Senior Full Stack Developer Consultant

Keystone Solutions; Brussel Hoofdstad; On-site; EUR 55,000 - 75,000; Full time

Job summary

Keystone Solutions is seeking a skilled Fullstack Developer to design, develop, and maintain web applications for health-sector projects at client sites. You will work with Java, Angular, and modern tooling to deliver robust features and high-quality code.

You will collaborate with cross-functional teams, implement TDD, write tests, and mentor junior developers while staying up-to-date with the latest technologies.

Qualifications

• Proven experience as a Fullstack Developer.

Responsibilities

• Develop and maintain web applications using Java, Angular, and other relevant technologies.

Skills

Angular & Typescript

Elasticsearch

HTML & CSS

Java

JUnit 5

PostgreSQL

Spring Boot

Spring Data JPA

Tools

Docker

Gitlab CI/CD

Jenkins

Tomcat

Job description

Mission Overview:

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.

Key Responsibilities:

• 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.

Required Knowledge and Skills:

Experience:

• 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).

Duration: As soon as possible - 30/06/2027 9 months (full time)

Skills required:

• 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

Language requirements:

Dutch
Level Active knowledge
English
Level Active knowledge
French
Level Active knowledge