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Senior Java/React/Kubernetes Developer - Hybrid - The Hague - Contractor

Contract Netherlands, Den Helder
For an international institution based in The Hague (Den Haag, Netherlands), we are urgently looking for a Hybrid Senior Java Developer with React and Kubernetes. Travel 1 week to The Hague every 6 weeks!

As Senior Java Developer, you will become part of a bigger service, composed by Project Managers, Business Analyst, Solution Architects, Developers and Testers to reinforce this growing team.

This position is open for contractors, who would like to commit long-term. 

Candidates need to be fluent in English. Workpermit is not provided.

Tasks and responsibilities:

  • Contributing to the improvement of the development and build process;
  • Ability to design and develop production grade, enterprise level systems that make extensive use of messaging and microservices;
  • Participate in the Java implementation of a micro-services solution, being able to write backend code in a reliable, fast, scalable, and secure way, satisfying requirements and service level agreements;
  • Write OAUTH authentication mechanisms. Implement validation mechanisms as unit and integration tests;
  • Assistance with deployment and configuration of the system. Setup CI/CD pipelines. Familiarity with Kubernetes/Docker, is assumed;
  • Work comfortably within a team. 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;
  • Communicate in a clean, concise way, not only to peers but to upper layers when needed;
  • Hands on experience with Git following pull request procedure. Ability to write clean, secure and high quality code;


  • Bachelor or Master degree;
  • +7 years experience in front-end and back-end development using microservices, Java, Spring Boot, React / Redux and state containers;
  • Experience with React user interface development is considered an asset;
  • Proven and extensive experience in Cloud and Microservices e.g. Docker, Kubernetes, GCP, AWS;
  • Knowledge of security implementations like: OAuth2 / OpenID Connect, TLS, PKCS, Keycloak;
  • Significant experience with cloud deployments (e.g. GCP and Azure), Kubernetes, DevOps and infrastructure engineering;
  • In-depth knowledge of Experience with data storage/manipulation such as: JSON, JsonSchema, XML, XSLT, DTD, SQL, PDF and with SQL and non-SQL databases such as MongoDB or MySQL;
  • Hands-on experience with messaging services e.g. RabbitMQ or Kafka with Business rules engines e.g. Camunda;
  • Skilled in software development in a Kubernetes-based infrastructure, networking policies, LBs, deployment strategies and cluster security;
  • Knowledge of CI/CD pipeline building tools (GibHub, Apache Maven, Jenkins);
  • Experience with APIs such as: REST, OpenAPI, CMIS, STOMP;
  • Ability to create Docker files, write Jenkinsfiles and Helm Charts;
  • Excellent knowledge of English (both written and verbal) is required;

Interested: Please send your resume resume@all-european-careers.com