matti.ewert_
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intro

Matti Ewert

running samenspende.co · B.Sc. Mannheim, 2026

I build things end-to-end — product, code, and infrastructure. Usually all three at once.

about

I'm finishing a B.Sc. in Business Administration in Mannheim. On the side I run samenspende.co — a platform for sperm donors and recipients in Germany. Most of it I built and maintain myself.

Off-screen: marathons, road cycling, and gliding.

flight

Segelfliegen ist für mich die schönste Art, sehr leise sehr weit zu kommen: lesen, was die Luft gerade macht, Kreise in Thermik setzen, Entscheidungen treffen, bevor der Boden zu nah wirkt.

Hier kannst du meinen längsten Flug sehen: ein knapp 500 km langer Rundflug von Brandenburg über Sachsen und zurück, am 8. August 2020, gut fünf Stunden in der Luft.

Flug anzeigen
Glider DG300
Date 08 Aug 2020
Duration 5h 11m
Altitude 26 - 2,834 m
Distance ~ 500 km

→ alle Saisonflüge 2020

work
2025 →
samenspende.co · founder
Platform for sperm donors and recipients in Germany. 500+ members, ~70 new per month. Built solo — Astro on Cloudflare's edge, AWS Lambda · S3 · DynamoDB · Supabase.
↗
experience
2022 — 2026
Managing Director
Mannheim Investment Club e.V.
Led a 20-person team, €10k+ AUM, taught accounting & valuation to 150 analysts.
2023
Growth Development Intern
Enpal B.V.
Owned the A/B testing roadmap, shipped 20+ experiments, lifted conversion up to 30%.
2022
Cash Management Analyst
McMakler
Automated Salesforce invoicing; built a Python/Selenium bot that cut processing time 40%+.
education
2022 — 2026
B.Sc. Business Administration
University of Mannheim
Exchange semester at National Taiwan University, Fall 2024.
contact

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