Full-Stack Growth Engineer (marketing-enthusiastic)

You'll work as a TypeScript engineer across React, React Native, and NestJS, implementing changes that directly impact conversion, activation, and growth., * 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)., 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.

Do you have experience in TypeScript?, * 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.

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.

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 of 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 Nationalitäten, 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 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., 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.