Hoboken Antwerpen | Junior Java Developer

A.S.Adventure; Hoboken (NJ); On-site; USD 70,000 - 110,000; Full time

Benefits offered by this job

Company car

Meal vouchers

Group insurance

Hospitalisation insurance

Additional holidays

Staff discount

Job summary

A.S.Adventure in Hoboken is hiring a junior backend developer to build real backend features, APIs and data queries using Java, Spring Boot and AWS. You will work closely with senior engineers and learn our architectural patterns.

This role requires 0-3 years of backend experience, proficiency in Java, REST APIs, Git and databases. Working languages are Dutch and English; on-site in Hoboken with opportunities to grow and learn AI-enabled tooling.

Qualifications

• 0-3 years backend experience.
• You can write and understand Java; Spring Boot and AWS come with the job.
• Team language is Dutch and English; good communication required.
• Experience with REST APIs and HTTP requests/responses.
• Hands-on time with Git and a database (SQL or NoSQL).

Responsibilities

• Build real backend features, API endpoints, and database queries with Java.
• Work closely with senior engineers and follow architectural patterns.
• Write unit and integration tests from day one; participate in code reviews.
• Understand security and privacy considerations beyond checklists.
• Own your sprint work; collaborate in stand-ups and refinements.
• Learn AI/LlM tooling and apply patterns under guidance.

Skills

Java

Spring Boot

AWS

REST APIs

Git

Education

Bachelor's degree in Computer Science or related field

Tools

PostgreSQL

NoSQL

Job description

We are convinced that outside is exciting, relaxing and inspiring. Its versatile, for some it is a place to relax, for others it is the ultimate challenge. A place to enjoy and where big and small moments come together. It is a place to be discovered or to be recognized. But the outdoors can also be treacherous and unpredictable. Weather and terrain can surprise you. Our mission is to enable all people to spend inspiring and epic moments outside.

Yonderland is a European group of premium brands and retail concepts focused on outdoor. Including A.S. Adventure, Juttu, Bever, Cotswold, Snow+Rock, Runnersneed and Ayacucho. Yonderland runs over 190 shops in Belgium, Luxembourg, France, Great-Britain and The Netherlands and resides in Belgium.

We run Java 21/25 in production. Around it sits Spring Boot microservices on AWS, event-driven systems, and multiple PostgreSQL and Cassandra databases, with caching layers. Services run in Docker, and we test with JUnit and Testcontainers. You don’t need to know this exact stack when you start, as long as you’re eager to learn.

Your challenge

• You’ll build real backend features, API endpoints, and database queries, working closely with senior engineers and picking up our architectural patterns and coding standards as you go.
• Writing tests is part of the job from day one, unit and integration tests you would trust yourself. Code review goes in both directions here, so very soon you’ll be reviewing other people’s code too.
• Secure and privacy-aware code matters to us, and we want you to understand why we handle validation, error handling and logging the way we do, instead of just following a checklist.
• Your sprint work is yours to own. Pair up with colleagues, speak up in stand-ups, refinements and retros; we would much rather hear a question early than find a bug later.
• You’ll pick up core backend architecture concepts, microservices, APIs, data access, caching, and start applying the patterns and frameworks your senior colleagues use every day.
• Build a working knowledge of AI and LLM APIs, and stay curious about how AI-powered features work and how they affect backend responsibilities. You’ll use AI coding tools under supervision, with peer review and guidance from senior engineers along the way.

Je uitrusting

• 0-3 years of backend experience. Motivation and how quickly you grow matter more to us than the number of years.
• You can write and understand Java and you want to get good at writing it well. Spring Boot and AWS come with the job.
• Our working languages are Dutch and English.
• You’ve worked with REST APIs and know your way around HTTP requests and responses.
• Hands-on time with Git and with a database, SQL or NoSQL.
• When something breaks, you want to understand the cause before you fix the symptom, and you’re comfortable saying "I don't know yet" out loud.

Onze troeven

• A versatile position with pronounced responsibility and variety in a strongly growing and innovative market leader, operating internationally with headquarters in Hoboken (Antwerp) and offices in the Netherlands and the UK.
• The IT organisation is a driving force to support the strong growth and you will help shape it.
• An open corporate culture where you can be yourself.
• A competitive gross monthly salary in proportion to your experience, including the possibility of a company car, supplemented by fringe benefits such as meal vouchers, group and hospitalisation insurance, additional holidays, and staff discount.
• Adventurous colleagues in an international and diverse team.
• The opportunity to participate in our bootcamps (showers available) and various team events twice a week during the lunch break.
• We welcome applications from everyone, regardless of age, background, gender, sexual orientation, disability, or belief. Your talent is what matters most.