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

About the Position

We are looking for an AI-Driven Software Engineer (Node.js & C++) to join arsys, a leading Spanish company in the IT sector with over 25 years of experience. Our company is part of the IONOS Group, Europe's leading digitalization partner for small and medium-sized companies.

Responsibilities

• Develop backend components in Node.js and high-performance integrations with C++
• Translate technical specifications into functional solutions
• 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
• 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 a strong focus on quality and results
• Comfortable working in fast-paced environments
• Strong interest in performance optimization and continuous improvement

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

About the Company

We are a growing company with more than 400 employees and offices in Logroño, Madrid, Barcelona, Seville, and Valencia. Since August 2013, we have been part of the IONOS Group, Europe's leading digitalization partner for small and medium-sized companies.

In short, we are a multicultural team that’s passionate about technology, bringing our professional experience from over a dozen countries: Germany, Argentina, Spain, the United States, France, the Philippines, Italy, Poland, Portugal, the United Kingdom, Romania...