Senior Java Developer

Project overview

We are looking for an experienced Java Developer to expand team GTMx. Together with colleagues, you will work on the entire development process, from refinement and impact analysis to developing, testing, deploying, and demonstrating new functionalities.

As a Java Developer, you will work on developing, maintaining, and improving applications, services, and APIs within a modern container platform environment.

In addition to development work, you will actively contribute to the management and continuity of services according to the DevOps methodology.

You will think about technical improvements, automate processes where possible, and help resolve incidents and management issues.

You are used to taking responsibility for the quality of your work and are capable of independently analyzing and solving complex technical issues.

Furthermore, you will collaborate closely with developers, testers, and administrators and actively share your knowledge within the team.

You are broadly deployable and possess knowledge of Java development, container platforms, and modern deployment processes.

We expect you to be familiar with Java, OpenShift, Kubernetes, SQL, PostgreSQL and/or DB2, REST and SOAP services, CI/CD principles, and working within Agile/Scrum and DevOps environments.

Knowledge of Tekton Pipelines, OIDC (OpenID Connect), cryptography, security principles, Angular, and Renovate is a plus.

We work within SAFe according to an Agile methodology, within a scrum team, with User Stories, Epics, and Features.

We are looking for someone who functions well within a scrum team and actively contributes to the Agile and DevOps methodology.

We also expect the following from you as a medior developer:

taking ownership and responsibility for applications and services;

contributing to the manageability, stability, and security of the solutions;

proposing and realizing improvement initiatives;

supporting colleagues with technical issues;

actively sharing knowledge within the team;

analyzing and resolving production and management issues;

thinking about future developments in the field of software development, platforms, deployments, and DevOps.

In all of this, you will pay attention to security, quality, and continuity aspects.

Background of the assignment

You will work at the Interaction Online department, part of the IV Generieke Voorzieningen directorate of the Tax and Customs Administration.

The Interaction Online department develops and manages the information systems that enable digital interaction between the Tax and Customs Administration and citizens, businesses, and intermediaries.

The department works according to the SAFe methodology and consists of over 30 scrum teams, divided across five Agile Release Trains (ARTs).

These teams are responsible for developing, managing, and further developing the online services of the Tax and Customs Administration.

This includes digital forms, portals, and generic facilities for access and identity management.

This assignment is within the Complicates Subsystems (CSS) ART, in the Generiek ToegangsManagement (GTMx) team.

This team works in two scrum teams on generic access management solutions, playing an important role within the digital services of the Tax and Customs Administration.

The team works hybrid. Tuesday is the fixed office day when the team gathers at the work location in Apeldoorn.

Furthermore, a two-day PI event takes place every quarter, for which your presence is expected.

Requirements

Only offer Dutch CVs and candidates must be able to speak Dutch perfectly.

Assignment is less suitable for ZZP'ers due to Wet DBA OCA and OCP or demonstrable experience Java/Jakarta Kubernetes / Openshift

Experience with CI/CS and DevOps Principles

HBO work and thinking level

Experience with (Enterprise) Java (Java / Jakarta EE and/or Quarkus) (5 years)

Experience with Openshift or otherwise Kubernetes (3 years)

Wishes

Java

OpenShift

Kubernetes

SQL

PostgreSQL/DB2

REST- and SOAP-services

CI/CD deployments

Agile/Scrum

SAFe

DevOps

Knowledge of OIDC security principles

Tekton Pipelines

Renovate

Angular is a plus.

Competencies

Analytical ability

Collaborative

Ownership

Change and improvement oriented

Quality oriented

CV and motivation guidelines:

Additional Information

When you, as a supplier, offer a professional to us and they are placed, we will need information from you as a contracting party, including regarding the Wet keten- en inlenersaansprakelijkheid (Chain Liability Act).

The ‘WKA’ aims to prevent abuse in the remittance of payroll taxes at all links in the chain; from supplier to client.

We cover these risks for our clients through a blocked account, the G-rekening.

This is an account to which a portion of the invoice amount is deposited and from which you can pay payroll taxes and VAT to the Tax Administration.

The percentage to be deposited depends on whether you have a SNA certification (NEN-4400-1 or NEN-4400-2) or not, and whether your company is located in the Netherlands or abroad.

You can apply for the G-rekening from the Tax Administration.

If you cannot obtain a G-rekening (and you can provide proof from the Tax Administration for this), you also have the option to provide an accountants' report (assurance report regarding personnel lending) every quarter.

In this, a certified accountant (AA or RA) will issue a statement about the accuracy, completeness, and timeliness of the remittances.

Please note that the costs for this report are for your own account.

• Format: No preference
• Language: Dutch
• Max. number of pages: 5

Project details

• Start: 2026-11-10T23:00:00
• Location: Apeldoorn Gelderland, NL
• Languages: Dutch