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IONOS Group Linkedin · Posted 2mo ago

AI-Driven Software Engineer (Node.js & C++)

Madrid, Madrid, Spain

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Indexed description

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 optimization and continuous improvement

What We Offer

  • Hybrid work model (in any of our offices in Alcobendas, Valencia, Barcelona, Sevilla, or Logroño)
  • Flexible working hours
  • Flexible compensation package
  • Discounts on Arsys products
  • Discounts on technology brands
  • Challenging technical environment with real high-performance system problems
  • Access to advanced AI tools with no usage restrictions
  • Close collaboration with senior profiles and a strong culture of continuous improvement
  • Personalized training and development plans
  • Biannual team events

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