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

- **Company:** Ionos Group
- **Location:** San Sebastián de los Reyes, Spain
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Acceptance Test-Driven Development, C++ (Programming Language), CMake, Cursor, Software Debugging, Iterative and Incremental Development, Linux System Administration, Node.Js, Performance Tuning, Software Engineering, Software Requirements Analysis, Backend, Build Management, Production Code, Build Tools, Claude, Code Restructuring, Docker
- **Published:** October 16, 2026
- **Apply:** https://www.jobleads.com/es/job/ai-driven-software-engineer-node-js-c--san-sebastian-de-los-reyes--e761943a1ff0c62df1ce32700b2bf2700

## About the Role

* 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

## 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.

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