Senior Network Engineer (Data Center/Cloud)
First seen by Alion on Nov 10, 2026.
We are looking for a Network Infrastructure Engineer to join our fintech product team and take ownership of network infrastructure in a production trading environment.
You’ll work with data center and cloud connectivity, network security, high availability, and automation, helping keep critical systems stable and well connected.
This role would suit someone who is comfortable working with complex infrastructure, troubleshooting production issues, and making practical improvements to network reliability.
Responsibilities
Administer and develop network infrastructure based on Cisco Nexus.
Configure and maintain VLAN, LACP, vPC, routing, BGP, and VPN ендпоінтс.
Work with Palo Alto Networks, including firewall policies, NAT, routing, Site-to-Site VPN, and troubleshooting.
Build and maintain connectivity between data centers, providers, and partners.
Organize cross-connects in data centers and coordinate with providers and remote hands.
Configure and maintain AWS Direct Connect and Azure ExpressRoute / VPN connectivity.
Troubleshoot network issues in production environments, including latency, packet loss, routing, firewall, VPN, and physical connectivity issues.
Support network connectivity for Windows and Linux servers.
Monitor the availability and health of network infrastructure.
Document, standardize, and automate network equipment configuration using Ansible.
Manage cloud network infrastructure using Terraform / Infrastructure as Code.
Participate in designing and maintaining fault-tolerant and highly available network architecture.
Requirements
5+ years of experience in Network Infrastructure Engineering role.
Strong knowledge of TCP/IP, VLAN, STP, LACP, NAT, ACL, DNS, and routing.
Hands-on experience with BGP.
Experience with Git and CI/CD practices for Infrastructure as Code.
Experience administering Cisco network equipment, preferably Cisco Nexus.
Hands-on experience with Palo Alto Networks or similar enterprise firewalls.
Experience configuring and troubleshooting IPsec Site-to-Site VPNs.
Understanding of Data Center networking and cross-connect connectivity.
Practical understanding of networking in AWS and/or Azure.
Experience using Ansible for network infrastructure configuration and automation.
Experience using Terraform.
Systematic approach to troubleshooting and experience handling production incidents.
Experience with network monitoring and logging tools such as SNMP, Syslog, Grafana, Zabbix, or similar solutions.
English proficiency at B1+ (sufficient for working with technical documentation and communicating with international providers).
Nice to Have:
Experience with AWS Direct Connect / Azure ExpressRoute.
CCNA, CCNP, or Palo Alto certifications.
Experience with Python or PowerShell.
Experience working in FinTech, Trading, or other high-availability environments.
Experience with VXLAN/EVPN and advanced Cisco Nexus networking.
What we offer:
20 paid vacation days per year
10 paid sick leave days per year
Public holidays as per the company’s approved Public holiday list
Medical insurance
Opportunity to work remotely
Professional education budget
Language learning budget
Wellness budget (gym membership, sports gear and related expenses)