Berend Dumas
20+
Projects delivered

Make Optimal Use
Of Your Data

I specialize in, and highly enjoy, making data and AI work for you and your company. Creating tangible products and delivering results in a short period of time is my forte.

Trusted by leading companies

Track Record

bol.com
bol.com
E-commerce
Product Recommendations 2026

Optimized product recommendation algorithms serving personalized suggestions to over 1 million daily visitors — increasing relevance, click-through rates, and ultimately conversion across the platform.

Stakeholder Talks
Algorithm Optimization
Team Advisory
KNLTB
KNLTB
Sports
Rating Calculation Pipeline 2026

Advised on the architecture and setup of an in-house rating calculation pipeline — replacing external dependencies with a robust, maintainable system fully owned and operated by the KNLTB team.

Advisory
Architecture Design
In-House Build
bol.com
bol.com
E-commerce
AI-Enhanced Product Titles 2025

Leveraged AI to rewrite and optimize product titles at scale, improving Google rankings for hundreds of thousands of products and driving a significant uplift in organic search traffic.

Discovery
PoC
Large-Scale Experiment
bol.com
bol.com
E-commerce
Warehouse Returns Classification 2025

Improved the defect classification algorithm for warehouse returns, reducing manual inspection effort and increasing sorting accuracy — resulting in faster processing and lower operational costs.

Process Inspection
Algorithm Experiment
Production Rollout
MT Sprout
MT Sprout
Media
Website Behaviour Dashboard 2026

Built an end-to-end data pipeline feeding a live dashboard that surfaced clear insights into visitor behaviour — enabling the editorial team to make data-driven decisions on content and UX.

Data Extraction
Dashboard Build
Insights Delivery
bol.com
bol.com
E-commerce
In-House Banner Recommendation Engine 2024

Designed and built a proprietary banner recommendation engine to replace an external vendor — matching its performance from day one while saving €2 million in licensing costs annually.

Discovery
Engine Build
Benchmarking
Deployment
bol.com
bol.com
E-commerce
AI-Driven Creative Studio 2024

Founded bol.com's AI-driven creative studio — an internal capability for generating on-brand visual assets at scale, enabling unlimited product imagery without relying on costly manual production.

Concept & Vision
Studio Build
Brand Integration
Scale-up

Kickstart Your Data

Most companies have valuable data but no clear place to start. The bottleneck isn't the data — it's knowing what to do with it. Kickstart Your Data is a structured, hands-on day that takes you from raw data to tangible output before dinner.

What you'll walk away with
  • A clear picture of what your data is actually worth
  • Prioritized use cases, ranked by impact and feasibility
  • A working PoC — dashboard, app, or model — built the same day
  • A concrete plan for what to tackle next
  • A fun, energizing day
How the day is structured
09:00 – 10:30
Business Deep Dive
Explore what drives your business, which metrics matter, and where data makes the biggest difference.
10:30 – 12:30
Data Deep Dive
Inspect and extract your data — internal systems and external sources — and validate what's workable.
13:30 – 16:30
Build
Create a live dashboard, working model, or first application based on the morning's findings.
16:30 – 17:30
Wrap-Up
Walk through what was built and map out the next steps together.
Book Your Day €1.250 — One day. Real output.

Testimonials

★★★★★

"Incredibly pragmatic and fast. No unnecessary complexity — just clean, well-thought-out solutions that actually work in the real world."

MS
Mark Smith
CTO, Volksbank
★★★★★

"I appreciated the ability to communicate complex data problems in simple terms, and then actually deliver on every promise made. Highly recommended."

LP
Laura Peters
Programme Manager, ProRail

Technologies I work with