Senior Key Account Manager

1KOMMA5° At 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 . Your mission Full-Stack Development (Edge to Cloud): You develop the core components for our energy management system Heartbeat AI Enterprise – both locally on our IoT gateways (Edge) and scalably in our cloud-native backend architecture Gateway Programming (Go & Lua): You write high-performance code for our edge controllers. With Golang, you build robust system services and communication layers; with Lua, you create lightweight, dynamically adaptable control scripts and protocol drivers for inverters, BESS, and HVAC systems Cloud Services & Microservices: You design and program scalable microservices in Go within the cloud backend to process time-series data, telemetry, and manage fleet operations across hundreds of customer sites Interfaces & Protocols: You implement communication protocols for the IoT ecosystem (MQTT, REST/gRPC) as well as for local equipment communication (Modbus TCP/RTU) VPP & Trading Integration: You enable seamless data flow between local systems (meter readings, flexibilities) and our Virtual Power Plant for a…

Posted 30 Oct 2026

1KOMMA5° Bei 1KOMMA5° verfolgen wir eine Vision: Living on wind and sunlight forever for free . Dafür bauen wir mit Heartbeat AI das Energiesystem der Zukunft. Bist du dabei? Wir bringen regionales Handwerk und skalierbare Software zusammen: Solar, Speicher, Wärmepumpe und E-Mobilität denken wir nicht einzeln, sondern steuern sie als intelligentes, integriertes Gesamtsystem in unserem virtuellen Kraftwerk. Direkt verbunden mit dem Strommarkt – in Echtzeit, vollautomatisiert. So wird Energie dann genutzt, wenn sie erneuerbar verfügbar und besonders günstig ist. Bis 2030 wollen wir 1,5 Millionen Haushalte auf erneuerbare Energien umstellen. Über 3.000 Menschen arbeiten jeden Tag daran, an mehr als 80 Standorten weltweit, von Finnland bis Australien. Du willst Verantwortung übernehmen und Lösungen bauen, die wirklich zählen? Bewirb dich jetzt und gestalte mit uns die Energiewelt von morgen. Deine Position Full-Stack-Entwicklung (Edge to Cloud): Du entwickelst die Kernkomponenten für unser Energiemanagementsystem Heartbeat AI Enterprise – sowohl lokal auf unseren IoT-Gateways (Edge) als auch skalierbar in unserer cloudnativen Backend-Architektur Gateway-Programmierung (Go & Lua): Du schreibst hochperformanten Code für unsere Edge-Controller. Mit Golang baust du robuste Systemdienste und Kommunikationsschichten; mit Lua erstellst du leichtgewichtige, dynamisch anpassbare Steuerungsskripte und Protokoll-Treiber für Wechselrichter, BESS und HVAC-Systeme. Cloud Services & Microservices: Du konzipierst und programmierst in Go skalierbare Microservices im Cloud-Backend zur Verarbeitung von Zeitreihendaten, Telemetrie und für das Flottenmanagement von hunderten Kundenstandorten Schnittstellen & Protokolle: Du implementierst Kommunikationsprotokolle für das IoT-Umfeld (MQTT, REST/gRPC) sowie für die lokale Anlagenkommunikation (Modbus TCP/RTU) VPP & Trading Integration: Du ermöglichst den nahtlosen Datenfluss zwischen lokalen Anlagen (Zählerwerte, Flexibilitäten) und unserem V…

Posted 30 Oct 2026

Data Engineer Are you technically skilled, enjoy exploring new approaches, and want to avoid being held back by existing structures and processes? As a Data Engineer , you will join an environment where many things are being built from the ground up and where you can actively contribute your own technical ideas. From architecture and data pipelines to data quality and AI interfaces, you will have the opportunity to develop modern solutions while taking ownership of their implementation. Apply now and take advantage of the technical freedom this position offers. Your benefits as Data Engineer Compensation: Enjoy an attractive salary with an additional variable component that reflects your experience and technical expertise. Creative Freedom: Help build a central data platform from the ground up and bring your own technical ideas to the table. You will have plenty of room to explore modern solutions and actively shape the technical architecture. Flexibility: Organize your working day largely on your own and work flexibly from home or anywhere in Germany. At the same time, you should be willing to attend important meetings, workshops, and in person collaboration when required. Workation: Take up to four weeks of workation within the EU and, subject to agreement, potentially beyond the EU. Pension: Benefit from an occupational pension scheme with a 50% employer contribution. Development: Take advantage of individual training opportunities, language courses, and personal learning programs. International Environment: Work in an international environment where both German and English are used as business languages. Your tasks as Data Engineer Data Layer: Take ownership of operating and further developing the Databricks based data platform, including workspaces, jobs, and permissions. Data Pipelines: Develop robust ETL and ELT pipelines for banking, treasury, payments, export finance, and other data sources. Architecture: Design Data Lake and Lakehouse structures as well a…

Posted 30 Oct 2026