Backend Developer

Zellerfeld is revolutionising the footwear industry with the world’s first 3D-printing technology for fully customizable shoes. Our goal is simple: printed shoes on every foot. We’re a passionate team of engineers, designers, and innovators, questioning the status quo and disrupting traditional manufacturing processes. Backed by founders, influencers, and celebrities who believe in our vision, we’re committed to making a lasting, positive impact—not just on the footwear industry, but on the world. Your Mission You'll be part of a small team of software developers building the factory of tomorrow. As our Backend Developer, you'll design and maintain the systems that power everything — from foot scanning and production to the consumer experience. You'll write clean, scalable code, contribute to architecture decisions, and help raise the bar for quality and security across our backend infrastructure. What You'll Do Design and maintain the REST and GraphQL APIs that power scanning, production, and the customer-facing productOwn services end-to-end: schema design, performance, observability, and the on-call reality that comes with live systemsShape architecture decisions as we evolve between monolith and selectively extracted servicesBuild async pipelines and queue-based workflows that move data between hardware, production, and customersWrite code that's tested at the unit, integration, and end-to-end level — and review code with the same standardMentor teammates and raise the bar on security, performance, and GDPR-conscious designCollaborate closely with frontend, DevOps, hardware, and product Your profile Strong PHP and Laravel experience, including Laravel Nova for internal toolingDeep MySQL skills — schema design, query optimization, and performance tuning under real loadSolid grasp of REST and GraphQL API design, plus authentication patterns (JWT, OAuth)Comfortable with Docker, Git/GitLab, and CI/CD as part of your normal workflowPractical experience with caching, queues, and async processingJudgment about when to reach for a microservice and when not toA security mindset and the discipline to apply it consistentlyAs a company specializing in both hardware and software, we value close collaboration within our team. Therefore, we are seeking candidates who can join us at our office in Hamburg. Nice to have Python or Go (we use both in adjacent systems)AWS experienceBackground in data flow modeling or systems where backend meets hardware/IoT Why Laravel, in case you're wondering It's a fair question for a company doing what we do. Laravel lets a small team move quickly across a wide surface area admin tooling, customer APIs, internal services without fragmenting the stack. Where we need different tools (Python for ML-adjacent work, Go for performance-critical paths), we use them. The backend is pragmatic, not dogmatic.