Full-Stack Engineer; marketing

🌐 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 41% being female and from 16+ nationalities
, and steadily growing. Having raised over €40 M in total, we are looking for passionate people to join us on our mission! 🚀

🇩🇪 Wir haben eine klare Mission:
Wir bauen Europas führende Plattform für Energiemanagement, um faire und saubere Energie für alle zugänglich zu machen. ⚡

Unser Team ist vielfältig – wir sind über 50 Personen aus mehr als 16 National itäten
, mit einem Frauenanteil von 41 %. Und wir wachsen weiter!
Mit über 40 Mio. € an Finanzierung suchen wir nach motivierten Menschen, die gemeinsam mit uns die Energiezukunft gestalten wollen. 🚀

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 Type Script engineer across React, React Native, and NestJS
, implementing changes that directly impact conversion, activation, and growth
.

Interviews only start on January 2026.

• 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).

• 3+ years as a full-stack Software Engineer.

• Strong with Type Script .

• 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
  .

• Webflow experience (especially custom JS embeds).

• Experience working with marketing or growth teams.

• Experience with or other automation tools.

• German language skills.

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:
Neo Grid™.

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.

🤝
Wor…