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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Backend Software Engineer - - **Company:** Beroe X nnamu GmbH - **Location:** München, Germany (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Multitier Architecture, Agile Methodology, Artificial Intelligence, Amazon Web Services, User Authentication, Automation of Tests, Microsoft Azure, Software Quality, Code Review, Continuous Integration, Data Stores, Amazon DynamoDB, Game Theory, Github, Python (Programming Language), Enterprise Messaging Systems, NoSQL, E2e Testing, Systems Integration, AWS Cdk, Data Logging, Google Cloud, Large Language Models, State Machines, AWS Lambda, Backend, Gitlab, Git, Fastapi, Event Driven Architecture, Build Management, Containerization, Real Time Data, Front End Software Development, Api Gateway, Amazon Simple Queue Service (SQS), Terraform, Software Version Control, Serverless Computing, Docker - **Published:** September 14, 2026 - **Apply:** https://www.adzuna.de/details/5881164144 ## About the Role * 5+ years of professional experience building and maintaining backend systems in production. * Expert-level proficiency in Python, with hands-on experience using FastAPI. * Hands-on experience designing systems using Hexagonal architecture (or similar patterns like Clean Architecture or Ports & Adapters). * Strong experience with AWS serverless services: Lambda, Step Functions, API Gateway. * Hands-on experience with AWS SAM (Serverless Application Model) for building and deploying serverless applications. * Solid experience with DynamoDB or other NoSQL data stores, including data modeling and access pattern design. * Experience with AWS Cognito for authentication and authorization. * Experience with SES or similar services for transactional email/messaging. * Familiarity with IoT Core or event-driven/IoT architectures. * Proficient with version control systems such as Git (GitLab, GitHub). * Familiarity with Agile development methodologies, CI/CD pipelines, and automated testing. * Strong technical spec writing skills, with the ability to translate requirements into clear, actionable documentation. * Excellent communication skills, a collaborative mindset, and a strong sense of ownership. Bonus Qualifications * Experience with Infrastructure as Code tools beyond SAM (e.g., Terraform, AWS CDK). * Exposure to event-driven architectures and messaging systems (e.g., SQS, SNS, EventBridge). * Experience with other cloud platforms (e.g., Azure, Google Cloud Platform) in addition to AWS. * Experience using AI tools for development to boost productivity * Integrating AI/LLM capabilities into backend systems. * Understanding of observability practices (logging, tracing, monitoring) in distributed/serverless systems. * Experience with containerization (Docker) and orchestration. * Interest or experience in game theory, negotiation systems, or applied AI/ML backends. * Experience working in regulated or high-security environments (data privacy, compliance). ## Description We are looking for a Senior Backend Software Engineer to join our cross-functional product team. You will play a pivotal role in designing, developing, and scaling the backend systems that power our AI-driven negotiation platform. You'll work closely with product managers, frontend engineers, and data teams to build robust, secure, and highly available services., * Architect, develop, and maintain scalable backend services using Python and FastAPI, following Hexagonal (Ports & Adapters) architecture principles. * Design and build serverless applications using AWS Lambda, Step Functions, and API Gateway. * Model and manage data using DynamoDB, ensuring performant and cost-effective access patterns. * Implement secure authentication and authorization flows using Cognito. * Build event-driven and asynchronous workflows using Step Functions and SES for transactional messaging. * Integrate with IoT Core to support device connectivity and real-time data ingestion. * Ensure code quality through code reviews, automated testing, and adherence to best practices. * Collaborate with cross-functional teams to define and deliver complete, end-to-end solutions. * Write comprehensive unit, integration, and end-to-end tests to ensure code quality and maintainability. ## Related Videos - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) - [Next Level Enterprise Architecture: Modular, Flexible, Scalable, Multichannel and AI-Ready?](https://www.wearedevelopers.com/videos/1017-next-level-enterprise-architecture-modular-flexible-scalable-multichannel-and-ai-ready) ## Related Articles - [Backend Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/196-backend-developer-salary-in-germany-2023) - [Frontend Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/195-frontend-developer-salary-in-germany-2023) - [Fullstack developer salary in Germany [2023]](https://www.wearedevelopers.com/magazine/197-fullstack-developer-salary-in-germany-2023) - [Best Coding Boot Camps in Germany](https://www.wearedevelopers.com/magazine/237-best-coding-boot-camps-in-germany) - [The Biggest German Tech Companies](https://www.wearedevelopers.com/magazine/424-the-biggest-german-tech-companies) - [Software Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/194-software-developer-salary-in-germany-2023)