Senior Full-Stack Engineer – Enterprise API & Cloud

Altia; Brussel Hoofdstad; On-site; EUR 90,000 - 130,000; Full time

Job summary

Altia is seeking a Senior Full-stack Software Engineer to join our team of IT professionals. You will contribute to the design and development of secure, scalable enterprise applications across Europe, working with Java, Spring Boot, Jakarta EE, and JSF.

You will own API development, integration, and testing within containerised deployments. You should bring a Master’s degree with extensive experience, strong English or French skills, and a proven ability to work autonomously in an international

Qualifications

• Master's degree (EQF 7) and at least 15 years of IT experience.
• English or French at B2 or higher, both written and spoken.
• Ability to onboard quickly, work autonomously and collaboratively, participate effectively in meetings and deliver results.
• Strong knowledge of JavaScript, HTML and CSS.
• Experience with JSF.
• Strong experience with Java, Jakarta EE, Spring Boot, JPA and Hibernate.
• Experience designing scalable applications, business logic and REST APIs.
• Knowledge of front-end, back-end and external system integration.
• Experience with relational databases (Oracle, PostgreSQL) and NoSQL (Redis).
• Experience with Kafka for asynchronous processing and messaging.
• Experience with REST APIs and OpenAPI/Swagger.
• Authentication/authorisation protocols: OAuth 2.0, OpenID Connect, JWT.

Responsibilities

• Design and develop front-end and back-end solutions.
• Develop and integrate REST APIs and services.
• Optimise databases and ensure secure architecture.
• Implement security measures and automated tests.
• Set up CI/CD pipelines and containerised deployments.
• Collaborate across teams and document technical decisions.

Skills

JavaScript

HTML

CSS

Java

Jakarta EE

Spring Boot

REST APIs

OAuth 2.0/OpenID Connect/JWT

Kafka

JUnit/Testing

CI/CD

Docker

Kubernetes

Git/GitLab

OpenAPI/Swagger

Security best practices

Education

Master's degree or equivalent (EQF 7)

15+ years of IT experience

Tools

Jira

Job description

Altia is seeking a Senior Full-stack Software Engineer to join our team of IT professionals. You will contribute to the design and development of secure, scalable enterprise applications across Europe, working with Java, Spring Boot, Jakarta EE, and JSF.

You will own API development, integration, and testing within containerised deployments. You should bring a Master’s degree with extensive experience, strong English or French skills, and a proven ability to work autonomously in an international