Staff Systems Architect (m/f/d)

With over 4 million domains and more than 2 million customers, as IONOS companies, we are among the largest web hosting providers worldwide. We operate two TÜV-certified data centers with over 70,000 servers. Our products are diverse and form the framework of our success, but You only come to life through our great employees. You are the central entity that protects and designs the technical interface between the Nextcloud Office Frontend and the LibreOffice C++ Core. Your task is to solve the “impossible” architectural challenges that arise when a massive, conditional C++ engine is synchronized with a modern, real-time Node.js environment. The foundation: You unveil communication protocols (WebSockets, WOPI, Shared Memory) that allow Node.js to control the C++ core with a latency of less than 10 ms. Digital Archaeology: You analyze and reconstruct existing C++ components to identify the “Source of Truth” for complex document states and transfer them to our modern JavaScript architecture. AI orchestration: You curate the technical context (RAG) for our AI sub agents. You make sure that the LLMs understand the special features of the LOKit core so that the rest of the team can develop precisely. High-Stakes Review: You act as a last instance for all code around the bridge. You check not only whether it works, but whether it is mathematically clean and robust for real-time collaboration. Qualifications Expert level in C++ (modern standards and deep understanding of legacy code). Ideally, you have experience with game engine architectures. Experience in high frequency trading environments – where the “costs of abstraction” are measured in milliseconds. Practical experience with AI development tools and AI orchestration, including managing RAG-based technical contexts to improve the accuracy of code generation and support engineering workflows. Benefit's hybrid working model. Flexible working hours through confidence work time. At some locations a licensed canteen and various free drinks. Modern office space with very good transport connection. Various employee discounts for activities and products. Employee events such as summer and winter parties, as well as workshops. Numerous training and development opportunities. Various health services, such as sports and health courses. We value diversity and welcome all applications – regardless of gender, nationality, ethnic and social origin, religion, disability, age as well as sexual orientation and identity, physical characteristics, marital status, or any other foreign criterion according to applicable law. .