Senior Backend Engineer Kotlin/Spring Boot (m/w/d)
Core
Building and operating a lean, reliable backend and integration framework for a modern, cloud-native digital energy platform.
Role type
Senior Backend Engineer (Kotlin/Spring Boot)
Builds
Cloud-native backend services, event-driven architectures, and APIs for the E WIE EINFACH energy platform.
Domain
Energy / Utilities / Cloud Infrastructure
Deliverable
production ML models | product features | infrastructure
Required skills
Kotlin, Spring Boot, AWS, REST/GraphQL API design, Infrastructure as Code, CI/CD, OAuth2/JWT, AI Agent workflows
Preferred skills
AI-Native Developer Mindset, DevOps fundamentals, API-first systems, asynchronous integrations
Technologies
Kotlin, Spring Boot, AWS, GitLab, Claude Code, Cursor, Windsurf
Responsibilities
Develop focused backend services for integrations and custom logic; Design and implement event-driven architectures on AWS; Conceive, specify, and implement REST/GraphQL APIs with versioning and auth; Integrate third-party services (payments, credit checks, notifications); Ensure end-to-end backend delivery and production readiness; Maintain Infrastructure as Code and CI/CD pipelines; Collaborate with Architecture, Operations, and QA in Agile teams.
Seniority
Senior, hands-on IC
