Jos Hendriks

Jos Hendriks

Helping teams build quality software and simplifying complexity | Lead developer | Technical coach | Software architect

's-Hertogenbosch, The Netherlands

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Jos Hendriks is a pragmatic software architect and technical lead with experience across high-tech, e-commerce, and construction technology. He works with teams to make sound architectural decisions and build maintainable software that supports real business goals.

Jos believes good architecture is created collaboratively, with developers taking ownership of both the problems they solve and the systems they build. He combines technical leadership with hands-on coding, keeping architectural decisions grounded in the realities of implementation. Alongside his project work, he enjoys mentoring developers, sharing knowledge, and improving engineering practices.

Area of Expertise

  • Information & Communications Technology

Topics

  • Software Development
  • software engineering
  • DevOps
  • continuous delivery
  • Automated Testing
  • Software Architecture
  • .NET
  • C#.Net
  • .NET Aspire
  • Cloud
  • Azure
  • CI/CD Pipelines
  • Pair Programming

Red → Green → WOW: TDD in 105 Minuten

Zin om even echt met je handen aan de code te zitten? In deze workshop duiken we samen een Coding Dojo in: een speelse, collaboratieve en volledig veilige omgeving waar we experimenteren, leren en vooral… veel plezier maken.

Geen slides, geen lange theorie, maar direct aan de slag met Test-Driven Development (TDD) en refactoring. We kiezen aan het begin samen ons avontuur:

- Gaan we vanaf scratch een challenge oplossen met TDD?
- Of storten we ons op het verbeteren van existing code?

Jij mag meebeslissen!

Een Coding Dojo draait om deliberate practice: stap voor stap beter worden door korte feedback-loops, baby steps en samenwerken. We wisselen regelmatig van rol (driver/copilot), zodat iedereen, ongeacht niveau, kan bijdragen op zijn of haar eigen tempo. Beginners zijn net zo welkom als doorgewinterde ontwikkelaars.

Wat kun je verwachten?
- Een relaxte, niet-competitieve sfeer
- Veel ruimte om vragen te stellen en dingen uit te proberen
- Live coding in korte iteraties (met humor en soms wat chaos, dat hoort erbij!)
- Een kata die je na afloop thuis zelf kunt herhalen
- Het gevoel dat je TDD nu eindelijk écht snapt

Of je nu TDD wilt leren, refactor-skills wilt aanscherpen of gewoon samen wilt coderen met andere liefhebbers—dit is jouw moment.
Kom, doe mee, laat je verrassen, en bouw samen met ons aan betere code en betere gewoontes.

Let’s code, learn, refactor, repeat.
Zien we je in de dojo?

Wat heb je nodig:
- Laptop
- Favoriete IDE
- Een taal naar keuze (maar zorg wel dat je een pair kunt vinden, dus liefst niet al te exotisch)

We don't need no stinkin' testers

A world without testers, how great would that be? Just type your C# code, build things, deliver things without someone else nagging about bugs and quality.
It would suck. But for different reasons than you would think! We need their thinking before coding starts, not afterwards.
This session explores how developers can get the most from testing, collaborate effectively with testers, and make test expertise part of the development process.
This session is fully packed with demos, tools and techniques. xUnit, approval testing, playwright, reqnroll. They demonstrate how to prevent testing being an afterthought. We still need QA people. Automated testing software engineering, these tools and techniques support that.

AI for your .NET app with Microsoft Agent Framework

AI is evolving at a rapid pace, and keeping up with concepts like agentic AI, RAG, MCP, and LLM integration can be overwhelming. You want to start, but where and how? In this session, we’ll explore how the Microsoft Agent Framework SDK can help simplify that journey and make practical AI integration more accessible.
Through clear explanations, live demos, and step-by-step code, you’ll learn how to connect an LLM to your own application and how the core concepts fit together in real-world scenarios. We’ll dive into topics like RAG and MCP and explore examples ranging from playing music to automatic story point estimation.
By the end of the talk, you will leave with the skills to implement AI in your own projects. Bonus: you might evem learn something about metal music.

45-60 minutes, targeted at developers, leads and architects. Examples and demos in C# .NET and not too serious.

Shift left on testing with .NET Aspire

Aspire is a great way to get your application up and running together with all the dependencies it needs. But what if you could use that very same setup to run your automated tests as well?

In this session, I’ll show how to set up, run, and debug integrated tests both locally and in a CI/CD pipeline. We’ll cover setting up the depencencies like database creation and API mocking along with ways to isolate your testdata and how Open Telemetry can be used.

A hands-on, practical session that will give you a solid starting point that enables you to leverage Aspire to truly shift left on testing.

Tags: .NET C# Aspire, Testing, mocking,

.NET Assemble! 2026 Sessionize Event Upcoming

October 2026 's-Hertogenbosch, The Netherlands

DevConf 2026 Sessionize Event

March 2026 Heerlen, The Netherlands

Future Tech 2026 Sessionize Event

March 2026 Utrecht, The Netherlands

.NET Zuid User group Sessionize Event

January 2026

Jos Hendriks

Helping teams build quality software and simplifying complexity | Lead developer | Technical coach | Software architect

's-Hertogenbosch, The Netherlands

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