Interim HubSpot Integration Architect (Hands-on)

Help shape the future of our customer and data architecture.

At Mijndomein, we're building the next generation of our digital commerce and customer platforms. As we transition to Nucleus, our new central platform for commerce, customer journeys and subscription management, we're looking for an experienced Interim HubSpot & Data Integration Architect to help us get the architecture right.

And this isn't just another migration.

We're taking the opportunity to rethink how HubSpot connects with our wider technology landscape, simplify existing integrations and create a scalable, maintainable data architecture.

That's where you come in.

You'll take ownership of the HubSpot integration workstream, connecting the dots between HubSpot, Nucleus and our developing BI/data platform.

From assessing existing integrations to designing and implementing new solutions, you'll work closely with our Product, Development and BI teams to turn architectural decisions into working solutions.

This is a hands-on architecture role. You'll have the freedom to challenge existing approaches, influence technical decisions and help build something that lasts beyond the migration.

What you'll be working on

You'll play a key role in shaping and delivering our future integration architecture.

Your responsibilities include:

Explore & assess: Review our existing HubSpot environment, integrations and data flows to identify dependencies, inefficiencies and opportunities for improvement.

Design & simplify: Define a scalable integration architecture connecting HubSpot, Nucleus and our BI/data platform, avoiding unnecessary duplication.

Create clarity: Establish data ownership, source-of-truth principles, mappings and synchronisation rules.

Build & implement: Translate architectural decisions into practical solutions, configuring HubSpot and developing or supporting integrations where needed.

Collaborate: Work directly with developers, BI engineers, product owners and business stakeholders to align technical solutions with business needs.

Deliver & validate: Support testing, migration and production readiness, ensuring reliable data exchange between systems.

Share knowledge: Document the architecture and ensure a smooth handover to our internal teams.

Our production go-live is planned for mid-December 2026, so you'll be joining at an exciting and important moment.

By the end of the assignment, we aim to have a validated integration architecture, production-ready integrations and clear documentation that our teams can build upon.

Why this project?

Because you'll have the opportunity to make a real difference.

Rather than maintaining an existing setup, you'll help shape how HubSpot fits into an evolving technology landscape.

You'll work with teams who are actively building the new platform, contribute to meaningful architectural decisions and see your work move into production.

We value people who take ownership, challenge assumptions and turn complex problems into practical solutions.

If you enjoy combining strategic thinking with hands-on delivery, this project offers plenty of opportunities to do both.