Network Development Engineer – Core & Backbone Teams

Role: Network Development Engineer – Core & Backbone Teams (All Levels)
Location: Palo Alto, Atlanta, Hillsboro (US) or Dublin (EU)
US Salary Range: $108,000 to $259,000 + Equity

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Who We Are:

X serves our community of users and customers by working tirelessly to preserve free expression and choice, enable limitless interactivity, and build a marketplace that drives the economic success of all its participants.

X is looking for talented Network Development Engineers to join its Core & Backbone Networking teams, bringing deep expertise in building and operating global infrastructure—from hyperscale data centers to a highly connected edge. You’ll help develop world-class network products that power X’s worldwide reach.

Who You Are:

You take pride in designing and building highly scalable, resilient, and performant infrastructure—and in rigorously testing every layer of it. Whether deploying networks that support 100K+ servers or architecting global backbone and edge solutions, you bring strong technical leadership, deep systems thinking, and a passion for clean design.

You’re at your best in collaborative environments, thrive on cross-functional problem-solving, and are comfortable owning critical decisions. You communicate clearly, operate with high ownership, and bring energy to multi-disciplinary technical teams.

What You’ll Do:

• Design, scale, and manage datacenter and backbone network infrastructure

• Lead architecture reviews and contribute to evolving network design

• Deploy and optimize a global multi-vendor, multiprotocol environment

• Perform qualification and validation of hardware and software

• Build fault-tolerant systems via proactive monitoring and anomaly detection

• Drive incident resolution and participate in a 12×7 on-call rotation

• Correlate network events, diagnose root causes, and implement long-term fixes

• Develop operational procedures and resilient remediation strategies

• Advance automation frameworks to accelerate deployment and reduce risk

Qualifications:

• B.S. in network engineering or a related technical discipline, or equivalent experience

• Expert-level knowledge of large-scale networking including platforms, topologies, and protocols like BGP, OSPF, or IS-IS

• Proven track record in solving complex networking challenges and driving cross-team execution

• Deep understanding of data center networking at scale, including Clos fabrics and BGP-based designs

• Hands-on experience with backbone, edge, and application-layer networking

• Proficiency with Unix/Linux environments and scripting (Python preferred)

• Hunger to learn new networking protocols, vendor systems, and languages as needed