Full-Stack Growth Engineer (marketing-enthusiastic)

Ostrom GmbH is a digital green energy provider headquartered in Berlin, Germany, dedicated to accelerating the transition to renewable energy. Founded in January 2021 by Matthias Martensen and Karl Villanueva, the company was established to disrupt the traditionally bureaucratic and outdated German energy market. Ostrom's core mission is to make green energy accessible, affordable, and straightforward for households across Germany and eventually Europe. The company operates on a technology-first approach, offering a seamless, multilingual, and digital-first customer experience that empowers consumers to easily switch to, manage, and reduce their electricity consumption. By providing 100% certified green electricity through a single, transparent monthly tariff, Ostrom eliminates the complexity of long-term contracts and hidden fees that are common in the industry. This model is designed to be fair and simple, offering electricity at cost with a flat monthly fee.

The company's digital platform and mobile application are central to its service, allowing customers to track their energy usage in real-time, manage payments, and access responsive customer support. Since its launch in May 2021, Ostrom has demonstrated significant growth, acquiring customers from over 900 previous energy providers and supplying electricity to over 4,700 cities and towns across Germany. Ostrom has also distinguished itself by becoming a certified B Corporation, underscoring its commitment to high standards of social and environmental performance. The company is actively involved in advancing smart energy solutions, including the rollout of smart meters, dynamic electricity tariffs, and the development of a Virtual Power Plant (VPP) that integrates electric vehicles. Through continuous innovation and a focus on automation, Ostrom aims to maintain a lean operational structure while scaling its impact on the energy transition.