About BIMproFIT

BIMproFIT is a deep-tech spin-off from the University of Antwerp, automating MEP (mechanical, electrical & plumbing) design for non-residential buildings, starting with HVAC ductwork.

Despite modern design software, duct design is still done manually. Space constraints, conflicting requirements, and late-stage architectural changes force engineers to repeatedly redesign layouts from scratch, a process that typically happens multiple times across both engineering consultancies and contractors before a building gets built.

We’re changing that.

BIMproFIT is a SaaS plug-in for Revit, the world’s leading BIM platform, that automatically generates clash-free, practically feasible ductwork designs directly from a building model, in minutes. Engineers can optimise for installation cost, energy use, or total life-cycle cost, delivering up to 70% time savings at every stage of the workflow. We’re a small technical team with proven technology and early customers.

The Role

You’ll join BIMproFIT as a Senior Software Engineer, working directly with the founders on a product that’s already showing concrete market traction.

This is a hands-on C# / .NET role covering Revit add-in development, cloud backend architecture, and REST API design. You will have real ownership and direct impact on how the product and company evolve.

We're looking for someone who:

• enjoys solving complex engineering challenges across geometry, optimization, and cloud,

• is comfortable working without all the answers handed to them,

• and wants to help build a company, not just write code.

If you're looking to build something from the ground up and shape its direction, this is that opportunity.

What You’ll Do

Product Development

• Lead end-to-end development of the BIMproFIT Revit add-in and cloud architecture backend

• Translate product specifications into well-structured, maintainable code

• Own the backend API layer connecting the Revit front-end to the cloud-based optimization engine

• Drive authentication, data persistence, and multi-tenant architecture decisions

Technical Leadership

• Define and enforce coding standards, architecture patterns, and review processes

• Work directly with clients to understand how they use the product and feed that back into technical decisions

• Identify and manage technical risk proactively

Infrastructure & DevOps

• Set up and maintain CI/CD pipelines, cloud hosting, and deployment workflows

• Ensure the system is reliable, scalable, and secure for commercial deployment

• Own the evolution of our APIs, introducing new versions and changes while maintaining backward compatibility for existing customers and integrations

Collaboration

• Talk to customers, understand their workflows, and translate that directly into better product decisions

• Work closely with the founding team to shape the technical roadmap

• Work with Revit engineers and domain experts on BIM-specific constraints

Our tech stack

• C# / .NET for Revit add-in development (Revit API)

• Python for the core optimisation engine

• REST API connecting the add-in to the cloud backend

• AWS

What We’re Looking For

Must-have

• 5+ years of professional software development experience with strong skills in C#/.NET

• Experience with REST API design and cloud-hosted backend services (ideally AWS)

• Proven ability to own and ship a product end-to-end

• Comfortable working in a small team with high autonomy and accountability

• Professional English speaker

Nice-to-have

• Experience with Revit add-in development (Revit API, C#)

• Familiarity with optimization algorithms or computational geometry

• Familiarity with BIM environments, Revit API, or AEC-domain software

• Knowledge of MEP engineering workflows or openBIM/IFC standards

• Experience in an early-stage startup or academic spin-off environment

What We Offer

• A technically hard problem at the intersection of computational geometry, graph optimisation, and cloud engineering, with a clear path to market

• Real ownership: your architectural decisions will shape the product for years

• Direct access to the founding team, with deep domain and research expertise in MEP engineering and BIM

• Opportunity to grow into a technical leadership position as we scale, with a say in hiring, team structure, and how we build

• Competitive salary

• Flexible hybrid working, with co-working space access in Antwerp

• Accelerator resources through imec.iStart (Antwerp)

How to Apply

Sound like you? Send us your CV and a short note on why this role excites you.

zakarya.kabbara@uantwerpen.be or sandy.jorens@uantwerpen.be