Last-mile delivery platform – Bettermile / GLS eCom Lab (2018–2026)

Backend services for Bettermile: geocoding at over a million requests a day, live parcel tracking, back-office tools and data processing. Later, as the company grew, we set up and mentored new teams and introduced Kotlin, reactive services and infrastructure as code.

Kotlin · Spring WebFlux · React · Vue · Terraform · AWS

Game UI for SEED – Klang Games / SEED Industries (2019–2026)

In-game UI for the MMO simulation SEED, built on the EvolveUI framework: bindings, templates, animations and style sheets, kept under 2 ms per frame. We also trained Klang's engineers to maintain it.

C# · Unity3D · EvolveUI

IoT farming platform – CLAAS 365FarmNet (2015–2017)

Stream processing, persistence layers and modules for the 365FarmNet web app. We also ran Cassandra architecture and data-modeling training for over 20 engineers.

Java · Cassandra · Stream processing · OSGi · PostgreSQL

Shop & checkout services – Zalando SE (2015–2016)

API and architecture design for Zalando's checkout microservices: highly available services rated for over 5,000 requests per second, with autoscaling and fully automated deployments.

Java · Scala · React · AWS · Docker

foundd – Berlin (2011–2015)

Our own product: a recommendation engine for digital entertainment with over 200,000 users. We built the API, backend and collaborative-filtering recommenders and ran the company for four years.

Java · JS · Self-Hosted · Collaborative filtering · API design