Our vision: Digitization will continue massively. Hackers will become more and more capable. Automatic tooling just finds the simple vulnerabilities. We need ways to drastically empower the human capacity of the software security sector.

Our mission: to help software companies produce secure* software products, by enhancing the symbiotic relation between security expert and machine

* No one is ever completely secure

The team

Kevin Valk

Kevin Valk

Founder & CTO

My story

Since the age of ten I had a passion for computers. At the age of thirteen I got into reversing and exploiting online games. This enabled me to learn the ins and outs of hacking software, and computer systems in general.

During my bachelor and masters computer science at the Radboud University, I analyzed a game from Activision-Blizzard. I identified numerous security vulnerabilities and reached out to them if I could help. This landed me a year in silicon valley improving the security of the software and hardware of the game. I decided to come back to the Netherlands and worked for one year at Northwave doing business cyber security. After, I worked three years at Riscure, which is an industry leader in side channel analysis and fault injection. Here, I analyzed (hacked) to my heart's content solutions ranging from mobile banking apps, credit card platforms to elevators.

Using everything I learned over the past two decades, I want to help the world have more secure software and hardware. With the tools and services Codean provides, we are making that into a reality.

My story

My career started in 2007 when I co-founded Greetinq BV, where I experienced both ups and downs of startup life. After winning a national TV-show in 2009 the media celebrated me as a successful entrepreneur, but four months later I was almost bankrupt and had to reorganize the company. A tough phase in my life, but fruitful regarding lessons learned.

After selling the company in 2012 I wrote a book on my learnings (Startups & Downs, 2014) and shared the lessons in coaching and talks. In the past 10 years I've guided hundreds of entrepreneurs and entrepreneurs. As trainer and coach for startups, teaching at universities, and managing incubation programs. I also shared my startup lessons in the corporate world as innovation consultant at EY VODW and the Rabobank.

However, I love to be back as entrepreneur myself. To put all the lessons I learned from coaching entrepreneurs in action myself.

Arthur Tolsma

Arthur Tolsma

Cofounder & CEO

Open positions

Open position 1: software security analyst

You will be the first of an in-house elite team of analysts to use the Security Review Environment. So we are looking for people who are open for innovation, who would like to be on the forefront of new technologies, and are keen in optimizing them. The security project you will analyze range from Java web servers (hopefully in Kotlin) to state of the art Zero Knowledge Proof protocols build on a blockchain.

Do you want to know more? Read the job details here.

Open position 2: software engineer

We are looking for the first software engineer of many. In one year we will have a team of 4 with mixed skills, from back-end, front-end, UX/UI, to data science. In 3 years we will probably be with 10-20 engineers. So we are looking for people who are up for an exciting and changing job. And who want to join our adventure in building a new Security Review Environment to superpower all the ethical hackers out there.

Do you want to know more? Read the job details here.

Internships: various open positions

Since we are building a world leading product and company, we are always open for bright students who want to challenge themselves and learn from ambitious high-tech entrepreneurs. We mostly work with students who are doing an internship or research project for their BSc/MSc studies in computer science (for technical internships) or in marketing/entrepreneurship/innovation (for business internships).

Do you want to know more? Send an email with short interest in Codean and your study background to