This term seems to refer to the architect/role responsible for analysing and developing/elaborating the technical design (rather than the overall design). See the first reference below.

Not sure if technical architect is the right term in English but it's the best option I could find.

BIM Engineer – Uitwerkend Architect m/v
Wat houdt de functie in?
Je beheerst een goede uitdrukkingsvaardigheid in zowel ontwerp als techniek. Je communiceert gemakkelijk en bent vindingrijk in het zoeken naar oplossingen. Je bent enthousiast over projecten in onderwijs, zorg en woningbouw. Als intermediair tussen ontwerp en engineering ben je creatief op het raakvlak van ontwerp, techniek en maakbaarheid.
(...)
Het analyseren en uitwerken van een technisch ontwerp pak je met veel plezier op.
http://www.kow.nl/?page_id=7347

Here are some of the architect specializations currently in the marketplace:

1. Technical Architect
Generally larger firms will separate technical and design architects. Most architects often lean towards one or the other as their career evolves. The simple answer for the difference between technical and design architects is the phases is which they do most of their work.

A Design Architect will typically start the project and work from the Schematic Design Phase through Design Development. At that point a Technical Architect will take it through Construction Documents and Construction Administration.

A Technical Architect will often draw how the building is put together, rather than define the overall look of the project. For example resolving the drainage detail on a flat roof and detailing the drawings for it would be a technical task.
https://www.thearchitectsguide.com/blog/10-potential-career-...