Staff Engineer - Heartbeat AI (m/f/d)

1KOMMA5At 1KOMMA5, we pursue a clear vision: Living on wind and sunlight forever for free. To make this a reality, we are building the energy system of the future with Heartbeat AI. Want to be part of it?We bring together regional craftsmanship and scalable software: We don't think of solar, batteries, heat pumps, and e-mobility as isolated components, but control them as an intelligent, integrated overall system in our virtual power plant. Directly connected to the electricity market – in real time, fully automated. This way, energy is used when it is available from renewables and particularly cost-effective. By 2030, our goal is to transition 1.5 million households to renewable energies. Over 3,000 people are working towards this every day, at more than 80 locations worldwide, from Finland to Australia.Want to take responsibility and build solutions that truly matter? Apply now and help us shape the energy world of tomorrow.Learn more about our Product & Tech team!Deine PositionOwn technical direction across Heartbeat AI's engineering domain (Mobile Apps, Energy Data, IoT Platform, and beyond), keeping architecture aligned with product directionAccountable for consistent execution of technical decisions within your domain, setting clear direction and holding the team accountable for implementationSet the technical bar for the team, stepping into the hardest problems yourself rather than just directing othersTranslate business and product requirements into technical solutionsMentor and challenge engineers within Heartbeat AI to accelerate their growthBuild a high-performing engineering culture within the Heartbeat AI teamEmbed security and reliability as direct customer valueArchitect our systems and APIs so AI agents operate as first-class users with machine-readable contracts and structured errors that let agents self-correctDrive Heartbeat AI's shift to agentic engineering, reshaping how the team works so agents execute safely while humans stay accountableOwn the architecture of the AI systems that power the product itself, from our EMS to our energy tariffTechnologies you will work with include:AI-assisted development with Cursor and agentic coding workflowsCloud & Infra: Google Cloud Platform, GKE (Kubernetes), Cloud Run, Terraform/IaC, VercelMessaging & IoT: Eclipse Hono, MQTT, MenderData & BI: PostgreSQL, BigQuery, SQLMesh, LookerObservability: Datadog, OpenTelemetryLanguages: TypeScript (Nest.js, Next.js), Java, Go, FlutterDevOps: CI/CD pipelines (GitHub Actions)Linear, Notion, Figma, MiroDein ProfilExtensive hands-on experience in software development with multiple general-purpose programming languages for a minimum of 5 yearsA proven track record of architecting scalable and secure systems, demonstrating a strong commitment to qualityExtensive experience in designing and implementing APIs that enable seamless integration and system communicationAn agile and result-oriented mindset, with a strong emphasis on collaboration and teamworkExperience communicating with stakeholders in business terms and understanding the technical implications of their requirementsExperience driving technical alignment within a team in fast-paced environments, including making and following through on critical technical decisionsExperience designing systems and APIs for agent consumption, with structured errors and clear contracts that let agents self-correctCapability to guide an engineering team through the shift to agentic engineering, reshaping workflows so agents execute safely while humans stay accountable for every outcomeExperience architecting AI/ML-driven or data-intensive systems (e.g. forecasting, real-time data pipelines), ideally in an energy or IoT contextStrong verbal and written communication skills in English, with proficiency in German considered a plusBenefitsYou are part of an international, dynamic, and highly motivated team of people who have proven to make things happenWith your work, you accelerate the "energy transition" and hence have a direct impact on our climateWork with and learn from other super-smart colleaguesYou will enjoy direct contact with core decision-makersYou will enjoy the best chances of entering full-time in one of Europe’s most thriving scaleupsYou work remotely (Germany-wide), with offices in Hamburg, Berlin or MunichCreate a healthy balance alongside your work and enjoy all the benefits of the EGYM WellpassBenefits and discounts are yours with FuturebensWhether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same timeIndividualised opportunities for professional developmentReporting directly to the CTOÜber unsDie 1KOMMA5 Gruppe ist ein CleanTech Unicorn mit der Mission alles zu elektrifizieren und über unsere KI-basierte Software Plattform Heartbeat AI jeden an den Strommarkt der Zukunft anzuschließen. Wir sind das marktführende Unternehmen für die Installation von CO2-neutralen Energiesystemen, insbesondere bei Photovoltaik, Energiespeicher, Wallbox, Wärmepumpe und Energiemanagement. 1KOMMA5 vereint die besten Unternehmen Deutschlands, Europas und darüber hinaus – wir wachsen weiter und das weltweit.