Data Integration Expert

Project overview

Job description

In general, the activities can be described as follows:

Data management/data warehousing, ETL & data management

Data integration activities including merging data from different sources

Setting up and developing data streams (from source unlocking to dashboard & applications)

Advising on the connection of data-driven processes and systems

Advising on the improvement of existing processes & information flows and systems

Background of the assignment

The Buitengewone Zaken Blauw (BZB) program works on complex, politically urgent assignments of a temporary nature, assigned by the management team of the Tax Administration. These assignments require interdepartmental coordination and fall outside the primary processes of the Tax Administration. BZB focuses on, among other things, remediation work and innovative methods, such as artificial intelligence and process automation.

The BZB program implements various programs such as the wrongly rejected requests regarding Amicable Debt Restructuring Natural Persons (MSNP), the Temporary Block Connection Allowance (TTB) subsidy scheme, and the MijnHerstel route for DGH.

Requirements

Only offer Dutch CVs and candidates must speak Dutch perfectly. The assignment is less suitable for freelancers due to the DBA law.

Experience in setting up and developing data streams (from source unlocking to dashboard & applications)

Experience in at least one of the following programming languages: Python, C# or Java

Experience in advising on the connection of data-driven processes and systems and knowledge and experience with data integration.

Knowledge of data management/data warehousing, ETL and data management

Possesses excellent command of the Dutch language

Experience in SQL

Completed Master's degree is a requirement

Experience with comparable complex program and data environments is required

(Political) administrative sensitivity is a must

Competencies

Administrative sensitivity

Creativity

Anticipation

Networking

Environmental awareness

CV and motivation guidelines:

Format: No preference

Language: Dutch

Max. number of pages: 5

Permitted deployment form:

Employee in service of supplier: Yes

ZZP: No

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 need information from you as a contracting party, including regarding the Chain and Principal Liability Act (Wet keten- en inlenersaansprakelijkheid). 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 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 an 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 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 on the accuracy, completeness, and timeliness of the remittances.

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

Project details

• Start: 2026-11-01T23:00:00
• Location: Den Haag Zuid-Holland, NL
• Languages: Dutch