Arsys is a leading Spanish provider of cloud computing and web hosting services, managing over 1.5 million services for more than 260,000 clients. Founded in 1996, the company has established itself as a key player in the European digital infrastructure market, offering solutions ranging from domain registration to complex managed cloud environments. Headquartered in Logroño, Arsys maintains a strong presence across Spain with additional offices in Madrid and Barcelona. Since its acquisition by the United Internet Group (IONOS) in 2013, the company has integrated into a global network, making it an attractive destination for international tech talent seeking roles in system administration, software engineering, and cloud operations within a stable, established corporate environment.

Founded in 1996 in Logroño, Arsys became a pioneer in the Spanish internet market. In 2013, it was acquired by United Internet (IONOS), further expanding its reach and resources across Europe.

Specialist Software Engineer

Arsys

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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...

We are looking for an Specialist Full-Stack Execution for the Euro Office Performance Group (Server Development) team:

What we'd like to see

Backlog Eradication: Act as the primary high-volume executioner for features and bug fixes across the entire document suite. You clear the path for the Staff (L5) architects.
Cross-Pod Support: Support the Netcode, Rendering, and Bridge pods during high-intensity "Feature Sprints," acting as the flexible resource that unblocks any technical bottleneck.
Legacy Refactoring: Take "black box" legacy JavaScript modules and use AI-driven refactoring to convert them into clean, modular, and performance-optimized services.
Rapid Prototyping: Take architectural blueprints from the Staff Architects and build working "Vertical Slices" (End-to-End prototypes) in record time.
Documentation & Knowledge Mapping: Use AI to generate high-quality technical documentation for refactored legacy code, ensuring long-term maintainability.

Expectations

Being part of a multidisciplinary team passionate about technology, with an open and dynamic culture, where experimentation and discussion are encouraged to progress at work, always with respect and inclusion.
We offer personalised career plans, annual performance evaluations and programmes to develop skills.
We operate in Spanish and English and therefore provide unlimited language training. We work on international projects and define best practices with United Internet partners.
We have flexible start and finish times, respecting a schedule of meetings in the central part of the morning and a range of work from 7 a.m. to 9 p.m. with a hybrid model in one of our offices (Alcobendas, Barcelona or Logroño).

At Arsys we value diversity and welcome all applications regardless of, for example, gender, nationality, ethnic or social origin, religion, disability, age, as well as sexual orientation and identity, physical characteristics, marital status or any other irrelevant factor subject to applicable law.