Senior Software Engineer (Backend, Java) in Berlin

• Doodle is a B2B SaaS platform used by millions of professionals to coordinate meetings and collaboration across teams and companies
• We are building the future of scheduling and productivity
• We work on hard problems at the meeting point of human collaboration and digital efficiency
• We craft elegant solutions to complex problems, and we are looking for passionate problem solvers who share this drive
• We aren’t just looking for someone to “write code.” You are more than a coder
• You are a proactive builder and a continuous learner
• You thrive on shipping products that matter
• You always find a way to reach the goal
• Our core backend runs on a high performance, polyglot ecosystem of Go and Java services built on Kafka, aiming for high throughput
• We value engineers who are naturally curious and proactive
• You will read, trace, and understand workflows across the entire codebase, looking beyond your primary language to solve complex problems
• We love high velocity
• We actively encourage our engineers to use LLM and agentic tools (Specs, Loops, and agentic workflows) to iterate fast and build systems
• We stay provider agnostic (Anthropic, OpenAI, Cursor, local models, or self hosted models in the cloud)
• Use these tools to supercharge your iterations
• We pair that speed with deep pride in ownership
• A natural “READ THE CODE” mindset, where you keep a full understanding of, and full accountability for, every line you bring across the finish line
• 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

The Distributed Layer: Practical experience with distributed systems, microservices, and event driven architectures built on KafkaThe Foundation: A Bachelor’s in Computer Science, a related technical field, or equal practical experienceThe Systems Mind: Strong systems level thinking, with the ability to read, debug, and understand multi language codebasesThe Toolkit: Professional experience designing, developing, and shipping production ready, highly concurrent backend services in JavaYou’ll thrive here if you are a builder who values customer impact as much as clean systemsThe AI Edge: Advanced experience using modern AI assisted engineering workflows (Specs, Loops, agentic tools) to safely speed up backend testing, generation, and architecture validationThe 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 designThe API Layer: Experience designing and serving APIs, ideally GraphQL

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