Senior Network Engineer, Infrastructure Services

Summary

Do you want to help build some of the largest and most consequential enterprise and customer technology systems in the world? Join Apple’s Information Systems and Technology (IS&T) organization.

IS&T is the engine behind everything Apple does for customers and for the people who build for them. It’s Apple’s central nervous system. Supporting 2.5 billion active Apple devices, processing billions of secure transactions, and keeping the technology that defines modern life running flawlessly, IS&T makes the impossible feel effortless.”

Do you love building solutions to handle global complexity and immense scale? Imagine what you could do here.

Infrastructure Services is part of IS&T and the foundation of Apple's global network operations — managing data center equipment and systems to deliver compute, storage, and networking services for teams across Apple, including its internal developer community. From individual facilities to a worldwide network, Infrastructure Services ensures the technology underneath everything works without question.

Apple’s Global Network Services (GNS) team supports Apple’s Global Backbone and Internet peering infrastructure! We're a team of seasoned professionals that maintain and operate one of the world’s largest service provider based backbone to connect all of Apple’s businesses globally. We are growing and building the fastest and most reliable network backbone to meet Apple’s phenomenal scale and unique requirements.

About the role

As a Senior Network Engineer, you will be responsible for the design, testing, and deployment of our global backbone network. The ideal candidate will thrive in a dynamic team environment, leading and executing large-scale network projects across all phases, including testing, design, planning, and deployment.

Additionally, this role requires hands-on experience in a lab environment to qualify network platforms and network operating systems (NOS). You will also develop custom automation tools to enhance test coverage, improve test case effectiveness, and streamline network validation processes.

Responsibilities

• Test Case Development and Scalability: Build, maintain, and enhance network test cases and test procedures that scale across diverse network environments, network roles, and vendor platforms.
• End-to-End Test Planning: Design end-to-end test scenarios and develop structured test plans to reproduce production issues, edge cases, degraded network conditions, and failure scenarios across the network infrastructure.
• Test Automation and Tooling: Identify repetitive manual workflows suitable for automation and develop tools and scripts for network device control, testbed setup, performance measurement, data collection, and automated test execution.
• Cross-Functional Collaboration: Partner with software engineers, network architects, deployment teams, and operations teams to understand network behavior, improve test coverage, identify validation gaps, and ensure network reliability.

Failure Emulation and Troubleshooting: Reproduce production network failures in controlled test environments, isolate issues, collect logs and telemetry data, and provide detailed reproduction procedures to support engineering investigations and root cause analysis.

• Test Coverage and Validation Improvements: Identify gaps in existing test suites and expand validation coverage for network functionality, reliability, resiliency, performance, and failure recovery.
• Issue Analysis and Documentation: Document test results, failure symptoms, reproduction steps, and diagnostic findings to help engineering teams troubleshoot issues and implement corrective actions.

Minimum Qualifications

• Solid understanding of. LAN/WAN technologies and protocols
• In-depth experience with TCP/IP, ISIS, BGP and MPLS protocols.
• Experience with systems, integration, validation and testing of complex hardware and software products.
• Proficient in building test cases for a different network platforms and NOS.
• Experience in testing network devices, related tools, dependent systems, Applications and dependent infrastructure.
• Extensive hands-on experience with carrier-grade network technologies and vendor including Cisco, Arista and Juniper.
• Experience supporting large-scale backbone network with knowledge of comple traffic engineering, traffic engineering and internet routing protocols.

Preferred Qualifications

• In-depth knowledge of Layer 2/Layer 3 networking protocols, including TCP/IP, IS-IS, BGP, and MPLS.
• Hands-on experience with multivendor network platforms.
• Experience qualifying network hardware and their respective network operating systems (NOS).
• Proficiency with network testing tools and traffic generators, such as Ixia and Spirent.