Bridging psychology and product

Hi, I'm Joshua — a user researcher based in Berlin, with a background in psychology, and about 6 years of experience building and scaling research practices across industries in companies like Vanguard, Grover, and AOK. I am currently building digital public services with and for the justice system at the German government's DigitalService.

Recent notes

Dec 15, 2025 · PIAZZA Conference · In German

Counting what counts: Naming the value of digital transformation

A workshop I co-led with a colleague at PIAZZA conference on impact-oriented measurement in public sector digitalization.
May 19, 2025 · DigitalService · In German

Cost savings analysis for digital legal aid applications

A report I wrote estimating cost savings and return on investment from digitalizing legal aid applications.
May 25, 2024

Electify: Can AI help voter decision-making?

Thoughts and lessons learned from my final project at Data Science Retreat.
Feb 23, 2024

Building an LLM-powered user review summarization app

Notes on a small project at Data Science Retreat.
Dec 6, 2023

When weighted survey analysis makes sense—and how to do it in R

A quickstart guide.