arsys EN · Avenida de las Cortes Valencianas 58, 46015 Valencia · posted 10/13/2026

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 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" (Endto-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.

Specialist Software Engineer (f/m/d) (EN)

similar openings