Mastercard is looking for a Lead Network Engineer for our Site Reliability Engineering (SRE) team. You will be responsible for the reliability, performance, and strategic evolution of the core infrastructure and networks that power Mastercard's critical applications. In this role, you'll ensure availability, scalability, and resilience while driving automation and continuous improvement.
What You'll Do
- Lead continuous assessments of network infrastructure supporting critical Mastercard applications, focusing on health, performance, and capacity analysis.
- Collaborate with Product and Development teams to forecast growth requirements and ensure scalability.
- Lead regular incident reviews with internal support teams to ensure root causes are identified and develop strategies to remediate risks.
- Champion observability by assessing environments for gaps in monitoring and alerting, and design strategies to integrate infrastructure telemetry into a unified view.
- Leverage automation and AI technologies to enhance proactive issue detection and enable self-healing capabilities.
- Develop testing and validation plans for new environment builds, disaster recovery exercises, and post-maintenance activities.
- Champion continuous learning, development, and knowledge sharing across networking and other infrastructure disciplines.
- Evaluate vendor hardware, firmware, and software upgrade roadmaps and conduct proof-of-concept testing.
- Perform periodic on-call responsibilities for critical core payment systems.
What We're Looking For
- 5–10 years of experience in Network Engineering within operations or design.
- At least 3 years supporting e-commerce, financial services, or large-scale SaaS platforms.
- Expert-level understanding of TCP/IP networking, including LAN and WAN architectures.
- Advanced proficiency or formal certifications in Cisco, Arista, and/or Check Point network platforms.
- Strong knowledge of HTTP, DNS, and TLS protocols, with the ability to troubleshoot at the application and transport layers.
- Solid Linux fundamentals, including networking, system configuration, and troubleshooting.
- Deep understanding of load balancing concepts and traffic management strategies.
- Hands-on experience with automation and IaC tools such as Ansible and Terraform, as well as structured data formats (JSON/YAML).
- Proficient in packet-level debugging, including capturing traffic with tools like tcpdump and analyzing packets using tools such as Wireshark.
- Excellent communication skills with a proven ability to coordinate complex troubleshooting efforts and lead root cause analysis (RCA) activities.
Nice to Have
- Experience with private MPLS networks and SD WAN technologies.
- Familiarity with Content Delivery Networks (CDNs) and DDoS protection services.
- Experience with Application Performance Monitoring (APM) tools such as Dynatrace or Datadog, and familiarity with the OpenTelemetry observability framework.
- Familiarity with Network telemetry tools such as Solarwinds & Netscout.
Technical Stack
- Networking: Cisco, Arista, Check Point, TCP/IP, LAN/WAN, MPLS, SD WAN, HTTP, DNS, TLS
- Systems: Linux
- Automation & IaC: Ansible, Terraform, JSON/YAML
- Monitoring & Observability: Dynatrace, Datadog, OpenTelemetry, tcpdump, Wireshark, Solarwinds, Netscout
Team & Environment
You will join the Payments Network SRE team within Mastercard’s Program aligned Site Reliability Engineering organization.
Mastercard is committed to building an inclusive, digital economy that benefits everyone, everywhere. Through secure data, trusted networks, strong partnerships, and relentless innovation, we help individuals, financial institutions, governments, and businesses unlock their greatest potential.
