Network Engineer / Linux Administrator
RingCentral · Bulgaria · 10d ago
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
Fluency 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 ringcentral.com 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.
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