1KOMMA5° · 2 months ago
Senior Backend Engineer (Typescript) – Heartbeat AI (m/f/d)
United States
Full-time
Remote
Senior Level
7+ years exp1KOMMA5° is building Europe’s leading clean energy operating system, connecting solar, heat pumps, energy storage, and charging into one unified platform. As a Senior Backend Engineer, you will own the technical architecture for managing contracts and energy partner integrations, focusing on backend systems to ensure reliable integration with payment and CRM systems.
Charging InfrastructureEnergyEnergy StorageRenewable Energy
Responsibilities
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
Qualification
Required
5+ years as a backend or fullstack engineer, with strong expertise in TypeScript/Node.js
2+ years in a lead, staff, or senior engineer role, driving architectural initiatives
Strong experience with system and data integration, especially CRM, payment systems, or subscription/billing platforms
Deep understanding of contract-based workflows, state management, and event-driven systems
Experience with regulated industries (energy, fintech, healthcare, or similar) and understanding of compliance requirements
Experience designing and maintaining microservices at scale on cloud platforms (GCP preferred)
Strong skills in API design, versioning, and data modeling
Understanding of GDPR and data privacy regulations
Excellent communication and leadership skills — able to balance hands-on delivery with technical strategy
Fluent in English; German is a plus
Preferred
Experience in the energy, IoT, or utility sector
Background with billing systems or contract automation
Familiarity with Domain-Driven Design (DDD) and clean architecture
Exposure to data quality management and compliance processes
Benefits
You are part of a dynamic team with people who prove every day that they can make things happen and move companies forward with great positive impact
You move in flat hierarchies and have short decision-making paths. You can learn a lot quickly and get involved at different levels
You will be welcomed by a friendly and familiar team
You are part of the energy transition and recognize in your daily work what purpose it serves
You can work in one of our offices in Hamburg, Berlin or Munich
You create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass
Benefits and discounts are yours with Futurebens
Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time
Company
1KOMMA5°
1Komma5° is a home electrification and climatetech company that provides intelligent energy solutions and promotes a CO₂-neutral lifestyle.
1001-5000 employees
Funding
Current Stage
Late StageTotal Funding
$704.06MKey Investors
Sabanci Climate TechnologiesHamilton Lane2150
2025-07-28Series Unknown
2024-12-20Series Unknown· $156.47M
2024-03-04Private Equity
Leadership Team
Philipp Schröder
Co-Founder & CEO
Jannik Schall
Co-Founder & CPO
Recent News
ClimateHack Weekly
2025-10-25
Tech Funding News
2025-10-09
Company data provided by crunchbase