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Summary: Seeking an execution-driven backend developer to build and optimize a hybrid Node.js–C++ system, leveraging AI tools for speed and quality. Highlights: 1. Develop robust Node.js backend components and high-performance C++ integrations 2. Utilize AI tools to accelerate development, validation, and code improvement 3. Engage in performance optimization and continuous system improvement #### **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
