Senior Software Engineer — Secure, Hardware-Integrated Systems

Our client is a deep-tech startup developing advanced secure communication solutions based on quantum technologies. The company operates at the intersection of photonics, hardware systems, and distributed software, delivering next-generation infrastructure for highly secure data transmission. Its multidisciplinary team designs and integrates hardware, software, and photonic components to address emerging challenges in secure communications and network systems.

Mission
The mission of this role is to design, develop, and maintain robust software systems that support advanced communication technologies. The position contributes directly to the scalability, reliability, and performance of complex hardware-integrated platforms, while shaping architectural decisions and ensuring high-quality engineering standards within the team.

Responsibilities

• Software Development & System Integration
  • Design and implement software components for advanced communication systems, closely interacting with hardware platforms
  • Develop scalable and maintainable code using modern software engineering practices
  • Contribute to system architecture and technical decision-making
• Code Quality & Engineering Practices
  • Review and validate code through merge request processes
  • Ensure high standards of code quality, testing, and documentation
  • Participate in continuous integration and deployment workflows
• Collaboration & Technical Leadership
  • Work closely with hardware and multidisciplinary engineering teams
  • Provide technical guidance and mentorship to junior developers
  • Contribute to agile development processes and team knowledge sharing
• Networking & Security (as applicable)
  • Implement and maintain secure communication protocols (e.g., TLS/SSL, certificates)
  • Contribute to network programming and secure system design

Required Qualifications

• Minimum 5 years of professional experience in software development
• Strong proficiency in Python and experience with version control systems (e.g., Git)
• Experience developing software that interfaces with hardware systems
• Proven experience in code reviews, ensuring code quality, and contributing to architectural decisions
• Knowledge of modern software development methodologies and tools (CI/CD, testing frameworks)
• Professional proficiency in English and at least intermediate level in German (minimum B2)

Preferred Experience

• Experience with technologies such as gRPC, REST APIs, gNMI, or similar communication protocols
• Familiarity with frontend frameworks (e.g., Vue.js) or low-level programming languages (e.g., C++, Verilog)
• Knowledge of network programming, cryptography, or software-defined networking (SDN)
• Experience with embedded systems or build systems (e.g., Yocto)
• Background in highly technical or research-driven environments