Network Engineer / Linux Administrator

Say hello to opportunities. If you’re looking to be part of what’s next in communication, you’re in the right place. At RingCentral, we believe the best customer experiences happen when humans and AI work together. Our agentic voice AI portfolio—AIR, AVA, and ACE—brings together automation, assistance, and insights across the entire conversation lifecycle. The result? More seamless, intelligent experiences for businesses everywhere. With $2.5B+ in ARR and $250M invested in R&D annually, we’re building the future of AI-powered business communications. Currently we're looking for a network and infrastructure engineer to support EMEA IT network and infrastructure (mostly Linux-based), office interconnectivity, VPN solutions, and server room operations across our offices. This role requires on-site presence at our office 4 days a week to support effective collaboration and teamwork. WHO WE'RE LOOKING FOR An experienced, responsible engineer who stays calm under pressure and doesn't shy away from complex problems. Someone who keeps up with the industry, is genuinely curious about new technologies, and brings that curiosity into their daily work. A team player who contributes to shared goals, takes ownership of driving problems toward resolution and engages the right people when needed, and sees every incident through to full resolution - not just mitigation. WHAT YOU'LL DO Office network support - Maintain and support the network infrastructure of the office, its connectivity to other offices, and plan and build network infrastructure when offices expand. VPN support - Configure, maintain, and support VPN solutions for site-to-site connectivity and remote employee access. Linux infrastructure management - Own the Linux system lifecycle across office infrastructure: provisioning, configuration management, security hardening, and day-to-day troubleshooting. Maintain and support virtualisation and container host environments running on RHEL-based systems. Server room operations - Work hands-on in the server room: manage and maintain physical infrastructure including structured cabling (SCS), UPS systems, and rack equipment. Ensure physical layer reliability and documentation. Network upgrades and testing - Plan and execute network upgrades, perform testing to validate reliability and performance before and after changes. User support via service desk - Handle network-related requests and incidents within the company's service desk platform, providing timely resolution for end users. Monitoring and incident response - Oversee monitoring and alerting systems to detect and resolve incidents, identify potential issues proactively, and implement preventive measures. On-call duty - Participate in on-call rotation to ensure coverage for critical incidents outside regular business hours Collaboration - Work closely with NetOps team colleagues to jointly deliver network connectivity solutions, share knowledge, and drive incidents through to full resolution. Documentation - Maintain accurate and up-to-date documentation of network topology, configurations, procedures, and changes. Automation - Automate routine tasks using scripting, infrastructure-as-code tools, and AI-assisted tooling to reduce manual effort and improve consistency. Key requirements 3+ years of hands-on networking experience. Must Have Switching & routing Ethernet, 802.1q (VLAN tagging) xSTP (STP/RSTP/MSTP), LACP 802.1x (port-based network access control / NAC) OSPF, static routing VPN & tunneling IPsec: route-based and policy-based SSL VPN, OpenVPN - deployment and support Network services DHCP, DNS, NTP, NAT AAA: RADIUS, TACACS+, LDAP IPAM (IP Address Management) - maintaining and operating IP address space Firewall & perimeter security Stateful and NGFW: Fortinet, Juniper SRX or Cisco equivalent Host-based: iptables, firewalld Switching platforms Juniper EX or Cisco Catalyst - access/campus switching Experience with enterprise-grade switching platforms required Linux / Unix administration RHEL-based OS at advanced level - administration, troubleshooting, scripting Server infrastructure: bare metal, virtualisation (hypervisor), containers Monitoring Zabbix, Grafana - dashboards, alerting, threshold configuration Netflow / IPFIX / sFlow - traffic flow analysis ​AI Tools Familiarity with modern AI tools, with practical experience using them to improve efficiency and automate routine tasks Language F luency in English language Should Have Routing - advanced BGP: unicast, route reflection, policy, prefix filtering Security platforms Juniper SRX - hands-on configuration and troubleshooting preferred Cloud networking AWS networking: VPC, Transit Gateway, Security Groups, Route Tables Load balancing & DNS: AWS Route 53, HAProxy Wi-Fi 802.11 (a/b/g/n/ac/ax) - configuration and troubleshooting SD-WAN Understanding of SD-WAN concepts: centralised policy, underlay/overlay separation, application-aware routing Physical infrastructure Structured cabling (SCS) - installation, patching, documentation UPS systems - basic operation, monitoring, maintenance Rack and server room equipment handling Automation Scripting and automation: Bash, Python Infrastructure-as-code: Ansible / AWX, Terraform CI/CD: GitLab CI High availability & architecture HA design patterns, clustering Both greenfield and brownfield deployment experience Nice to Have MC-LAG / ESI LAG (multi-chassis link aggregation) BGP L3VPN MPLS (transport and services) SD-WAN platforms: Cato Networks, Zscaler Wi-Fi management platforms: Juniper Mist, Ruckus, Aruba MikroTik - RouterOS configuration and troubleshooting Logging and log management: ELK stack Cloud networking: Azure, GCP Networking in Kubernetes CCNA, JNCIA or equivalent certification What we offer : Well-coordinated professional team. Cutting edge technologies, interesting and challenging tasks, dynamic project, great opportunities for self-realization, professional and career growth. Additional Health and Life Insurance Package. Employee Assistance Program. 25 vacation days. 102,26 EUR/200 BGN Digital Food Vouchers via EdenRed and their application 61,36 EUR/120 BGN Gross as part of the salary for Working Expenses Allowance About RingCentral RingCentral is a global leader in agentic voice AI–powered business communications, delivering an integrated platform for business phone, SMS, contact center, workforce engagement management, video collaboration, and messaging. As the communications layer connecting businesses and customers, RingCentral is the front door of business communication and is in the advantageous position to apply AI at every phase of the conversation journey — before, during, and after each interaction. Our agentic AI portfolio includes autonomous voice-first AI agents that automate calls, assist in the moment, and analyze every interaction – enabling businesses to work smarter, respond faster, and connect more meaningfully with their customers. Visit to learn more. RingCentral is an equal opportunity employer that truly values diversity. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. #LI-JW1