Arsys

Cloud hosting and ICT services provider

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

Backend EngineeringConfirmed live in the last 24 hours

Full-timeNo salary listed

About the Job

Requirements

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, including Docker, Make, and CMake.
Hands-on experience with AI-assisted development tools such as Cursor, Claude, or similar.
Ability to use AI as a productivity multiplier in software development.
Experience with iterative development, testing, and validation workflows.
Strong English communication skills for working in an international team.
Strong focus on quality and results.
Comfort working in fast-paced environments.
Strong interest in performance optimization and continuous improvement.

Responsibilities

Develop backend components in Node.js and high-performance integrations with C++.
Translate technical specifications into functional solutions 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 using Docker, Make, and CMake.
Analyze system performance and identify bottlenecks, especially in Node.js-to-C++ interactions.
Refactor legacy code into clean, maintainable, high-performance solutions.
Collaborate closely with architecture roles to continuously improve the system.

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

About the Company

Arsys

Cloud hosting and ICT services provider

Arsys provides ICT infrastructure and internet services to over 250,000 customers, including domain registration, email, website builders, e-commerce tools, hosting (managed hosting, VPS, dedicated servers), and scalable cloud infrastructure (IaaS) with public, private, and hybrid options. Its data centers in Spain and cloud nodes in the US, UK, and Germany are backed by certifications such as Tier III and ISO standards, and have run on 100% renewable energy since 2015. As part of the IONOS Group, Arsys offers tailored cloud projects, managed security, and support for Kubernetes to serve a wide range of customers from individuals to SMEs and larger enterprises. Its goal is to help small and medium-sized businesses digitally transform by providing end-to-end ICT infrastructure and cloud services with reliable performance and strong security.

Company size: 201-500
Company stage: Grant
Total funding: $130K
Headquarters: Logroño, Spain
Founded: 1996

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