Evidence before opinions.
I combine qualitative context with quantitative patterns: customer conversations, behavioral data, support themes, and the constraints people usually discover too late.
Product design × insights engineering
I turn messy product evidence into decisions you can test.
I’m Holger Indervoort. I work across data analysis, UX design, and customer insight in complex B2B software — then build the prototype when talking stops being useful.
See selected work01 EvidenceConversations · behavior · constraints
02 DecisionsOpportunities · trade-offs · direction
03 PrototypesWorking systems · tested assumptions
Selected work / 06
Work that connects the interface to the evidence.
Anonymized examples from B2B SaaS and internal product practice. Specifics, screenshots, and metrics are deliberately marked for replacement.
How I work / 03
Start with the signal.
End with something testable.
Opportunities before outputs.
I turn evidence into a decision frame. The point is not to generate more features. It is to identify the right problem, expose trade-offs, and give the team something precise to disagree about.
Working prototypes before theatre.
AI coding tools make it practical to move from a credible specification to a testable product slice quickly. A working interaction settles questions that twelve comments in a design file will not.
The process is rigorous. The ceremony is negotiable.
Tools / Actual use
Tools are part of the method, not a personality.
The stack changes. The workflow — investigate, structure, prototype, test — is the durable part.
Figma
Flows, systems, prototypes, interface critique, and collaborative decision-making.
Python
Data pipelines, clustering, classification, dashboard inputs, and the unglamorous work between export and insight.
Claude · ChatGPT · Codex
Research synthesis, code generation, critique, and rapid iteration — used inside the work, not sprinkled over it afterward.
HTML · CSS · JavaScript
Working, inspectable prototypes that make abstract product conversations concrete.
Contact
Complex product problem?
I’m interested.
For product design, customer insight, prototyping, or an unusually specific logistics-software conversation.