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# Software Engineer, Backend (Java) - All Genders

- **Company:** Doodle
- **Location:** Berlin, Germany
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Cloud Computing, Data Structures, Software Debugging, Distributed Systems, Event-Driven Programming, Query Optimization, Data Streaming, Large Language Models, Backend, Event Driven Architecture, Containerization, Kubernetes, Information Technology, Apache Kafka, Reactive Programming, Codebase, Graphql, Front End Software Development, Docker, Microservices
- **Published:** October 7, 2026
- **Apply:** https://www.adzuna.de/details/5913086278

## About the Role

* The Foundation: A Bachelor's in Computer Science, a related technical field, or equal practical experience.
 * The Toolkit: Professional experience designing, developing, and shipping production ready, highly concurrent backend services in Java.
 * The Systems Mind: Strong systems level thinking, with the ability to read, debug, and understand multi language codebases.
 * The Distributed Layer: Practical experience with distributed systems, microservices, and event driven architectures built on Kafka.
Nice to have:

 * The AI Edge: Advanced experience using modern AI assisted engineering workflows (Specs, Loops, agentic tools) to safely speed up backend testing, generation, and architecture validation.
 * The Infra: Deep knowledge of reactive programming models, cloud infrastructure (AWS or GCP), and containerization (Docker, Kubernetes).
 * The Fundamentals: A strong foundation in computer science fundamentals: data structures, algorithms, and distributed system design.
 * The API Layer: Experience designing and serving APIs, ideally GraphQL.
 * The Location: You are based in Germany with full right to work. We cannot sponsor visas or support relocation at this time.

## Description

* Own the Backend: Design, build, and deploy robust, scalable, high performance backend services in Java that power our core platforms.
 * Serve the Data: Expose backend endpoints through GraphQL, with efficient data fetching, query optimization, and clean integration with frontend systems.
 * Architect for Scale: Build event driven solutions on Kafka for seamless data flow, system reactivity, and extreme reliability.
 * See the Whole System: Keep full visibility across the backend ecosystem, and understand how services integrate across our distributed infrastructure.
 * Ship with AI: Use LLM and agentic tools to move fast, while keeping total ownership and full understanding of the generated code.
 * Solve Time: Tackle the hard challenges around how Time is managed, processed, and presented across the globe.
 * Translate the Hard Stuff: Work closely with cross functional teams to turn complex scheduling requirements into clean, elegant technical solutions.