Mid-Senior Java Developer - On-Site in Brussels, Belgium

About Trasys International Trasys International partners with EU Institutions, supporting digital transformation projects across Europe. With more than 30 years of experience, the company focuses on delivering solutions in modernization, digital workspaces, cloud technologies, and IT security. Headquarters are in Brussels, and teams operate in cities such as…

Join our dynamic team at Sopra Steria as a People Manager specializing in Java development. In this role, you will lead a talented group of developers and testers, fostering a collaborative environment while driving project success. Your leadership will be crucial in aligning team objectives with company goals, ensuring high-quality results in software development.As a People Manager, you will be responsible for mentoring your team, facilitating professional growth, and implementing best practices in coding and testing. You will also work closely with stakeholders to understand project requirements and deliver innovative solutions.

About Brainsquare Brainsquare focuses on building, improving, and supporting large-scale enterprise application environments. The team brings together practical engineering skills and a structured delivery mindset, working where application development, integration, and collaboration platforms intersect. Brainsquare teams often work with clients over the long term, helping to scale, stabilize, and evolve complex systems. Role Overview: Senior Java Software Engineer This long-term position is based in Brussels and centers on both developing new features and continuously improving existing Java applications. The work goes beyond standard development, blending build and run responsibilities with a strong sense of ownership for the full application lifecycle. What You Will Do Take part in functional analysis and challenge specifications to ensure clarity and feasibility Design, develop, and maintain Java-based applications Maintain high code quality through code reviews and structured delivery practices Test and validate developments before user acceptance Investigate incidents, identify root causes, and implement lasting solutions Update and improve existing systems and their documentation Support business users to keep applications running smoothly Contribute to support processes, reporting, and monitoring application availability Work closely with both IT and business stakeholders Participate in support rotations as needed Location Brussels, Brussels, Belgium

About Trasys International Trasys International partners with EU Institutions, delivering IT solutions for over 30 years. Headquartered in Brussels, the company supports digital transformation for public sector clients across Europe. Service areas include solution modernization, digital workspaces, cloud technologies, and IT security. Offices and active accounts span Luxembourg, Amsterdam, Athens, Stockholm, and Geneva. Role Overview: Junior Java Developer (Near-Site in Brussels) This Junior Java Developer role supports a key European Institution client in Brussels. The position focuses on Java development within a large-scale, multicultural public sector environment. What We Look For Experience in Java development, ideally in sizable project teams Background working in multicultural or public sector settings Trasys International welcomes professionals motivated to contribute to international projects and deliver results in diverse teams.

We are seeking a highly skilled Java Architect to join our innovative team at nrb in Brussels. The ideal candidate will have extensive experience in designing and implementing robust Java applications. This role requires a strong understanding of Java frameworks, architecture patterns, and best practices.

Join the dynamic team at ARHS Group, a proud member of Accenture, where we are seeking a skilled Java Fullstack Developer to enhance our capabilities in Brussels, Belgium.Key Responsibilities:Develop robust applications using Java with a focus on the Spring framework or JEE.Write high-quality, testable, and efficient code while following best practices in software development.Utilize strong database skills and proficiently handle SQL queries.Embrace a DevOps mentality to streamline processes.Implement and work with microservices architectures.Use testing frameworks and tools to ensure application reliability.Adapt to Agile methodologies including Scrum, Jira, Confluence, code reviews, and user story development.Collaborate with cross-functional teams to deliver high-quality software solutions.Propose innovative solutions and demonstrate a proactive attitude.Maintain a results-oriented approach to achieve project objectives.Fluency in English and French is essential.A willingness to engage in full-stack development with experience in Angular considered a plus.At ARHS Group, we value collaboration, learning, and building strong relationships with our clients, colleagues, and communities. We offer flexible working arrangements to meet your work/life needs while encouraging in-person interactions.

We are seeking a highly skilled Application Architect (Java) who is fluent in English to join our dynamic team in Brussels, Belgium. The successful candidate will provide expert services either at our headquarters or directly at client sites. Initially, the architect will collaborate closely with a prominent client's IT team on-site.Key Responsibilities:Develop and maintain robust software applications.Design and implement component architectures and foundational blocks for a web content management system.Analyze the integration of various information systems.Conduct data analysis and modeling.Create comprehensive software architecture documentation.Participate in technical working groups, progress meetings, and user consultations.Support testing, analysis, technical documentation, deployment, evaluation, and reporting processes.Review existing system architectures to facilitate migration to cloud environments.Assist in testing and providing technical training.Draft technical documentation.Support deployment and system configuration.Provide assistance in resolving production issues as required.

Join our innovative team as a Java Software Architect where you will play a pivotal role in designing and implementing cutting-edge software solutions. You will collaborate with cross-functional teams to drive the development of scalable, robust applications that meet the needs of our clients.

Join Sopra Steria as a Java Technical Lead where you will play a pivotal role in guiding our development teams in designing and implementing robust software solutions. You will leverage your expertise in Java technologies to ensure high performance and responsiveness to requests from the front-end.Your responsibilities will include leading technical discussions, mentoring team members, and collaborating with stakeholders to define project requirements. We are looking for a leader who is passionate about technology and can drive innovation within our projects.

Join Sopra Steria as a Java Software Architect, where you will play a pivotal role in designing and developing robust software solutions. Your expertise will guide our technical direction and ensure the successful implementation of Java-based applications.

Join Netcompany at the cutting edge of technology as a Senior Enterprise Java Architect – Backend & Integration. In this pivotal role, you will:Offer expert insights into the development of enterprise policies and strategies concerning content, records, archives, and information management, which includes capture, selection, retention, and digital preservation.Lead the architecture, design, and upkeep of records, archives, and information management systems while supervising the technical execution of new or updated policies.Conduct requirement analysis and define needs for content, records, archives, and information management systems, creating functional and technical specifications for backend and integration solutions.Design system integration and data migration strategies for legacy repositories, ensuring seamless transitions with minimal disruption.Develop and sustain robust solutions for long-term digital preservation and archiving, complying with legal, security, and compliance standards including encryption, digital signatures, secure access, and data protection.Establish and apply metadata standards for content and records management to facilitate effective archival description and retrieval.Design and implement scalable data publication and exchange solutions, utilizing linked open data, semantic web technologies, and modern API/integration frameworks.

Join Sopra Steria as a Java Technical Lead in our Brussels office, where you will play a pivotal role in leading innovative software development projects. You will guide a team of talented developers, ensuring the delivery of high-quality solutions that meet our clients' needs.

We are excited to announce a vacancy for a Senior Application Architect (Java) who is fluent in English to join our dynamic team in Brussels, Belgium. This role involves working on-site at client locations or from our company's premises. The successful candidate will play a pivotal role in collaborating with a major client's IT team, contributing their expertise to ensure successful project outcomes.Your Responsibilities:Conduct thorough analysis and integration of various information systems and components.Engage in comprehensive data analysis and modeling activities.Lead the coordination of technical architecture implementation.Design, develop, and maintain applications that meet specified requirements.Contribute to the deployment and configuration of systems.Create detailed software architecture documentation.Support Project and Stakeholder Management efforts.Participate actively in technical working groups, progress meetings, and discussions with the Project Team.Assist in testing, analysis, documentation, deployment, evaluation, and reporting processes.Design and create blueprints for Cloud Architecture, including reviewing existing systems for potential cloud migration.Develop architecture components and building blocks utilizing cloud technologies.

Role Overview everience is seeking a Senior Fullstack Consultant with strong experience in Python and React for its Brussels team. This is a spontaneous application opportunity for professionals ready to contribute to digital transformation projects across both front-end and back-end development. What You Will Do Develop and maintain applications using Python for backend and React for frontend components Collaborate with clients and internal teams to deliver solutions that support their digital initiatives Contribute technical expertise throughout the project lifecycle, from design to deployment Who We’re Looking For Proven experience with both Python and React Comfortable working across front-end and back-end tasks Interest in consulting and supporting digital transformation for clients Location This position is based in Brussels.

We are excited to announce an opening for a Senior Java Application Architect fluent in English, to contribute as a key expert from anywhere within the EU. The selected candidate will join our Development team and engage closely with a prominent client’s IT team on-site.Key Responsibilities:Architect and design sophisticated information systems.Develop architectural components and essential building blocks.Create comprehensive software architecture documentation.Design application data models and workflow models.Develop APIs using appropriate frameworks such as REST and Swagger.Build software components utilizing back-end technologies like Java Spring and JPA.Implement application integration with corporate IAM services for authentication and authorization.Ensure timely delivery via CI/CD pipelines.

European Dynamics is hiring a Senior Application Architect (Java, Angular) to work remotely from within the EU. The position centers on designing and guiding the architecture of information systems in partnership with a client IT team based in Brussels. English fluency is essential. What you will do Design and architect information systems tailored to business requirements. Evaluate existing system architectures and suggest improvements. Develop core architectural components and building blocks. Analyze integration between various information systems. Lead the implementation of technical architecture decisions. Document software architecture thoroughly. Take part in technical working groups, progress meetings, and user consultations. Create data and workflow models for applications. Develop application APIs using REST and Swagger frameworks. Build and implement software components using Java Spring and JPA. Integrate applications with corporate IAM services for authentication and authorization. Support software delivery using a CI/CD pipeline. Collaboration and location This is a remote role focused on collaboration with a client team in Brussels, Belgium.

Join our dynamic and innovative team at AppTweak as a passionate Frontend Developer, and help us scale new heights! In this role, you will collaborate closely with our backend developers to create seamless client-side logic, while also bridging the gap between visual elements and the server-side architecture.You will report directly to your Engineering Manager and work alongside a talented squad of developers. For more insights, check out our Tech Stack page!

We are excited to announce a current opening for a Senior Application Architect (Spring, React) fluent in English, to join our expert team based in Brussels, Belgium. The role involves providing high-level architectural expertise, working either from our company premises or directly at client locations. As part of this initial assignment, the successful candidate will be integrated into our Development team, collaborating closely with a prestigious client's IT team on-site.Key ResponsibilitiesGather and analyze project requirements, assessing task feasibility and proposing secure solutions;Select a secure technology stack that meets project specifications;Develop all secure application components for both backend and frontend;Deliver high-security and quality products through rigorous testing;Provide support to the onsite team, including deployments and documentation;Implement and develop applications with stringent IT security measures, including secure web services.

Join Sopra Steria as a Java Cloud Engineer, where you will play a pivotal role in developing cloud-based solutions that enhance our clients' operations. Engage with cutting-edge technologies and transform innovative ideas into efficient applications. This position offers an exciting opportunity to work with a talented team in a dynamic environment, focusing on delivering high-quality software solutions.

Are you ready for a new opportunity? Seeking fresh challenges to elevate your career?Join our dynamic Local Managed Staffing team at NRB as a .NET Developer specializing in Blazor!The NRB Group is a prominent leader in Belgium's ICT landscape, delivering a diverse array of IT services tailored to meet all of your technological requirements, from Infrastructure & Cloud solutions to Software Development, Consultancy, and Managed Staffing.Discover more about us here.We are currently seeking a skilled .NET Developer with a strong foundation in Blazor.