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# Senior Java Developer - Technical Lead

- **Company:** Halian
- **Location:** Brussel, Belgium
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Spring Security, Apache ActiveMQ, Application Programming Interfaces (APIs), Amazon Web Services, Server Applications, JIRA, Microsoft Azure, Software Documentation, Software Quality, Code Review, Databases, Linux, Java Platform Enterprise Edition (J2EE), Glassfish Application Servers, Spring Framework, WildFly (JBoss AS), Apache Maven, Microsoft SQL Server, OAuth, Open Web Application Security, PCI Data Security Standards, Release Management, JSON Web Token, Security Assertion Markup Language (SAML), Secure Coding, Simple Object Access Protocol (SOAP), Systems Integration, Multithreading, Java Application Server, ReactJS, Concurrency, Software Security, Backend, Git, Kubernetes, Bitbucket, Restful APIs, Docker, Jenkins
- **Published:** October 31, 2026
- **Apply:** https://www.careerjet.be/jobad/be22530ecc612d09d35e1219a40923ea19

## About the Role

* Degree in IT or equivalent professional experience, with at least 5 years of relevant experience for a senior-level profile and strong hands-on Java development expertise.
 * Strong knowledge of Java 7/8/11/17, Spring, JEE, RESTful Web Services, SOAP, concurrency and multithreading, with experience designing and integrating backend applications and APIs.
 * Experience with development and delivery tools including Maven, Jenkins, Git, Bitbucket, Jira, application servers such as GlassFish and WildFly, and databases such as Microsoft SQL Server.
 * Knowledge of modern development environments and technologies such as Docker, Docker Compose, Kubernetes, ReactJS, ActiveMQ/OpenMQ, Linux/Unix, and cloud platforms such as AWS, Azure, or GCP is an advantage.
 * Strong understanding of secure development practices, including OWASP Top Ten, OAuth, JWT, SAML, encryption, API security, Spring Security, dependency management, and standards such as GDPR and PCI-DSS.
 * Strong communication, collaboration, and ownership skills, with experience working in Agile/Scrum environments and interacting with both technical teams and business users; fluent English plus Dutch or French is required.

## Description

* Design and oversee the technical architecture of Java applications while developing robust, scalable backend solutions.
 * Lead technical decision-making, conduct code reviews, resolve complex technical challenges, and ensure high standards of code quality.
 * Coach and mentor Java developers, share technical knowledge, and collaborate closely with Product Owners, business users, and other stakeholders.
 * Translate business requirements and functional specifications into technical solutions, delivering new applications and enhancements within agreed scope and planning.
 * Maintain and improve existing applications by handling technical requests, resolving bugs, performing root-cause analysis, and implementing sustainable improvements.
 * Contribute to release management, testing, technical and user documentation, application support, and the continuous improvement of development processes, tools, security, and technologies.