Senior Network & Cloud Infrastructure Engineer

We are seeking a Senior Network & Cloud Infrastructure Engineer to design, implement, operate, and continuously improve highly available and secure network infrastructure supporting Visa's critical platforms and services.

This role requires deep hands-on expertise across cloud and enterprise networking, with responsibility for connectivity, routing, network security, troubleshooting, automation, and production operations. The engineer will work closely with SRE, Cloud, Security, Architecture, and application teams to deliver resilient network solutions and resolve complex production issues.

Key Responsibilities:

• Design, implement, and operate highly available network infrastructure across cloud and enterprise environments.
• Design and support AWS networking, including VPCs, Transit Gateway, Direct Connect, VPNs, routing, load balancing, DNS, and connectivity across multiple environments and regions.
• Configure and troubleshoot routing protocols, network segmentation, firewalls, VPNs, NAT, DNS, and load-balancing solutions.
• Support hybrid connectivity between cloud environments, data centers, partners, service providers, and external networks.
• Provide hands-on technical leadership for complex network incidents, troubleshooting connectivity, routing, latency, packet loss, and performance issues.
• Design network solutions with resilience, redundancy, scalability, security, and disaster recovery requirements in mind.
• Implement network infrastructure and configuration through automation and Infrastructure as Code, reducing manual operational activities.
• Build and improve network monitoring, observability, alerting, and capacity management.
• Collaborate with Security, Cloud, SRE, Architecture, application teams, vendors, and telecommunications providers on network designs and implementations.
• Support network changes, maintenance activities, incident response, problem management, and root cause analysis.
• Create and maintain technical documentation, operational procedures, network diagrams, and troubleshooting guides.
• Participate in an on-call rotation supporting critical production environments.

Qualifications:

• Strong hands-on experience designing, implementing, and troubleshooting large-scale enterprise and cloud networks.
• Strong knowledge of TCP/IP, BGP, routing, switching, DNS, NAT, VPN, network segmentation, and load balancing.
• Hands-on experience with AWS networking services such as VPC, Transit Gateway, Direct Connect, Route 53, Elastic Load Balancing, and site-to-site VPN.
• Experience with enterprise firewall platforms and network security concepts.
• Experience with hybrid cloud and data center connectivity.
• Experience troubleshooting complex network issues using tools such as packet captures, flow logs, network telemetry, and traffic analysis.
• Experience with network monitoring and observability solutions.
• Experience automating network infrastructure using Infrastructure as Code and scripting, such as Terraform, Ansible, Python, or similar technologies.
• Experience operating highly available, business-critical production environments.
• Experience with incident management, root cause analysis, change management, and production support.
• Strong collaboration skills and experience working across infrastructure, cloud, security, architecture, and application teams.