Backend Developer

Software Quality & Security

• Write, test, and maintain high-quality, efficient, clean, reusable, and secure code.
• Ensure software quality through comprehensive testing (unit, integration, end-to-end) and adherence to development best practices.
• Practical knowledge of secure coding practices and relevant security standards.
• Understanding of GDPR, data privacy standards, and best practices.

Collaboration & Communication

• Collaborate effectively with cross-functional teams (frontend developers, Dev Ops engineers, software architects, product management, etc.).
• Clearly communicate technical decisions, concepts, and approaches to diverse audiences, including non-technical stakeholders.
• Participate in technical discussions, planning, and architecture decisions.
• Provide mentorship, technical leadership, offer guidance, and conduct code reviews to share knowledge within the team and beyond.

Continuous Improvement & Self-Development

• Stay current with relevant trends and technologies to continuously enhance our backend infrastructure and development practices.
• Show initiative, reliability, and motivation in managing tasks and responsibilities autonomously.
• Some familiarity with frontend development technologies (React, Vue, Angular) in the context of backend integration is desirable.

• Participate in the conceptualization, development, and automated testing of scalable APIs (REST & Graph
  
  QL).
• Participate in ongoing maintenance, monitoring, and enhancement of live software systems.
• Provide strategic input to software architecture and infrastructure decisions to support scalability and reliability.

Technical Skills

• In-depth knowledge of Laravel, Laravel Nova, and PHP.
• Experience working with Docker containers.
• Experience with developing and integrating RESTful and Graph
  
  QL APIs.
• Solid experience with MySQL databases, including schema design, optimization, and performance tuning.
• Basic knowledge of version control using Git (Git Lab).
• Knowledge of microservices and monolithic architecture and applying scalability best practices.
• Proficiency in implementing authentication and authorization strategies (JWT, OAuth).
• Familiarity with CI/CD pipelines and automating the software deployment lifecycle.
• Good knowledge of caching strategies, performance monitoring, debugging, and optimization tools.
• Experience handling asynchronous processing and queues.
• Experience in Python and/or Golang programming would be beneficial.
• Familiarity in working with the AWS cloud platform and their services is beneficial.
• Experience in visualization and conceptualization of data flows.

At Zellerfeld, we’re revolutionizing the footwear industry with cutting-edge 3D printing technology, and we want you to be part of this transformation. Our team is made up of engineers, designers, entrepreneurs, and innovators who thrive in a collaborative environment where every voice matters. We value contrarian thinking, humility, and continuous self-improvement, fostering a culture of innovation without rigid hierarchies. Diversity and inclusion are at our core—we focus on skills and passion, not labels.

By joining us, you’ll help shape the future of sustainable, ethical footwear and make a lasting impact on the industry. Let’s build the future together!