Senior Cloud Infrastructure Engineer (AWS & Networking)

We’re looking for a Senior Cloud Infrastructure
Engineer who is strong in enterprise networking and
passionate about cloud migration and AWS. This is a hands-on senior
role where you’ll help lead the evolution of our hybrid on-prem + AWS
infrastructure, supporting critical healthcare systems in a HIPAA-regulated
environment. If you enjoy owning infrastructure design, solving complex
network challenges, and modernizing platforms in the cloud — this role is for
you.

What You’ll Work On

Cloud & AWS (Core Focus)

• Design, deploy,
  and operate AWS infrastructure with an emphasis on networking,
  security, and reliability
  
• Lead and
  support application and infrastructure migrations from
  on-prem to AWS (lift-and-shift, re-platforming, hybrid)
  
• Architect and
  manage AWS networking:
  
• VPCs, subnets,
  routing
  
• Security
  Groups, NACLs
  
• Site-to-site
  VPN, client VPN, Direct Connect (as applicable)
  
• Ensure AWS
  environments meet HIPAA, security, availability, and DR
  requirements
  
• Partner with
  application and platform teams on cloud modernization
  
• Support
  Infrastructure as Code (Terraform / CloudFormation experience preferred)
  

Enterprise Networking

• Design,
  implement, and support enterprise network infrastructure:
  
• Layer 2 /
  Layer 3 switching and routing
  
• Firewalls,
  VPNs, wireless, WAN
  
• Own network
  security posture using industry best practices
  
• Troubleshoot
  complex connectivity and performance issues across on-prem and cloud
  
• Optimize
  network performance for:
  
• VoIP and
  collaboration tools
  
• Real-time and
  latency-sensitive applications
  
• Multi-site and
  SD-WAN environments
  
• Lead network
  upgrades, enhancements, and capacity planning
  

Reliability, Operations & Automation

• Maintain high
  availability, performance, and security across hybrid infrastructure
  
• Manage
  patching, upgrades, backups, and restores
  
• Participate in
  disaster recovery planning and testing
  
• Improve
  automation and repeatability of infrastructure deployments
  
• Participate in
  a rotating on-call schedule
  
• Act as an
  escalation point during major incidents
  

Leadership & Collaboration

• Mentor and
  guide junior engineers
  
• Lead root cause
  analysis and drive long-term fixes
  
• Collaborate
  with Systems, Database, Security, and Application teams
  
• Create and maintain clear
  technical documentation and runbook
  

Requirements

Experience

• 5+ years in
  enterprise network or infrastructure engineering roles
  
• 3+ years
  hands-on experience with AWS in production environments
  
• Proven
  experience supporting hybrid on-prem + cloud architectures
  
• Experience in
  environments with:
  
• Multiple data
  centers
  
• 20+ sites
  
• 1,000+
  endpoints
  
• Experience with
  SD-WAN technologies
  
• Strong
  background in disaster recovery and business continuity
  

Technical Skills

• Strong Layer 3
  networking fundamentals (TCP/IP, routing, firewalls, VPNs)
  
• Hands-on
  experience with Palo Alto firewalls
  
• Cisco
  enterprise networking experience (routing, switching, collaboration)
  
• Solid
  understanding of DNS, TLS/SSL, HTTP/S, and identity-related protocols
  
• VMware
  virtualization experience
  
• Experience in
  healthcare or other regulated environments (HIPAA preferred)
  
• Epic or
  healthcare platform experience is a plus
  

Nice to Have

• AWS Certified
  Solutions Architect (Associate or Professional)
  
• CCNP or
  equivalent networking certification
  
• Cantonese or
  Mandarin language skills