Sr Infrastructure Engineer I

American Express•Phoenix, AZ

About The Position

Joining Amex Tech means discovering and shaping your contribution to something big. Here, you can work alongside talented tech teams and build a unique career with the Powerful Backing of American Express. With a range of opportunities to work with the latest technologies, and a commitment to back the broader engineering community through open source, our mission is to power your success. Because Amex Tech is powered by our technology, our culture, and our colleagues. We are seeking a versatile and highly skilled Full Stack Infrastructure Engineer with expertise in Compute, Storage, Network and Cloud technologies. The ideal candidate will design, implement, and manage robust infrastructure solutions, ensuring reliability, scalability, and performance.

Requirements

Bachelor’s degree in Computer Science, Information Technology, Engineering, and/or comparable experience; advanced degree preferred
Proven experience managing and optimizing a diverse infrastructure stack.
Extensive knowledge of cloud platforms (AWS, Azure, GCP) and infrastructure as code (Terraform, CloudFormation).
Familiarity of service mesh technologies (Istio, Linkerd).
Solid understanding of virtualization (VMware, Hyper-V) and containerization (Docker, Kubernetes) and orchestration.
Understanding of storage solutions (SAN, NAS, cloud storage) and backup systems.
Strong understanding of network protocols, routing, switching, and firewalls.
Experience with load balancers (F5, HAProxy, Nginx) and network monitoring tools.
Experience in DNS management and troubleshooting.
Experience in network security best practices.
Proficiency in monitoring and observability tools (Prometheus, Grafana, Splunk).
Proficiency in at least one scripting language (Python, Bash) for automation.
Experience with CI/CD pipeline management and DevOps practices.
Strong understanding of disaster recovery and business continuity planning.
Experience with performance tuning and capacity planning.
Understanding of chaos engineering principles and practices.
Skills in cost optimization for cloud infrastructure.
Experience in using cloud native monitoring tools like AWS CloudWatch, Azure Monitor, and Google Cloud Operations Suite.
Experience with packet capture tools like Wireshark for troubleshooting network issues.
Experience in using traceroute utilities and performance analysis tools like perf for identifying and resolving bottlenecks.
Familiarity with tools like ipconfig/ifconfig for viewing network configurations, flushing DNS, and diagnosing network issues.
Experience with SNMP-based tools for network device monitoring and performance management.
Experience in using NetFlow for network traffic analysis.
Experience with tools like iostat, vmstat, and dstat for monitoring storage and system performance.
Experience in tools like df, du, lsblk, and fdisk for managing and troubleshooting file systems and disk partitions.
Familiarity with tools like Prometheus and Grafana for monitoring and observability.
Employment eligibility to work with American Express in the United States is required as the company will not pursue visa sponsorship for these positions.

Responsibilities

Ensure the reliability, availability, and performance of the entire infrastructure stack including compute, storage, network and cloud components.
Lead incident response efforts across the infrastructure stack, coordinating with Application Support, SRE, and Engineering teams to minimize MTTD and MTTR.
Perform root cause analysis for infrastructure related incidents and implement corrective actions.
Develop and maintain automation tools for managing infrastructure resources.
Collaborate with Engineering teams to plan and execute system upgrades and maintenance.
Conduct capacity planning and resource management for all infrastructure components.
Participate in on-call rotations to provide 24x7 support for all critical infrastructure issues.
Design and implement disaster recovery plans and business continuity strategies.
Implement best practices for monitoring, logging, and alerting across the infrastructure.
Foster a culture of continuous improvement and operational excellence.
Analyze complex infrastructure problems, design scalable and resilient solutions, and lead the implementation of these solutions.
Collaborate with architects and other engineers to design and enhance the architecture of infrastructure systems, ensuring alignment with business needs and technology standards.