Backstage Engineers (Medior, Senior)

Project overview

Assignment Description

The Backstage Team is responsible for the further development and management of Backstage, the central Developer Portal of the Tax Administration. You will build upon what already exists and develop it further together. You will set up plugins, templates, integrations, and standards that help development teams deliver software faster and better. Additionally, you will play an active role in increasing the use of Backstage within the organization. You will give demos and presentations, create documentation, and support development teams in adoption.

You will work closely with other IT domains, such as CI/CD teams, security, operations, and development teams, to ensure Backstage aligns well with the total development chain.

The Backstage team works from Apeldoorn (Quintax) on Wednesdays and Thursdays and from home on other days.

Background of the assignment

For the development, management, and promotion of our Developer Portal built with Backstage, we are looking for a Backstage Team, consisting of 2 Backstage Engineers, Medior, Senior.

The Backstage Team works within Generieke Ondersteunende Services (GOS), part of the IV-component Generieke Voorzieningen. GOS supports IV chains and IV service components with generic services that support the entire software cycle: from design and realization to testing, deployment, and management. We do this through reusable solutions, standardization, and extensive automation, as much as possible via self-service.

Requirements

Only Dutch-language CVs will be offered, and candidates must be able to speak Dutch perfectly.

Wishes

The above requirements apply to both Backstage Engineers (Medior & Senior).

CV and motivation guidelines:

Permitted employment form:

The initial hiring period is until December 2026, with an option for extension.

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 Chain Liability Act (Wet keten- en inlenersaansprakelijkheid). The purpose of the 'WKA' is 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 by means of a blocked account, the G-account. 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) and whether your company is established in the Netherlands or abroad. You can apply for the G-account from the Tax Administration. If you cannot obtain a G-account (and you can provide proof of this from the Tax Administration), you also have the option to provide an accountant's statement (assurance report regarding personnel lending) every quarter. In this, a certified accountant (AA or RA) will issue a statement about the correctness, completeness, and timeliness of the remittances.

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

• You have a higher professional education (HBO) working and thinking level.
• You have knowledge and experience with Backstage.
• You have knowledge and experience with CI/CD pipelines and development tools.
• You have knowledge and experience with (Java) development on container platforms such as OpenShift.
• Format: No preference
• Language: Dutch
• Max. number of pages: 5
• Employee in service of supplier: Yes
• ZZP (Freelancer): No

Project details

• Start: 2026-10-24T22:00:00
• Location: Apeldoorn Gelderland, NL
• Languages: Dutch