.NET DEVELOPER | 20+ YEARS EXPERIENCE

Your team has AI tooling.
But the way you work hasn't changed.
More code, more review, not more features shipped.

I help dev teams who find that AI tooling isn't delivering real results yet, by joining the sprint and discovering together how AI actually helps. So you ship faster, without sacrificing quality.

Listen Where is your team now?

Join Adapt workflow in the sprint

Handover They can take it from there

Schedule an introduction View my approach

Available 2 days/week

"Got up to speed exceptionally fast and consistently made the right decisions" - Cees, Software Architect at multinational

"Proactive is his motto. Picks up what matters and doesn't let go until it's resolved" - Robert, IT Team Lead at financial institution

"Advised the board and shaped the software architecture direction" - Chantal, IT Operations Director

Sound familiar?

Your developers are experimenting with GitHub Copilot and Claude. But it's not making a measurable difference yet. The output stays the same, only the tooling changed.

Your backlog is growing, but velocity isn't. AI generates more code, but review pressure grows with it. It feels like the tooling changes but the way you work doesn't.

You're not looking for a course or workshop. You're looking for someone who joins your sprint and shows how it's done.

Schedule an introduction

I'm Chaïm Zonnenberg. 20+ years in .NET, 2x cum laude university degree. I build Invullen.nl entirely with Claude Code and use it daily for maintaining Factuur-Assist.nl (135+ customers). Not theory, but daily practice. I join your sprint 2 days a week and transfer that workflow.

More about me

APPROACH

How I work with your team

I help anchor AI tooling in your workflow. Not as training, but by joining your sprint and showing how it's done.

AI Adoption for .NET Teams

I join your team and make AI tooling actually work. Daily in Claude Code, also experienced with GitHub Copilot. While I ship features alongside your team, they learn the workflows and patterns that make the difference. The goal: your team works differently than before. Faster, with more confidence.

AI workflows configured for your codebase
Project instructions, prompts and conventions your team can use immediately
Pair programming with AI — I demonstrate, your team takes over
Visible results: your team works faster and with more confidence

Proof

2 own SaaS products

developed daily with Claude Code

Schedule an introduction

Also specialized in

Identity & SSO

Enterprise SSO and SCIM for .NET SaaS. OAuth2, OpenID Connect, SCIM provisioning.

AI integration in your product

AI features in your SaaS — from prototype to production. Including monitoring and responsible deployment under the AI Act.

Technologies I work with

Claude Code .NET C# Azure SQL Server OpenAI Semantic Kernel OpenID Connect

Schedule an introduction

How we work together

From experimenting to AI-first development in three steps

Introduction

A 30-minute call. I listen, ask questions about your stack and team, and give an honest assessment: where the gains are and whether I'm the right fit.

Build alongside & demonstrate

I dive into your codebase, set up Claude Code for your project and ship the first feature within a week. Your team sees AI-first development in action.

Handover

After the engagement your team works differently. Faster, with more confidence in AI tooling. Workflows, prompts and conventions are in place. I make myself redundant — that's the goal.

Experience & references

20+ years at ABN AMRO, PGGM, Van Lanschot & more · 2x cum laude university · Microsoft Certified Identity & Access

Complex migration project delivered successfully

"Chaïm managed a large and complex migration project for us and brought it to a successful conclusion. He got up to speed exceptionally fast and consistently made the right decisions based on his deep knowledge of .NET and SQL Server."

Cees

Software Architect at multinational

Proactive from day one

"Chaïm is a true professional. One you don't want to let go from day one. Proactive is his motto. He picks up what matters and doesn't let go until it's resolved."

Robert

IT Team Lead at financial institution

Advised the board on architecture

"Chaïm filled the advisory role of Software Architect at our organization. He advised the board and gave direction to the software architecture. He also guided the development team into the world of microservices and brought knowledge about Microsoft Azure."

Chantal

IT Operations Director