Michel van den Berg

Lead full stack developer specialized in Microservices

About me

my story

My name is Michel van den Berg and I'm an independent lead full stack developer - preferably .NET and React/Typescript - specialized in building microservices, modular monoliths and everything that comes with it.

You can also call me a software/solution architect, although coding comes first and I don't believe in not coding in such a role. I have followed training by various industry gurus like Udi Dahan and Greg Young.

I work under the company name 'Promontis', which is a contraction of the Latin words 'pro' (for) and 'montis' (of the mountain; my last name). In my spare time, I contribute to open source projects and work on a startup named Stylister.

For fun I watch TV series (anything Marvel) and play the piano.

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Work Experience

Software Architect/Lead Developer

February 2022 - Present

Helping the Enterprise Tax Platform (ETP) - which provides data-driven tax insights for the tax professional - to implement a Modular Monolith.

Technologies used: .NET, C#, Modular Monolith, MassTransit, Microsoft SQL Server, Oracle 19c, Azure, AWS, Vue 3, TailwindCSS, Typescript


August 2021 - Present

Piral allows you to build web apps in React that follow the microfrontends architecture.

Lead developer

February 2021 - Februari 2022

Brisker Group is a full-service HR service provider. Brisker Group is the umbrella name for the brands Pay for People, Holland Employment Experts, Smart Services, Tentoo and Nextpayroll.

Introducing Briskergroup to high-cohesive and low coupling practises. Gradually transforming the codebase to a more (stable) service oriented solution, both in the backend and in the frontend.

Technologies used: .NET, C#, Microservices, MassTransit, Azure, React, TailwindCSS, Typescript

Software Architect

February 2020 - February 2021

Collenda is the market leader in software solutions for the entire credit life cycle.

Trained non-.NET developers to be proficient in .NET so that Collenda could stop with outsourcing and have less risk. Giving guidance on how to move forward from a legacy codebase to a modern way of working.

Technologies used: .NET, C#, WPF, Jenkins, Jira, Confluence


2020 - Present

HotChocolate is the leading GraphQL Server for .NET core and .NET classic.

It currently has over 1.4K stars on GitHub.


2019 - Present

StreamsDB is the modern stream database for advanced stream processing and event sourcing systems

It provides a rock solid foundation for event-sourced applications that store their state as a series of events, while allowing you write to multiple streams within a single transaction secure and efficient.


2019 - Present

EventFlow is an async/await first CQRS + ES and DDD framework for .NET

It currently has over 1.3K stars on GitHub.

Lead Developer

January 2019 - February 2020

Introducing ENAI and Trigion, one of the leading security system suppliers, to a high performance streaming big data pipeline using Apache Kafka.

Technologies used: .NET Core, C#, Docker, Kubernetes (on-premise), Apache Kafka, RocksDB, Apache NiFi, Lenses, Git and GitLab

Lead Developer & Software Architect

June 2018 - April 2019

Helping Cito to support governments, institutions and awarding bodies so that they can develop world-class testing and monitoring systems to complete their educational programmes. From a legacy Windows-only monolith to stable future-proof microservices on multi-browser and multi-device, while simultaneously transforming the IT department.

Technologies used: .NET Core, C#, Docker, Kubernetes, NServiceBus, Microservices, DDD, Javascript, Azure DevOps, Git, OpenID Connect, Angular, CI/CD, DevOps, Azure, Scrum and more

Software Architect

AFAS Software
May 2017 - June 2018

Creating the next generation of AFAS ERP platform based on their vision to generate software based on a model that represents the client's world instead of programming it.

Technologies used: .NET Core, C#, Azure Service Fabric, CQRS, Event Sourcing, Microservices, DDD, React, TDD, Selenium, TFS, Git, OpenID Connect, Powershell, Cake, CI/CD, DevOps, Azure, Scrum and more


July 2017 - Present

Founder of a small startup that will be able to style interiors in less than a 10th of the time it currently takes by making use of advanced optimization algoritms and artifical intelligence.

Technologies used: .NET Core, C#, Java, Kubernetes (AKS), Docker, EventFlow, (Get)EventStore, StreamsDB.io, Microservices, DDD, Javascript, TDD, React, GraphQL, Git, OpenID Connect, CI/CD, Azure, Optimization algoritms, AI, and more

Microsoft Azure Advisor

2014 - Present
Microsoft Azure Advisors help advice Microsoft in the use and vision of the Azure platform. Subjects that are discussed are Service Fabric, Resource Manager, API Management, Azure Active Directory (B2C), Service Bus, App Service and Monitoring.

Senior Software Developer

Nov 2016 - Apr 2017

Rewriting the backend of the new Eneco app. Eneco is one of the largest producers and suppliers of natural gas, electricity and heat in the Netherlands, serving more than 2 million business and residential customers.

Technologies used: .NET, C#, ASP.NET Web Api, Apigee, Azure, Jira, Confluence, SOLID, TDD, Git, CI/CD, Azure, Oracle 19c and more

Cloud Solution Architect

Coöperatie VGZ
Apr 2016 - Apr 2017

Setting up the cloud landscape for VGZ - the second largest health insurance provider in the Netherlands. You can see the platform at vgzapi.nl. The API platform is connected to various legacy services in- and outside the organization, is connected to DigiD and also enables their mobile app.

Technologies used: .NET, C#, ASP.NET Web Api, ASP.NET MVC, WCF, Azure, Azure Storage, Azure Service Bus, Azure API Management, Azure Active Directory (B2C), Azure App Service, DigiD, VSTS, SOLID, TDD, Git, CI/CD, DevOps, Scrum and more

Senior Software Developer

Nov 2015 - Apr 2016

Developing a mobile app - including the backend - that Nike uses to plan the SKUs of around 600 European stores.

Technologies used: .NET, C#, Xamarin, MvvmCross, ASP.NET Web Api, ASP.NET MVC, Javascript, Azure, OAuth, Jira, Confluence, SOLID, TDD, Git, CI/CD, DevOps, Scrum and more

Full Stack Developer

Jul 2015 - Dec 2015

Helping a subdivision of the Fortune 500 company Maersk to conquer the onshore logistics market.

Technologies used: .NET, C#, ASP.NET Web Api, Javascript, Azure, NServiceBus, OpenId, IdentityServer, Jira, Confluence, SOLID, TDD, Git, CI/CD, XLDeploy, DevOps, Scrum and more

Software Developer

Jun 2011 - Jul 2015

Delivering multiple software development projects to aid in various aspects of daily business.

For example, a reporting solution for the FTK (Financieel Toetsing Kader). The FTK is mandatory as of by the central bank of the Netherlands (DNB) and is considered complex. The results of the solution are yearly audited by EY.

Technologies used: .NET, C#, VB.NET, WinForms, WPF, Mvvm, ReactiveUI, DevExpress, TFS, SOLID, TDD, Scrum and more

Senior Software Developer

Aug 2010 - Jan 2013
Helping companies to succeed with software development within the Microsoft area.

Microsoft Competence Leader

May 2011 - Jul 2012
Helping around 40 colleagues in the Microsoft Competence Centre to excel.

Software Developer

UMC St Radboud
Oct 2010 - Jun 2011

Developing an electronic health record system for UMC St Radboud - a university medical center.

Technologies used: .NET, C#, ASP.NET, Javascript, TFS, SOLID, TDD, CI/CD, Scrum and more

Microsoft Student Partner (MSP)

2008 - 2009

The Microsoft Student Partners is a worldwide recognizable program to sponsor students majoring in disciplines related to technology. The MSP program enhances students' employability by offering training in skills not usually taught in academia, including knowledge of Microsoft technologies.

Microsoft chooses one skilled student from each institution at a time to serve as representatives. MSPs are assumed to further share the knowledge among the academic community by arranging courses; giving presentations and lectures; and initiating projects among the students.


The Microsoft Student Partners is a worldwide recognizable program
to sponsor students majoring in disciplines related to technology.

My education

Particular Software

Udi Dahan's Advanced Distributed Systems Design

Designing large-scale distributed systems is hard. While new technologies make it easier to comply with today's communications and security standards, they don't auto-magically give you a robust and scalable system. See how companies like Amazon and eBay run their systems and learn how to:

  • Avoid common pitfalls in distributed systems
  • Use loosely coupled messaging communication
  • Identify and allocate business logic to services
  • Decompose services into layers, tiers, assemblies, and processes
  • Design for service management and monitoring in production environments


Greg Young's Advanced CQRS & DDD Workshop

This advanced CQRS training dives deeper into discussion on process managers, sagas, and advanced messaging patterns

Gregory Young (author of EventStore) coined the term “CQRS” (Command Query Responsibility Segregation) and it was instantly picked up by the community who have elaborated upon it ever since.


Akka.NET Design Patterns
Akka.NET actors expose tons of new possibilities for designing reactive systems that are resilient, responsive, elastic, and message-driven - but taking advantage of these capabilities is done best in combination with established design patterns.

Delft University of Technology

Computer Science (not finished)
2006 - 2011
Ranked among the top universities of technology in Europe (#18, QS 2010) TU Delft’s excellent research and education standards are backed by outstanding facilities, research institutes and research schools.


NLP Practitioner, Psychology psychotherapy Commucation
2009 - 2010
NLP stands for Neuro-Linguistic Programming. Neuro refers to your neurology; Linguistic refers to language; programming refers to how that neural language functions. In other words, learning NLP is like learning the language of your own mind!

my services

Architecture and Development

Architectural Review

Microservices DDD Event sourcing CQRS Composite UI BPMN/UML

We start with a review of your proposed architecture (which usually goes on two days) at which point, with the feedback you'll receive, we schedule a full week architecture & design workshop where we refactor the solution.

The product of that first week usually includes the identification of top-level business services, their break-down into business components, the use of existing systems and their orchestration within each business service, and the message choreography between them. We usually have about 15 to 20 UML/BPMN diagrams per service at this level.

At that point we usually follow up with twice-weekly conference calls (about an hour each) to make sure that the design effort doesn’t get stuck or take a wrong turn. 2-3 months after that, we usually have another 2 day review. After that, usually we move to a mode of an hour call once or twice a month.

Azure Training

AKS ARM Service Bus CosmosDB And more
I help organizations transition to the Azure cloud.

Full Time Development

C# / JAVA / JS Backend Mobile Web Desktop
I'll work with you on-site for 40 hours a week.
Application Lifecycle Management (ALM)


Scrum Agile CI/CD Azure DevOps
I'll work with your team to streamline their processes.
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