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

We offer you the opportunity to join the leading Spanish company in the IT sector, with more than 25 years of experience and one of the most solid track records as a provider of technological solutions for companies.

We are a growing company with more than 400 employees and offices in Logroño, Madrid, Barcelona, Seville, Bilbao and Valencia.

Since August 2013, we have been part of the IONOS Group, Europe's leading digitalisation 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...

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