Senior Backend Engineer (Typescript) – Heartbeat AI (m / f / d)

1KOMMA5°

At 1KOMMA5°, we are building Europe’s leading clean energy operating system — connecting solar, heat pumps, energy storage, and charging into one unified platform.

As Senior Backend Engineer (Typescript) – Heartbeat AI (m / f / d), you will own the technical architecture behind how we manage, automate, and connect contracts and energy partner integrations across the Heartbeat AI platform.

Your focus will be on backend systems, ensuring that customer and energy contracts are reliably integrated with our payment and CRM systems to support scalable post-booking, activation, and billing workflows.

You will work with a cross-functional team of 10 (Product Manager, Designer, Backend Engineers, Frontend, Mobile) and work closely with other product and platform teams to evolve our distributed architecture and integration landscape.

Become a part of our mission and learn about our Product & Tech team!

Deine Position

• Lead Architecture : Design and evolve the contract lifecycle, covering creation, activation, provisioning, cancellation, and optimization flows.
• Drive Systems Integration : Own the technical strategy for connecting contract services with payment, CRM, and external energy partner APIs using asynchronous event-driven patterns (Pub / Sub, message queues, webhooks).
• Collaborate Across Domains : Work closely with Product, Design, and Platform teams to ensure contract and partner data flows are consistent and reliable across systems.
• Ensure Data Quality & Observability : Implement robust validation, monitoring, and tracing for integrations with external systems and internal services.
• Mentor and Guide Engineers : Coach team members in software design, integration best practices, and clean architecture principles.
• Contribute as SME : Act as Subject Matter Expert (SME) for the Contract Management domain : reviewing PRs, documenting core system behavior, and ensuring technical decisions align with the broader platform vision.
• Reliability : Balance architectural vision with hands-on implementation, ensuring scalable, maintainable, and production-ready solutions.

Technologies you will work with :

Dein Profil

Bonus points for :

Benefits

Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time

If you read this to the end, include the word “rubberduck” in your application.

Bei 1KOMMA5° bauen wir Europas führende Energie-Software-Plattform “Heartbeat” und schaffen so ein virtuelles Kraftwerk , das Photovoltaik, Stromspeicher, Wärmepumpen und Ladesäulen der Kunden verknüpft und so die Rentabilität vernetzter Kundenanlagen deutlich erhöht. Wir bieten Kunden zudem einen " One-Stop-Shop" für den Kauf und die Installation individueller und intelligenter Energie-Systemlösungen, damit jeder Haushalt schnell und professionell klimaneutral wohnen, heizen und mobil sein kann. Gleichzeitig arbeiten wir in unserer Technologie-Sparte an der Weiterentwicklung und dem Ausbau der Heartbeat-Software, um Kunden weltweit mit dem Strommarkt zu vernetzen und so immer den günstigsten und saubersten Stromtarif anbieten zu können.

Hast du Lust, die Energierevolution mit uns anzugehen? Dann bewirb dich jetzt und werde Teil unserer Mission!