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 a Staff Network Engineer to lead our VMware Software-Defined Networking (SDN) strategy. In this role, you will design scalable private cloud networks, automate workflows, and collaborate with engineering, security, and product teams in a supportive, work-life-balanced environment. KEY RESPONSIBILITIES * Architecture: Design scalable private cloud networks using VMware Cloud Foundation (VCF) and NSX. * Collaboration: Work with DevOps, SysAdmins, and Product Owners to define technical standards. * Automation: Modernize network provisioning using modern automation tools. * Technical Leadership: Create High-Level (HLD) and Low-Level Designs (LLD) for major networking projects. * Mentorship: Guide and mentor junior engineers while fostering a positive team culture. * Governance: Set operational standards (SOPs) and participate in architecture review boards. WHAT WE LOOK FOR TECHNICAL SKILLS * Experience: 8+ years in network engineering, focusing on VMware SDDC environments. * VMware Stack: Strong experience with VCF and NSX / NSX-T. * Core Networking: Deep knowledge of BGP, VXLAN, Geneve, micro-segmentation, and multi-tenancy. * Automation: Hands-on experience with Python, Terraform, Ansible, NetBox, or VMware APIs in CI/CD pipelines. * Cloud & Hybrid: Experience connecting private clouds to public clouds (AWS, Azure, GCP) or on-prem networks. * Modern Tech: Basic familiarity with Kubernetes CNI, Tanzu, or NSX ALB (Avi Networks). SOFT SKILLS * Strong mentorship and team-building skills. * Ability to explain complex technical ideas clearly to non-technical partners. * Growth mindset and adaptability to new technologies. LANGUAGES * English: C1 (Fluent) * Spanish / German: Nice to have, but not required. 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, Valencia, Barcelona, Seville 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.