AI-Driven Backend Engineer (Node.js/C++) | Hybrid

arsys EN; Madrid; Hybrid; EUR 60,000 - 80,000; Full time

Benefits offered by this job

Hybrid work model

Flexible working hours

Flexible compensation package

Discounts on Arsys products

Access to AI tools

Job summary

Arsys is seeking a passionate backend engineer to transform architectural specifications into robust, production-ready code in a hybrid Node.js–C++ system. You will leverage AI tools to maximize development speed while maintaining high quality.

You will build and optimize backend components, translate specs into functional solutions, and work in an international team with flexible hours. This role offers hybrid work in Alcobendas, Valencia, Barcelona, Sevilla, or Logroño and a challenging

Qualifications

• Strong experience with Node.js development.
• Ability to read, understand, and debug C++ code.
• Experience working in Linux environments.

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 and C++ interactions.
• Refactor legacy code into clean, maintainable, and high-performance solutions.
• Collaborate closely with architecture roles to continuously improve the system.

Skills

Node.js development

C++ debugging

Linux environments

Docker, Make, CMake

AI-assisted development

Performance optimization

English communication

Tools

Docker

Make

CMake

Job description

Arsys is seeking a passionate backend engineer to transform architectural specifications into robust, production-ready code in a hybrid Node.js–C++ system. You will leverage AI tools to maximize development speed while maintaining high quality.

You will build and optimize backend components, translate specs into functional solutions, and work in an international team with flexible hours. This role offers hybrid work in Alcobendas, Valencia, Barcelona, Sevilla, or Logroño and a challenging