Senior Software Engineer

Senior Software Developer C# (32–40 hours)

Will you help lay the foundation for a future-proof platform that truly supports mental healthcare professionals?

At HCI, we are building a new, complex Electronic Health Record (EHR) system for mental healthcare (GGZ). This is not a greenfield side project, but software that will soon be used daily by thousands of healthcare professionals. The current system remains operational, so you’ll be building the new platform while the business continues as usual. Our ambition: go live within 2–3 years. Some say it can’t be done. We believe it can.

What will you do

At HCI CRS, you develop software that makes a real impact in mental healthcare every day. You ensure that practitioners can rely on systems that are stable, secure, and user-friendly. As a Senior Software Developer, you contribute to building a new EHR SaaS platform and help create solutions that support thousands of healthcare professionals.

You balance long-term technical improvements (architecture, integrations, performance) with short-term functional needs, while safeguarding the reliability required in a mental healthcare environment.

In this role, you combine hands-on development with strategic thinking around technical innovation and the professionalization of our development practices. You act as a sparring partner for fellow developers and product management, contributing to the evolution of our (agile) engineering practices.

In short:

• You help build a new platform (C#/.NET, Azure, microservices) to replace the current EHR
• You mainly write new code (±90%), this is not a bug-fixing factory
• You work on integrations (APIs) with other healthcare systems — stable and secure, because it simply has to work
• You contribute to architectural decisions that will still make sense five years from now
• You translate feedback from mental healthcare professionals into concrete product improvements
• You help your colleagues grow (code reviews, sparring, knowledge sharing, growth mindset)

Finally

You’re not here to just tick off tickets. You’re here to build something that needs to be right — technically and functionally. And yes, sometimes that means solving complex puzzles while everything keeps running. If that energizes you, we should talk.

Where will you work

HCI CRS is one of four business units within Health Cloud Initiative (HCI) — a network of 200+ colleagues with a strong focus on healthcare. Together, we build software that allows mental healthcare professionals to focus on care instead of IT.

Our development team consists of 9 developers (NL & ENG), a Product Owner, and a software tester, divided across two teams:

• the core team (maintaining the current application)
• the platform team (building the new scalable SaaS product — your team)

Our Head of Development, Femi, fosters a culture driven by learning and innovation. No ego — just strong technical discussions and plenty of shared laughs.

We collaborate closely through planning sessions, refinement, and code reviews, while executing individual tasks independently. Decision-making is low-hierarchy: the Tech Lead and senior developers guide technical choices, the Product Owner sets priorities, and we work closely with Product, Support, and Consultancy.

Tech stack

C#, SQL, Azure services, Blazor, AI/LLMs

Architecture/design principles: microservices, mediator pattern, event-driven design

What we offer

• Salary: €4,000 – €6,500 gross per month (based on 40 hours)
• 8% holiday allowance, internet allowance, and solid pension plan
• Hybrid working: from our office in Wageningen and 2 days from home
• 25 vacation days + option to purchase 10 additional days
• Travel reimbursement, €2.35/day home working allowance, and €500 home office budget every two years
• Learning & development: strong focus on both professional and personal growth
• Growth opportunities toward Tech Lead, Architect, or specialist roles
• A collaborative team with a genuine interest in healthcare and technology
• A close-knit, people-oriented team with humor and strong team spirit
• Daily fresh fruit, shared lunches, and team outings
• Work at a market leader in healthcare IT: 5,000+ practices, 4+ million end users — impact at scale

What you bring

You have a strong interest in applying AI in software solutions.

You’re comfortable saying “this can be improved” — and then actually improving it. You work well independently but are energized by inspiring others. You actively collaborate and communicate clearly with developers, product, and other teams. You balance stability and innovation and contribute to improving both the technology and the way of working. You actively foster a growth mindset by asking questions, challenging colleagues, sharing knowledge, and helping the team continuously improve.

• 5+ years of experience building scalable, complex software
• Experience with C# / .NET (8.0+), SQL (relational data modeling), ASP.NET (Core/Web API)
• Experience developing and maintaining API integrations in complex IT environments (e.g., healthcare systems, EHR/ECD)
• Experience with CI/CD (e.g., Azure DevOps, Git pipelines), Git, Agile/SDLC
• Strong understanding of security, stability, and performance in enterprise applications

Nice-to-have:

• Knowledge of healthcare standards such as HL7 or FHIR, Azure cloud services
• Experience with containerization, event-driven architecture, Domain-Driven Design, or modernizing legacy systems

Interested?

Does this sound like your next step? Apply via the blue button at LinkedIn

Questions? Call our recruiter Babs Bloemsaat at +31 6 47894370 or vacatures@hci-software.com

Process

Step 1 — Introduction (30 minutes)

Step 2 — Technical interview

Step 3 — Softskill interview

Step 4 — Offer

We welcome applications from everyone. Even if you don’t meet every requirement: your motivation, curiosity, and drive to build together matter just as much.

Acquisition in response to this vacancy is not appreciated.