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Jannink IT

Selected engagements, from SDKs to XR.

Client work is often confidential, so these cases describe the problem, my role and the architecture, without sharing anything that isn't mine to share.
Energy and mining

BaselineZ · Craytive Technologies2018 – present

BaselineZ, a 3D geoscience and VR platform

Principal technical owner of a cloud-native and on-premises 3D geoscience platform that delivers subsurface models to desktop, web, immersive rooms and XR headsets.

  • C#
  • ASP.NET
  • Blazor
  • WPF
Energy

Quantico Energy SolutionsMay – Nov 2026

Modernising an ML-driven subsurface platform

Principal engineer on QEarth and QLog, the seismic, well-log and real-time drilling workflows that energy operators run on Quantico's machine-learning platform.

  • Python
  • FastAPI
  • React
  • TypeScript
Medical devices

Nucletron and Elekta2002 – 2007 · 2013 – 2014

Brachytherapy planning software and DICOM connectivity

Medical-device software for oncology departments, from a shared patient-administration and DICOM library to the modernisation of the brachytherapy treatment-planning application.

  • C#
  • .NET
  • C++
  • MFC
Defence · GIS

C2SC, Royal Dutch ArmyJun 2009 – Jan 2013

GIS for the Royal Dutch Army's staff information system

Geographic display of the field situation (maps, positions, troop coordinates) for the next generation of ISIS, the Royal Dutch Army's Integrated Staff Information System for officers at base sites.

  • C#
  • .NET 3.5
  • WPF
  • GIS

More engagements

Have a platform that needs to last? Let’s talk about it.

I reply within one working day. The first call is a free, no‑obligation 30 minutes.

Start a conversation info@jannink-it.eu

Niek Jannink

Part-time, 2⁠–⁠3 days a week

Remote, or on-site in the Twente region