PLN grossWhat will you doYou will work as a Senior Java/Python Engineer with React on enterprise-grade applications contributing to architecture decisions designing and implementing scalable solutions and continuously improving user exp...

Location: Hybrid (Warsaw Inflancka 4a) You will work on STS project. STS is the central message broker in the Danish municipal software landscape. The system handles and distributes information about different events between public citizen databases and case/benefit systems. The development team is...

For our client we are looking for a Java Developer (TMS) - Analyst to join the team in Warsaw.Location: Warsaw (Poland)Working model: hybrid (4 days/week on-site)Contract type: CoE/B2BStart/End project: 01.06.2026 to 31.05.2027Job Responsibilities Design and implementation of IT solutions based on t...

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...

Job description Hello World!Jesteśmy The Codest międzynarodową firmą technologiczną z siedzibą w Londynie oraz hubami technologicznymi w Polsce.Od lat specjalizujemy się w tworzeniu aplikacji webowych rozwiązaniach chmurowych utrzymaniu i rozwoju systemów oraz zapewnianiu jakości oprogramowania. Pr...

Job description Hello World!Jesteśmy The Codest międzynarodową firmą technologiczną z siedzibą w Londynie oraz hubami technologicznymi w Polsce.Od lat specjalizujemy się w tworzeniu aplikacji webowych rozwiązaniach chmurowych utrzymaniu i rozwoju systemów oraz zapewnianiu jakości oprogramowania. Pr...

We are seeking a skilled and detail-oriented Java developer to join the Payments Engineering team. The candidate will work in a pod with 3-4 experienced Java developers and focus on adapting legacy applications for non-discretionary ISO20022 changes which is a new financial messaging standard. An id...

As a leading financial services and healthcare technology company based on revenue SS&C is headquartered in Windsor Connecticut and has 27000 employees in 35 countries. Some 20000 financial services and healthcare organizations from the worlds largest companies to small and mid-market firms rely on...