Portrait of Julien Demare

Solutions Consultant at Feedzai

Julien Demare

15+ years helping merchants and banks fight payment fraud, from analyst desks to solution design. Based in Amsterdam, building this site in public for the love of the small web.

15+
Years fighting payment fraud
300+
Clients consulted
30+
Years building with tech
551 km
Run in the last 365 days · 79 runs

About Me

Born in Normandy, France, I built my first websites as a kid and contributed to open-source projects, sparking a lifelong interest in tech. At 22, I moved to the Netherlands and began a career in e-commerce and payments.

I love self-improvement, both personally and professionally. My expertise lies in payment solutions, fraud detection, and building seamless integrations between complex systems.

This site is my sandbox. There was a time when every curious web user had their own page, before platforms took over. That spirit is still alive today, often called the Small Web. This site is my contribution to it. If it inspires even one person to build their own, the web gets a little better.

Expertise

  • Fraud Detection
  • Payment Systems
  • Risk Analysis
  • API Integration

Tech toolbox

  • HTML, CSS, JavaScript
  • JSON / REST APIs
  • Linux (25+ years)
  • AWS, Azure, Google Cloud
  • WordPress, Shopify, Headless CMS
  • Next.js & React (learning)

Experience

7 roles
  1. Solutions ConsultantCurrent
    Feedzai · Oct 2025 to present
  2. Solution Consultant
    Accertify · 2022 to 2025
  3. Risk Officer
    Adyen · 2020 to 2021
  4. Professional Services
    Accertify · 2016 to 2020

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