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# Senior Full Stack Developer Consultant

- **Company:** Keystone Solutions
- **Location:** Brussel, Belgium
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Spring Security, Artificial Intelligence, Apache Tomcat, Unit Testing, Cascading Style Sheets (CSS), Software Quality, Databases, Continuous Integration, Elasticsearch, Java Persistence API, Junit, PostgreSQL, Nginx, OpenShift, E2e Testing, Mockito, Angular 2+, Software Engineering, Software Systems, TypeScript, Web Applications, Test-Driven Development (TDD), Large Language Models, Prompt Engineering, Spring-boot, Backend, Vue.js, AngularJS, Gitlab-ci, Integration Tests, Kubernetes, Front End Software Development, Docker, Jenkins
- **Published:** October 13, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=59e2b89078276101

## About the Role

* Proven experience as a Fullstack Developer.
 * Common AI Knowledge (EU AI Act, LLMs, harnesses, Security and confidentiality).

Technical Skills:

 * Front-end: Angular, Typescript, CSS/SCSS, Vue.js.
 * Back-end: Java, Spring Boot (4.x), Spring Security, Artemis, Spring Data JPA (Jakarta), Postgres, Flyway, QueryDsl, Junit6, assertj, Mockito.
 * Database: PostgreSQL, Elasticsearch.
 * IA: prompt engineering, Agents, skills, MCP.

The candidate must be fluent in either French or Dutch and have an understanding of the other language.

Nice to have:

 * Tools: Docker, Tomcat, Nginx, Gitlab CI/CD, Jenkins, GHCP.

Preferred Qualifications:

 * Experience with Spring Boot applications and hexagonal architecture.
 * Experience with workload deployed on Kubernetes (Openshift).
 * Familiarity with modern development practices such as CI/CD and containerization.
 * Knowledge of application development for various sectors including healthcare, environmental conservation, and public safety.

Personal Attributes:

 * Strong problem-solving skills and a keen attention to detail.
 * Excellent communication and teamwork skills.
 * Ability to work independently and manage multiple projects simultaneously.
 * A proactive attitude towards learning and implementing new technologies.
 * Ability to adapt to standards regarding AI (fast evolving).

If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today ., * Angular & Typescript - Level: Confirmed - Most recent: Any time

 * Elasticsearch - Level: Confirmed - Most recent: Any time
 * Html en CSS - Level: Confirmed - Most recent: Any time
 * Java 25 - Level: Confirmed - Most recent: Any time
 * junit 5 - Level: Confirmed - Most recent: Any time
 * PostgreSQL - Level: Confirmed - Most recent: Any time
 * Spring Boot - Level: Confirmed - Most recent: Any time
 * Spring Data JPA - Level: Confirmed - Most recent: Any time

## Description

As a Fullstack Developer, you will play a critical role in designing, developing, and maintaining high-quality software solutions at a client site, representing Keystone Solutions. You will work closely with our clients to understand their requirements and deliver solutions that exceed their expectations. Your expertise in both front-end and back-end technologies will be essential in ensuring the success of our projects., * Develop and maintain web applications using Java, Angular, and other relevant technologies.

 * Collaborate with cross-functional teams to define, design, and ship new features.
 * Ensure the performance, quality, and responsiveness of applications.
 * Identify and correct bottlenecks and fix bugs.
 * Help maintain code quality, organization, and automation.
 * Provide technical guidance and mentorship to junior developers.
 * Stay up-to-date with the latest industry trends and technologies to bring innovative solutions to the team.
 * Implement and adhere to Test-Driven Development (TDD) practices to ensure robust, high-quality code.
 * Write and execute unit tests, integration tests, and end-to-end tests.

Project Context:

You will be joining our project, focusing on the development of Webcomponents that manage patient referral prescriptions, Vitalink, or other applications related to the health sector.