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 op

📌 AI-Driven Software Engineer (San Sebastián de los Reyes)
🏢 IONOS Group
📍 San Sebastián de los Reyes