バックエンドエンジニア

Listed as a remote role based in Stuttgart, Baden-Württemberg, Germany. Position: Senior Backend Engineer👨‍💻 🔋 About the Company Beff is a global Technology partner for Battery Development, mass production, and Data Management. Job Description We’re building a high-impact SaaS platform at the intersection of Battery Design, Development, and Production and software, focused on solving real-world problems in the battery ecosystem. We’re looking for a Senior Backend Engineer to take ownership of our backend systems -from architecture to production. You’ll work on systems that ingest, process, and serve complex data, and help shape a platform that customers rely on for critical decision-making. This is a high-ownership, hands-on role for someone who thrives in ambiguity, makes strong technical decisions, and ships reliable systems quickly without sacrificing quality. Experience in the battery sector and practical AI integration is a strong plus. Job Responsibilities: •Design and build scalable, resilient backend systems using Node.js (NestJS) and Python (FastAPI). •Own API design and service architecture, balancing performance, maintainability, and developer experience •Develop and evolve data models and pipelines for complex, real-world datasets (including battery-related data) •Build and maintain multi-service, cloud-native systems on AWS •Improve system observability, reliability, and incident response practices •Drive CI/CD, infrastructure-as-code (Terraform), and secure deployment workflows •Collaborate closely with product and frontend teams to deliver end-to-end features •Make pragmatic decisions - knowing when to move fast and when to invest in long-term architecture •Contribute to a culture of high-quality engineering through code reviews, testing, and continuous improvement What We’re Looking For Core Requirements •5+ years of experience building and operating production backend systems •Strong proficiency in Node.js and/or Python (experience with NestJS or FastAPI is a big plus) •Deep understanding of: -API design (REST, service boundaries, versioning) -Distributed systems and microservices tradeoffs -Data modeling and database performance •Proven experience building SaaS platforms or complex backend systems •Hands-on experience with: -AWS (or similar cloud platforms) -Docker and containerized environments -CI/CD pipelines and infrastructure-as-code •Strong experience with PostgreSQL and/or NoSQL databases •Ability to debug and resolve complex production issues •Comfortable working in a fast-moving, startup environment Strong Plus •Experience in the battery domain •Experience building data-intensive or real-time systems •Exposure to AI/ML systems, LLM integrations, or AI-powered features •Experience designing event-driven architectures •Proven experience in team management and driving technical best practices across backend teams. Tech Stack •Backend: Node.js (NestJS), Python (FastAPI) •Frontend: React.js (Hooks, Context, modern state management, component libraries) •Databases: PostgreSQL, Redis, NoSQL •Infrastructure: AWS, Docker, Terraform, GitHub Actions Why Join Us? •Work on real-world energy problems with tangible impact •Own systems end-to-end •Influence architecture, product, and technical direction •Build from first principles in a fast, execution-focused team •High autonomy, low bureaucracy, and meaningful responsibility Salary: Negotiable Application Process Please send your resume and CV with the subject "Senior Backend Engineer" to info@b-eff.com. Join our team at Beff, where we’re not just planning for the future, we’re creating it! Show more Show less Seniority level Entry level Employment type Full-time Job function Engineering and Information Technology Industries Services for Renewable Energy