Senior Software Engineer - Energy Markets (m/f/d)

1KOMMA5° is building an intelligent, integrated renewable energy system through its Heartbeat AI virtual power plant. The Senior Software Engineer - Energy Markets will drive the technical direction of the Energy Markets workstream by developing backend services, designing data-processing systems, making architectural decisions, and collaborating across engineering, product, and data teams.

Responsibilities:

• Build and optimize backend services for VPP operations and energy market integrations
• Design systems at the intersection of backend and data processing pipelines
• Drive technical decisions and guide fellow engineers on architectural choices
• Navigate between data engineering, backend engineering, and energy market domains
• Collaborate with product managers, data engineers, and data scientists across team boundaries

Requirements:

• Proven experience developing scalable backend solutions with TypeScript
• Data engineering fundamentals — designing systems bridging backend and data processing
• Hands-on experience with energy service interfaces (smart meters, optimization, load balancing)
• Strong knowledge of architectural patterns, CI/CD (GitHub Actions), and cloud infrastructure (GCP preferred)
• Ability to guide architectural decisions, mentor engineers, and coordinate across domains
• Passion for maintainable, documented, and testable code
• Experience building virtual power plant infrastructure and energy market integrations
• Python and BigQuery experience in Data Engineering or Machine Learning contexts
• IoT experience for grid balancing and demand response
• Infrastructure as Code experience (Terraform)
• Familiarity with energy market APIs (EPEX Spot, Montel)