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Sansaone

Junior Java Developer

Sansaone
Belgium · Full-time · Mid-Senior


Role: Full stack java Developer

Location: Brussels, Belgium

Duration: 12 months

Languages: ENG

Work Mode: Hybrid


Job Description:

So, what are the main responsibilities of a Java Full Stack Developer in Client location?

We are seeking an experienced Full Stack Developer to support digital solutions and application development initiatives. The successful consultant will contribute to the design, development, deployment, and maintenance of modern web applications, working across the full technology stack while ensuring scalability, security, performance, and compliance with EU Institution standards.

As a Java Full Stack Developer, you will:

Design, develop, and maintain responsive web applications across front-end and back-end layers.

Develop front-end architectures, user interfaces, and user interactions using modern web technologies.

Implement business logic, RESTful APIs, and server-side components using Java-based technologies.

Design and optimize relational and non-relational database solutions, ensuring data integrity and performance.

Apply secure development practices, including authentication, authorization, input validation, logging, and monitoring.

Perform unit and integration testing, debugging, issue resolution, and code validation activities.

Deploy, manage, and support applications in cloud environments using CI/CD pipelines and containerization technologies.

Produce technical documentation and collaborate with cross-functional teams to ensure seamless integration of system components.

Qualifications

What would make you a fit for the role:

Degree in Computer Science, Information Technology, Software Engineering, or a related field and minimum 6 years of professional experience as a Full-stack Software Engineer or in a similar software development role.

Strong expertise in Java development, including Spring Boot, Hibernate, and REST API implementation.

Solid knowledge of front-end technologies such as JavaScript, HTML, CSS, and modern frameworks including Angular, React, or Vue.js.

Experience with relational databases (PostgreSQL, Oracle) and non-relational databases (MongoDB), including schema design and query optimization.

Hands-on experience with cloud platforms such as AWS or Microsoft Azure and deployment of cloud-native applications.

Experience with containerization and orchestration technologies such as Docker and Kubernetes, as well as CI/CD pipeline implementation.

Knowledge of software security best practices, including OAuth 2.0, OpenID Connect, JWT, and secure application development principles.

Strong teamwork, communication, and stakeholder collaboration skills in multicultural environments.

Professional proficiency in English, both written and spoken.



Key Skills

Ranked by relevance

java cloud containerization cicd restful apis spring boot javascript kubernetes postgresql responsive angular docker oracle server react oauth css aws
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Posted
Jul 07, 2026
Type
Full-time
Level
Mid-Senior
Location
Brussels
Company
Sansaone

Industries

IT System Testing Evaluation

Categories

Public Relations

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