Job
In this role, you will develop scalable backend services using Kotlin and Spring Boot, implement modern APIs, and focus on automating deployments and infrastructure with CI/CD and AI tools.
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Job technologies
Your role in the team
- Are you looking for a mission with real entrepreneurial responsibility and high strategic impact? In this hybrid role of Backend Development and Operations Engineering, you are our playmaker.
- You are responsible for building, scaling, and maintaining a lean, reliable backend and integration framework for our modern, cloud-native digital platform.
- At the same time, you establish forward-looking agentic software engineering within the team.
- With your work and the smart, productive use of AI agents, you lay the crucial foundation for an exciting energy experience of the future - event-driven, stable, and production-ready.
- You develop powerful and scalable backend services with Kotlin and Spring Boot.
- You design and implement modern APIs and integrations with REST, GraphQL, and OpenAPI.
- You are shaping the expansion of our cloud-native platform on AWS and driving its further development forward.
- You automate infrastructure, deployments, and operational processes with GitLab CI/CD and OpenTofu.
- You utilize modern coding agents such as Claude Code, Codex, Cursor, or comparable tools to elevate development, testing, and automation to a new level.
- You, together with the team, establish AI-Native Engineering Practices and actively shape the future of software development.
- You work closely with Product Management, Architecture, and Operations in an agile and interdisciplinary environment.
Our expectations of you
Qualifications
- Solid knowledge of Kotlin and Spring Boot.
- Proficient in CI/CD pipelines as well as Infrastructure as Code.
- Good knowledge of modern API and integration standards, especially REST, GraphQL, OpenAPI, and OAuth 2.0.
- An AI-native mindset and the motivation to fundamentally advance software development through the targeted use of AI.
- A high level of ownership, pragmatism, and quality awareness.
- Excellent German and English skills.
Experience
- Several years of experience in the development and operation of modern backend systems.
- Experience with AWS and cloud-native architectures.
- Practical experience with Claude Code, Codex, Cursor, or comparable AI-assisted development tools.
What we offer
- We have been recognized by Great Place to Work as an attractive employer and offer you a dynamic, exciting, and flexible work environment where something develops every day.
- Your ideas are important to us; they are heard and implemented.
- A highly motivated team with flat hierarchies and short communication channels.
- A workplace in the heart of Cologne and the opportunity for hybrid work.
- A lot of fun at work and in the team.
- Performance-based pay and 30 days of vacation per year.
- Subsidy for the job ticket and free parking.
Topics you will work on
Job locations
About your employer
Passende Produkte, smarte Dienstleistungen, bequemer Service: Wir haben uns das Ziel gesetzt, die Energieversorgung für unsere Kunden so einfach wie möglich zu machen. Dafür setzen wir auf Digitalisierung, Seite, agiles Arbeiten – und Kolleginnen und Kollegen, die neue Ideen einbringen und flache Hierarchien schätzen.
- 2007
- Established Company
- Onsite, Hybrid
- Power Sector, Economy
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