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Developer -PowSyBi Developer

OverheidZZP · Arnhem

Arnhem · RemoteFull-TimePosted Jun 27, 2026

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Job description

Over de functie

In het kort: Je gaat als PowSyBl developer Java-software ontwikkelen en aanpassen voor netdata-uitwisseling, UCTE-export uitbreiden, code testen en documenteren, en samenwerken met operations en de open-sourcecommunity voor een stabiel en duurzaam energienet.

PowSyBi Developer | Power System Software Engineer

How do you keep the Netherlands powered?

As a Power System Software Engineer, you will contribute to the enhancement of grid data exchange capabilities by extending and adapting the PowSyBl framework. Your work will ensure alignment with TenneT’s operational grid model and European data exchange standards.

You will collaborate remotely with the Operations team and the PowSyBl open-source community to design, develop, and deliver enhancements directly to the public PowSyBl repository. The team consistes of 6 people, who work fully remote. For this assignment you will need to bring your own device.

This assignment has an initial duration of approximately six months. A temporary extension may be considered if additional PowSyBl-related enhancement requirements arise.

Tasks

  • Extend and adapt PowSyBl’s UCTE export capabilities
  • Ensure alignment with operational grid models and European data exchange requirements
  • Develop, test, and deliver enhancements to the public PowSyBl repository
  • Collaborate with internal Operations teams and the PowSyBl open-source community
  • Ensure high-quality, maintainable, and well-documented code delivery
  • Support validation and integration of delivered functionalities

Additional Information

  • This assignment is suitable for self-employed professionals (ZZP) or candidates operating as Director-Major Shareholder (DGA) through their own company
  • Suppliers must be fully aware of and compliant with applicable labor laws, employment conditions, and the TenneT Collective Labor Agreement (CAO).
  • This position is classified under Grade 8 of the TenneT CAO.
  • Please submit the candidate’s CV and personal motivation in English.

Screening

  • Pre-employment screening is mandatory. Once the candidate is selected, the required screening documentation will be provided.
  • The candidate may only start after successful completion of the screening process.
  • The candidate must possess a valid identification document (passport or ID card), which must be valid at both the intake and contract start date and available for verification.

Availability

The candidate must be available for the full duration of the requested assignment period.

Important

Please ensure that all candidate information is complete and accurate. Incomplete or incorrect submissions may result in the candidate not being considered or being rejected.

Together, we ensure a stable and sustainable energy grid. Keeping the Netherlands powered – together with you.

Eisen

  • Dienstverband: ZZP (of detachering)
  • Strong experience with the PowSyBl codebase (Must have)
  • Proven expertise in UCTE data models and export formats (Must have)
  • Solid Java development skills
  • Ability to quickly onboard and contribute in an existing codebase
  • Strong problem-solving skills and a proactive mindset
  • Fluent in English (must)
  • The candidate must possess a valid identification document (passport or ID card), which must be valid at both the intake and contract start date and available for verification.
  • The candidate must be available for the full duration of the requested assignment period.
  • Please submit the candidate’s CV and personal motivation in English.

Wensen

  • Experience working in distributed teams and open-source environments is a plus
  • Speaking Dutch and /or French is a big plus.

Overige informatie

Optie tot verlenging: Nee

Gespreksdatum: Onbekend

Dienstverband: ZZP (of detachering)

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