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Network EngineerRzr Co • San Francisco, California, United States
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Network Engineer

Rzr Co
  • US
    San Francisco, California, United States
  • US
    San Francisco, California, United States
Apply Now

About

Overview RZR is an AI-native advertising platform built for the next era of performance marketing. We operate at the intersection of machine learning, programmatic media, and full-funnel mobile growth, powering campaigns for some of the world's most ambitious advertisers. Our platform is purpose-built to deliver outcomes at scale, not just impressions.
We are a team of builders, operators, and technologists who believe the advertising industry is overdue for a fundamental rethink. We move fast, operate with a high degree of ownership, and hold ourselves to an exceptionally high standard of craft.
RZR is scaling aggressively with an active M&A pipeline and a platform vision that puts us on a path to becoming an industry leader. This is a rare opportunity to join a company at an inflection point and help shape what it becomes.
Role Overview We are looking for a skilled Network Engineer to join our San Francisco engineering hub. In this role, you will own the design, implementation, and day-to-day management of the high-performance network infrastructure that powers our programmatic Demand-Side Platform — a real-time bidding environment where milliseconds matter and reliability is non-negotiable.
You will work hands-on with modern open networking technologies — including Mellanox Spectrum hardware, Cumulus Linux, and Netris — to build and maintain a low-latency, highly automated data center fabric. You will collaborate closely with global infrastructure and backend engineering teams to deliver a network environment that scales with the business.
Key Responsibilities
Network Infrastructure: Design, deploy, and maintain high-density data center networks utilizing Mellanox switches and adapters.
Network OS Management: Administer and optimize network nodes running Cumulus Linux, ensuring stable and high-performance routing and switching.
Software-Defined Networking: Manage and orchestrate network operations using Netris for automated, controller-based networking.
Performance Optimization: Monitor and tune network performance for real-time systems, with a focus on throughput and latency.
Security & Compliance: Implement and manage firewall rules, VPNs, and access control lists (ACLs) to protect infrastructure and data assets.
Automation & Scripting: Develop automation workflows to eliminate manual configuration, improve consistency, and accelerate deployment cycles.
Required Skills And Experience
3+ years of professional network engineering experience (6+ years for Senior-level consideration).
Deep familiarity with Mellanox Spectrum switches and ConnectX adapters.
Strong proficiency in Cumulus Linux (Debian-based) and general Linux system administration.
Hands-on experience with Netris for VPC-style networking on-premises or in hybrid cloud environments.
Expert-level knowledge of BGP, OSPF, EVPN-VXLAN, and LACP.
Proficiency in Python or Go for network automation.
Bachelor's or Master's degree in Computer Science, Engineering, or a related technical field.
Why Join RZR ?
Own the core US data center network infrastructure — this is a high-ownership, high-visibility role, not a support function.
Work daily with best-in-class open networking hardware and software: Mellanox Spectrum, Cumulus Linux, and Netris in a live production environment.
Directly shape the backbone of a programmatic platform processing billions of real-time bid requests, where your engineering decisions have immediate, measurable impact.
Join a small, senior infrastructure team where ideas get implemented — not committee'd to death.
Be part of a company scaling aggressively, with the scope and trajectory to grow into a broader infrastructure leadership role.
RZR Behaviors RZR operates by eight core behaviors: Extreme Ownership
Move Fast
Drive for Excellence
Proactive Communication
Courage
Curiosity
Deliver Results
Manage Ambiguity
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  • San Francisco, California, United States

Languages

  • English
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