Java Software Engineer

act digital; Den Haag; On-site; EUR 90,000 - 120,000; Full time

Job summary

act digital is seeking a senior Java developer to design and build enterprise-scale systems in a microservices architecture. You will implement RESTful services, integrate with search tools, and ensure secure, scalable backend code.

The role requires strong experience with Java 21+, Spring Boot, Docker/Kubernetes, and CI/CD pipelines. You will work in an Agile team, write tests, and contribute to technical documentation.

Qualifications

• Minimum 6 years of professional Java development experience.
• Extensive Spring and Spring Boot expertise.
• Experience building microservices and REST APIs.
• Proficient with Docker, Kubernetes and CI/CD tooling.
• Familiar with Kafka/ActiveMQ messaging.
• Knowledge of SQL Databases and ORM (Spring Data/Hibernate).
• Experience with Agile methodologies.
• Background in biometric/identity management is a plus.

Responsibilities

• Design and implement production-grade systems with messaging and microservices.
• Develop Java backend and integration with search engines, focusing on reliability and performance.
• Write OAuth authentication and validation tests.
• Assist with deployment, config, and CI/CD pipelines; container orchestration.
• Follow Scrum practices and estimate work.
• Produce technical documentation and ensure secure coding, logging, auditing.
• Collaborate with team using Git PR workflow.
• Deliver clean, secure, high-quality code.

Skills

Java 21+ experience

Spring Framework

Microservices

REST API development

Agile (Scrum/Kanban)

Security & authentication

Unit & integration testing

Reactive programming

OAuth security

Technical documentation

Tools

Docker

Kubernetes

Kafka/ActiveMQ

Azure DevOps/TFS

Git

Maven

IntelliJ/Eclipse

Spring Data/Hibernate

Camel/Spring Integration

Biometric/Identity management systems

Job description

We will only consider the candidates who fulfill ALL the mandatory requirements.

NOTE:

The selected candidate will have to show a certificate of good conduct.

Task to be performed:

• Design and develop production grade, enterprise level systems that make extensive use of messaging and microservices.
• Participate in the Java implementation of applications and micro-services involving integration with search engines, being able to write backend code in a reliable, fast, scalable, and secure way, satisfying requirements and service level agreements following both a functional and reactive programming approach.
• Write OAUTH authentication mechanisms. Implement validation mechanisms as unit and integration tests.
• Assist with deployment and configuration of the system. Setup CI/CD pipelines. Familiarity with Kubernetes/Docker is assumed.
• Follow Scrum procedures and disciplines. Estimate the work to be done upon request.
• Write technical documentation. Account for secure coding practices, as well as logging and auditing features.
• Work with Git following pull request procedure.
• Write clean, secure and high-quality code

Mandatory Requirements

• Minimum 6 years of professional experience with Java development
• Strong experience with Java 21+, Spring and Spring Boot
• Experience with microservices and REST API development
• Experience with Docker and Kubernetes
• Experience with Kafka and/or ActiveMQ
• Experience with CI/CD systems (Azure DevOps/TFS)
• Experience with Microsoft SQL Server, Spring Data and Hibernate
• Knowledge of Git, Maven and IntelliJ/Eclipse
• Experience with Agile methodologies (Scrum/Kanban)
• Experience with Apache Camel or Spring Integration
• Professional experience with biometric and identity management solutions.