System Engineer · Rotterdam
Ruben Treurniet
Six years of daily building: trading systems, AI pipelines and web applications. Now pointed at your project.
The human, the cyborg and the blend
My name is Ruben. Technical through and through. Before going full-time into code I worked in mechanical and electrical engineering, eventually as workshop chief, project calculator and project manager, responsible for time, quality and margin on everything the company shipped.
The last six years I have been building every day: hundreds of automated trading systems, data pipelines, dashboards, automations and AI integrations. Before the AI era it was all hand-designed, hand-coded and run live. Now AI rides co-pilot through every layer of the work.
I'm a full-on AI enthusiast. I track every release, benchmark and paper, and I make sure every technique that actually works lands in my projects. Convince me your problem has a smarter solution, and I'll build it.
Hover the picture for the cyborg version. Scroll to watch the human slowly turn hybrid.
What you get
Four pillars
System engineer at the core
Understanding systems sits at the center of how I work. Every integration, every data layer and every edge case is designed before a line of code lands.
6+ years non-stop building
For six years straight I have been in code, data engineering and financial markets. Hundreds of builds, tested live, across many accounts at once.
AI enthusiast through and through
I track every release, benchmark and paper. Leading AI models run side by side in my work. Whatever wins today lands in your project tomorrow.
Full stack in one head
Scraping, event-driven automations, dashboards, RAG systems, web apps. I build the whole stack, no handoffs between developers.
Tech stack
What runs every day
Principles
How I work
Quality over speed
Speed comes from the pipeline. Quality comes from the review. Both at once.
Over-delivering is the default
Every project ships with a bit more than promised. Extra SEO pass, extra performance polish, extra documentation.
Transparent everywhere
Prices, timelines, limitations. You always hear what's going on, even when things slow down.
No middle layer
You talk to the person who builds. No account manager, no handoffs, no noise.
Want to build something together?
30 minutes, no sales pitch. You leave with a plan, even if we don't work together.