Jan Willem De Birk

Observer
DISC Type : ci

Founder at CodeReviewr

Laren, North Holland, Netherlands

Overview

Jan Willem de Birk is the CTO at Brthrs and the Founder of CodeReviewr, with a background in Applied Science from Amsterdam University of Applied Sciences. Described by colleagues as a consummate professional, he is recognized for being up-to-date on the latest software trends and incredibly easy to work with.

He is a strong advocate for data privacy, ensuring his product CodeReviewr is fully hosted on EU servers to comply with GDPR.

Personality Overview

Value Driven

Assertive

Example Seeker

They are generally strong communicators and are not easy to convince.  They are likely to ask many questions and look heavily for supporting information. They can sound friendly and charming but can quickly change gears to become inquisitive and probing.

Topics They Care About

AI-driven Development
He actively discusses the significant shift AI coding tools are causing in software engineering and personally uses tools like Claude for coding and writing.
EU Data Sovereignty
Emphasizes the importance of data locality for regulatory compliance, highlighting that his product, CodeReviewr, is hosted in Germany to align with GDPR.
Ethical AI
He values trust in AI conversations and has praised companies like Anthropic for committing to ad-free AI models to avoid monetized or biased recommendations.

Media Appearances

Jan has no verified media appearances

Work History

11-2025
Founder at CodeReviewr
3-2025 - 11-2025
Strategic Advisor at GreenPT
1-2024
CTO at Brthrs Agency
1-2023 - 12-2023
Lead Software Engineer at KidsKonnect
1-2016 - 12-2022
CTO / Co-founder at Digital Chefs | Learning Technologies

Education

2005 - 2009
Bachelor of Applied Science - BASc from Amsterdam University of Applied Sciences

More Information

Social Presence :

Prographics :

Exp : 18 Location : Laren, North Holland, Netherlands Job Level : Leadership Designation : Founder at CodeReviewr
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Insights For Selling To Jan Willem

During A Call Or A Meeting

DO's

  • Build rapport, it will come handy to handle hard questions later
  • Help them realize that there is no personal risk in making this decision
  • Invite them for a social do but don’t rely solely on the relationship

DONT's

  • Don’t rely excessively on your relationship with them to win the deal
  • Avoid making offhand commitments
  • Don’t try to rush them into a decision, provide all necessary information first

When Cold Calling

When Writing An Email

While Negotiating & Closing

    The secret to closing fast with Jan Willem is

  • Proven value, strong testimonials are important to them, relationships will have some weightage.
  • Will you ever get a clear answer from Jan Willem

  • They are practical yet friendly, don’t expect a clear no very often.

Insights For Deal Planning

    How fast (or slow) will Jan Willem move?

  • They like to analyze well and can take their time to reach any decisions.
  • Can Jan Willem take some risk or not?

  • They evaluate their decisions systematically and are less likely to take risks.

You And Jan Willem

Personality Compatibility


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