Stijn de Ruijter

Data & Analytics Consultant

Helping scale-ups and mid-size companies connect AI and LLMs to the data that actually matters.

Most companies don't have a data problem; they have a clarity problem. The data exists; in your warehouse, your CRM, your marketing tools. But nobody's connecting it to the decisions that actually move the business. That's where I come in. I help teams cut through the noise, set up the right infrastructure, and make their data work for something real.

What I do

Analytics Strategy

Figuring out what to measure across your data stack; from warehouse to CRM. And what to actually do with the results. No dashboards for the sake of dashboards.

Data Engineering

Building the pipelines, models, and integrations that make data reliable across teams and systems; not just available.

AI & LLM Integration

Connecting language models to your data and workflows. Prompt engineering, cost optimization, and making AI do something useful.

Tools I work with

Data & Engineering

Python

PostgreSQL

GCP

Power BI

OpenAI

Claude

Commercial & CRM

HubSpot

Zoho CRM

Among others.

Selected work

A few of the projects I've worked on. See the full list.

Optimized LLM pipelines for a healthcare AI startup; same quality, lower cost, switchable models.

LLM integration Prompt engineering Cost optimization

Built the lead attribution model from scratch for a Dutch energy company; 4 years, full-stack ownership.

Lead attribution Data modeling PostgreSQL

Co-built a real-time call transcription platform with AI summarization, sentiment analysis, and a transcript chatbot.

NLP Real-time transcription Product development

See all projects →

One person. No agency, no team of juniors, no 40-slide decks. Just good work, close to the problem.

Let's talk.

Typically embedded 2–4 days a week. Engagements from 3 months.

Book a meeting