Company details
Ostrom
Digital green energy supplier serving German households with a fully online flat-rate tariff and a transparent dynamic pricing option.
Straßburger Straße 55, 10405 Berlin
Stability signals
- CEO
- Matthias Martensen
- Founders
- Matthias Martensen, Karl Villanueva
- Total raised
- €34M
- Recent rounds
- June 2025 · €20M · Series B
- December 2022 · €9M · Series A
- January 2022 · €4M · Pre-seed / Seed
- Founders' prior
companies - HelloFresh, Entrepreneur First
- Google rating
- 4.2 ★ · 713 reviews
Verified 2026-05-30
At a glance
Open roles
4
activeNew this month
1+1
Up from last monthNew openings
4
opened in the last 90 daysGerman requirement
75%
based on 4 of 4 rolesOpen roles over time
Open roles · 12 months
4open
2025-08 → 2026-07Jul is month to date
Open roles · 4
- Head of Marketing (m/w/d)Berlin / Remote · Posted 9 days agoGerman required
- Senior Product Designer (m/w/d)Berlin / Remote · Posted 7 weeks agoGerman required
- Customer Support Specialist (m/w/d)Berlin / Remote · Posted 2 months agoGerman required
- Mid-level Backend Engineer (m/f/d)Berlin / Remote · Posted 2 months agoNo German required