Join Ostrom, Europe's leading energy management platform, as a Full-Stack Growth Engineer. Work on web and mobile flows, improve conversion rates, and integrate SDKs/APIs. Collaborate with marketing and growth teams.
Key Highlights
Technical Skills Required
Benefits & Perks
Job Description
🌐 We are on the mission to build Europe’s leading energy management platform to provide fair, clean energy to everyone. ⚡
We’re a diverse team of 50+ employees, with about half being female and from 16+ nationalities, and steadily growing. Having raised of over €40 M in total, we are looking for passionate people to join us on our mission! 🚀
Your mission
We’re looking for a Full-Stack Growth Engineer (with strong marketing enthusiasm) who can move fast, ship experiments, and unblock Marketing on anything that touches the product — frontend, mobile, or backend.
You’ll work as a TypeScript engineer across React, React Native, and NestJS, implementing changes that directly impact conversion, activation, and growth.
Interviews only start on January 2026.
What you’ll be keeping busy with
- Implement and iterate on the web and mobile flows (React / React Native).
- Improve conversion by fixing UX logic issues, price displays, funnel drop-offs, and other blockers.
- Integrate SDKs/APIs based on vendor documentation (Amplitude, Adjust, Intercom, etc.).
- Help run A/B tests, experiments, and feature flags end-to-end.
- Use AI coding tools (Cursor, Claude Code, etc.) to move faster —
- not a vibe coder, but an engineer willing to yield the AI magic to their powers.
- Set up and maintain tracking (GTM — nice to have, not required).
Your profile
- 3+ years as a full-stack Software Engineer.
- Strong with TypeScript.
- Experience with React and/or React Native.
- Experience with Node.js / NestJS.
- Good SQL knowledge.
- Solid understanding of APIs, SDK integrations, and Webhooks.
- Experience with A/B testing or building growth/product experiments.
- Strong communication in English.
Nice to have
- Webflow experience (especially custom JS embeds).
- Experience working with marketing or growth teams.
- Experience with Make.com or other automation tools.
- German language skills.
Interview process
- TestGorilla Assessment (early January)
- A short online assessment to help us understand your skills and working style.
- Technical Interview with our Engineering Team
- A conversation focused on your technical abilities, problem-solving approach, and practical experience.
- Interview with our Head of Marketing / Product Owner
- This round explores cross-functional collaboration, communication, and how you work with different teams.
- Co-Founder Interview
- A final conversation to discuss alignment, culture, ownership, and your impact on Ostrom as a whole.
🌐 About Us
We’re Germany’s fastest-growing digital green energy provider and a Certified B Corp™ , driving the energy transition by making renewable energy more accessible and inclusive.
How? Through variable tariffs, dynamic pricing, smart EV charging, heat pump and solar optimization, and Germany’s first virtual power plant: NeoGrid™.
At Ostrom, you’ll work in a dynamic, open environment where you can be yourself, take on challenges, and grow both personally and professionally.
🌱Environmental Impact: Each customer who switches to Ostrom on average helps offset 1.5 tons of CO2 emissions per year compared to the average German energy mix.
📈 VSOP: On top of offering a competitive salary you will have access to company shares to ensure you can truly be part of the journey.
✈️ Relocation package: We won't let distance get in the way, we offer visa and relocation support.
👭 Trust-based Team: A truly flat hierarchy and transparent company culture, where everyone’s voice matters.
💪🏽Benefits: An annual learning budget, company-pension scheme, company events, discounted gym membership, public transport ticket, e-bike or e-moped, Futurebens or monthly vouchers - the choice is yours.
💬 Stay In The Loop: We believe in transparent communication — from weekly town halls and quarterly updates to regular retrospectives. Got feedback or an idea? We’re all ears.
🤝 Work Together, Celebrate Together: We thrive on collaboration. Wins are shared and so are the celebrations from monthly happy hours to team trips and company events.
🌍 Work Your Way: Whether you prefer the office, your home desk, or a sunny spot in Sardinia — you work where you work best.
🚀 Learn By Doing: We grow together with personal development paths, learning budgets, and regular knowledge-sharing sessions. Try things out, learn along the way, and keep moving forward.