About the name

Back in 2007, I was very interested in running. I had finished my assistant running coach course, I was preparing for the running coach one, and reading a lot of books on running mechanics and physiology. One of those books was “Running: Biomechanics and Exercise Physiology in Practice” (2005) by Frans Bosch and Ronald Klomp. In this book, they made a case for reactive running. Reactivity refers to the amount of energy that is reused for the purpose of performing useful work, in this case, running.  I also found it symbolic of what I was doing, reusing the energy I spent working for various consultancy agencies for the start of my freelance career. Hence the name REactivity.

 

Timeline REactivity

Pre 2007: Software consultant

Working for various consultancy companies.

2007: Foundation

I felt I could deliver more value without working for a consultancy company.

2007-2009: Project Management

Focus on projectmanagement for large IT projects

2009-2016: Software engineering

Back to software engineering on business critical systems

2016-2018: Mobile Development

iOS app development as I liked the technology

2018-now: Data & AI

Fascinating and fast moving technology

Pre 2007: Software consultant

I started my career as a COBOL programmer for Ordina Finance. This was 1996, a couple of years before Y2K, so programmers were in high demand. I learned a lot in those early years working on large and business-critical software systems. With no access to stack overflow and no copilots, most of what you learned came from experienced programmers you worked with. This was also the time of waterfall development with its flow of Information Analysis – Functional design  – Technical design – programming – (manual) testing – implementation. Contrary to the current idea that waterfall projects all failed, most of them were successful as most of the project managers had started as programmers and knew how to make their projects a success. Most companies still had a strict division between IT and business and within IT between development, support, and operations.

They were also the heydays of large-scale mainframe development, even the mainframe-oriented businesses started moving to client-server applications (where servers would often still be the mainframe) and web development.

 

 

 

2007: Foundation

Working for consultancy companies has its pros and cons. A definite pro is having colleagues with different expertise whom you can contact if you run into something you can’t solve yourself. But by 2007, I was struggling with the biggest con: the tension between consultant, consultancy company, and customer. Consultancy is based on trust, you’re helping your customers with whatever problems they are struggling with, and they turn to you for advice.  The key is that that they  should be able to trust you

2007-2009: Project Management

My first year as a freelancer I spent as a project manager.

2009-2016: Software engineering

In the first half of 2009, most companies especially in the financial and insurance sector were still jumpy about the banking crisis.

2016-2018: Mobile Development

In the previous years, I already looked at mobile development as I liked the versatility of app development.  Objective-C, however, was not my thing, but then Apple introduced Swift, which was. and still is, a very nice language to work with. After years of working on large-scale software engineering projects, I was up for something new, and app development seemed perfect.

2018-now: Data & AI

During my app development jobs I had already looked at machine-learning applications.