Mission Act as the execution engine of the team, transforming architectural specifications into robust, efficient, and production-ready code. You will work on building and optimizing a hybrid Node.js–C++ system, leveraging AI tools as a key accelerator to maximize development speed without compromising quality. Mission Act as the execution engine of the team, transforming architectural specifications into robust, efficient, and production-ready code. You will work on building and optimizing a hybrid Node.js–C++ system, leveraging AI tools as a key accelerator to maximize development speed without compromising quality. Responsibilities * Develop backend components in Node.js and high-performance integrations with C++ * Translate technical specifications into functional solutions and accurately * Use AI tools to accelerate development, validation, and code improvement * Apply test-driven approaches to ensure robustness and stability * Manage and optimize build environments (Docker, Make, CMake) * Analyze system performance and identify bottlenecks,



especially in Node.js C++ interactions * Refactor legacy code into clean, maintainable, and high-performance solutions * Collaborate closely with architecture roles to continuously improve the system Requirements Technical: * Strong experience with Node.js development * Ability to read, understand, and debug C++ code * Experience working in Linux environments * Familiarity with build tools and containers (Docker, Make, CMake) AI & Development * Hands-on experience with AI-assisted development tools (e.g., Cursor, Claude, or similar) * Ability to use AI as a productivity multiplier in software development * Experience with iterative development, testing, and validation workflows Profile * Strong English communication skills, as you will be working in an international team * Execution-driven mindset with strong focus on quality and results * Comfortable working in fast-paced environments * Strong interest in performance optim

📌 AI-Driven Software Engineer (Madrid)
🏢 IONOS Group
📍 Madrid