Stories

Not a list of technologies. A few of the initiatives I owned — the ones worth telling properly. Real problems, real decisions, real outcomes.

Flink

PRISM

Replaced a 2-day ops cycle with a 2-hour self-serve workflow handling 500K–1M+ promotions per day.

ReactNext.jstRPCTypeScriptTanStack QueryPlaywright

Flink

Range Promotions

Enabled multi-SKU bundle promotions (e.g. add Pepsi + Red Bull + Fanta, get 20% off) — shipped across DE, NL, and FR, driving +18% average order value.

ReactNext.jsTypeScriptTanStack Query

Flink

Maximum Discounted Quantity (MDQ)

Introduced a per-item discount cap to stop bulk order abuse — units beyond the limit revert to full price, driving +5% average order value.

ReactNext.jsTypeScript

Trade Republic

core-observability

RFC to production in a new domain, week one. 3/5 web teams adopted. The LGTM migration RFC built on top of it.

TypeScriptVue 3ViteSentry SDK

Trade Republic

core-analytics

Replaced a €1M/year vendor contract with a consent-first, GDPR-compliant analytics SDK — adopted across Trade Republic's entire web platform.

€1M/yr

vendor cost eliminated

5 projects

audited safe to migrate

TypeScriptVue 3SnowplowVite