NL

Projects

An impression of my work: a small selection of projects from recent years.

Alphaparty - trading algorithms & order execution

As interim CTO I build the trading algorithms and the order execution software in Rust, across nine exchanges, and lead the AI-driven strategy research.

Wepublic

Building the Stakeholder Intelligence Monitor since 2015; now LLM features that let public affairs advisers spot what is happening in The Hague and Brussels sooner. Ruby & Python.

Hibou

Since 2018 I have been building the Keyword Inventory Tool, which Hibou uses to visualise keyword and SEO data. Python & PHP.

XEMM

Cross Exchange Market Making. Built in Rust.

Adyen

Payment integrations for major online stores, including Adyen's Shopify connection through ActiveMerchant. Ruby.

Leapforce

Architecture and code reviews for Leapforce's development team, in Node.js and TypeScript.

MakerStreet

As solution architect and tech lead I led a cloud-native development team on AWS, in TypeScript.

Factris

Built the factoring platform's backend APIs from scratch; the team grew to eight developers along the way. Ruby on Rails.

Verint

Four years as a freelance senior developer, part-time, on FlexManager, a Verint product.

Pupla

Type an idea and AI draws the colouring page. Behind it, an MCP server of its own lets AI agents run the site: translations, categories, publishing. Ruby on Rails.

JoinYou

API development in Django, with a React Native app.

Swimgym.com

Online swim training; I built the platform behind it in Ruby on Rails.

ter Haar & Lamme

Enter a candidate's test scores, get the report: the system picks the right text and charts for every score. Ruby on Rails.

Kaagman & Kortekaas

Ongoing development and support of the tech behind the restaurant: website, hosting and integrations.