Mid-level Java Back-end Developer - Dutch Speaker and Writer

TESTQ Technologies LTD.; Netherlands; Hybrid; EUR 83,000 - 124,000; Full time

Job summary

TESTQ Technologies LTD. seeks a Mid-level Java Back-end Developer to join our DevOps teams in a hybrid setup (3 days office). You will design, build, and operate microservice backends using Java 17+ and Spring Boot, emphasize Clean Code and design patterns, and contribute to CI/CD automation and testing.

Requirements include completed MBO/HBO/WO, excellent Dutch language skills, and hands-on experience with Maven, Git, Docker, and related tooling. Energy sector experience is a plus.

Qualifications

• Completed MBO/HBO/WO education.
• Experience with Java 17+ and Spring Boot.
• Knowledge of design patterns and Clean Code.
• Understanding of test levels (unit, functional, API, mocking, E2E).
• Excellent command of Dutch, written and spoken.

Responsibilities

• Design, build, and run backend systems in a microservice landscape.
• Contribute to CI/CD, automated quality controls, and testing.
• Participate in design and refinement sessions and incident management.
• Apply security, quality, and availability best practices.

Skills

Java

Spring Boot

Design patterns

Clean Code

Test levels

Dutch language

Education

MBO/HBO/WO education completed

Tools

Maven

Git

Docker

Ansible

MongoDB

CI/CD tooling

OTAP development chains

Linux scripting

REST

Elasticsearch

Logstash

Kibana

Grafana

Playwright

Cucumber

Axon Framework

Job description

TQUSI0975_5998 - Mid-level Java Back-end Developer - Dutch Speaker and Writer

Job Type: Contract

Work Mode: Hybrid (3 Days from office)

Activities

• As a Mid-level Java Back-end Developer, you will be part of the growing DevOps teams and make a crucial contribution to the rapid development and reliable operation.
• Designing, building, and running various backend systems in the microservice landscape
• Ensure appropriate (minimal) documentation, reporting, and formalization
• Actively contribute to design and refinement sessions
• Applying best practices in the areas of security, quality, and availability
• Contribute to automated quality controls in the CI/CD pipeline
• Creating and executing automated unit and integration tests
• Participate in the regular DevOps incident management process
• You have at least a completed MBO, HBO, or WO education.
• You have experience with Java 17+ and Spring Boot.
• You have experience using design patterns and methodologies and an opinion on Clean Code.
• You have insight into different test levels (unit tests, functional tests, API tests, mocking, end-to-end tests)
• You have an excellent command of the Dutch language, both written and spoken.

Wishes

• You have experience with Kotlin
• You have experience with build & deployment tools such as: Maven, GIT, Docker, Ansible
• You have experience with NoSQL databases, particularly MongoDB.
• You have practical experience with CI/CD tooling and activation processes, hands-on experience with setting up and maintaining OTAP development chains and tooling, experience with Linux and scripting, insight into API implementations such as REST, insight into logging and monitoring with Elastic, LogStash, Kibana, and Grafana, insight into end-to-end testing with Playwright and Cucumber, and experience with CQRS Patterns and tooling (Axon Framework).
• You have experience in the energy sector