Job DescriptionWe'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 OnCloud & 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
RequirementsExperience- 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
