Job Description

Your mission

As a Senior Software Engineer, you will play a critical role in the development and optimization of the control software that drives our next-generation 3D printing systems. With a focus on performance, precision, and scalability, you will work across the software stack to bring our innovative hardware to life. You will decide architectural changes and guide the Zellerfeld printer setup into the future.

This position is ideal for someone who is excited about bridging software and hardware, has strong experience with mechatronic systems, and a deep understanding of 3D printer control—particularly with Klipper firmware. You will contribute to shaping the architecture, reliability, and future capabilities of our printer software stack.

Your profile

Your Role

• Design, develop, and maintain control software for our in-house 3D printers
• Implement robust communication interfaces between microcontrollers, sensors, actuators, and networked systems.
• Understand and improve the architecture of the current printer control implementation.
• Debug system-level issues across software and hardware boundaries using a structured, data-driven approach.
• Work closely with hardware and electrical engineering teams to ensure seamless end-to-end integration.
• Help build scalable systems that support remote diagnostics, monitoring, and fleet management.

Your Profile

• 2-5 years of experience in software development for hardware-driven systems, ideally in 3D printing or related mechatronic fields.
• Hands-on experience with 3D-printer Klipper firmware—including configuration, tuning, and extension of its codebase.
• Proficient in Python, particularly for automation, orchestration, and integration tasks.
• Familiarity with serial communication protocols such as UART, SPI, I2C, CAN, and networking (Ethernet/Wi-Fi).
• Comfortable working in Linux environments and with tools like Git, CI/CD pipelines, and debugging instruments.
• Self-motivated, detail-oriented, and capable of independently owning cross-functional technical projects.
• Experience with printer firmware development is a plus.
• This is an onsite position based in Hamburg

• Fluent in English; German is a plus but not mandatory.

Why us?

Join UsWe are an early-stage startup redefining how shoes are made—powered by 3D printing and a bold vision. In this role, you won’t just be supporting innovation; you’ll be leading it in one of the most critical areas of our production system.

Team and Work-LifeAt our Hamburg HQ, you’ll join a diverse, multidisciplinary team of engineers, creators, and entrepreneurs. Our flat hierarchy and collaborative culture ensure your expertise and ideas are always heard. We believe in challenging the norm—and having fun while doing it.

About UsZellerfeld is building the future of custom footwear using the world’s first fully 3D-printed shoe production platform. Our mission: printed shoes on every foot. With strong backing from industry leaders and creatives, we’re turning bold ideas into breakthrough products.

DiversityWe value diverse perspectives and unconventional paths. What matters most is your passion, your know-how, and your ability to deliver impact.