Security Engineer, Network Security

CoreWeave is the AI Hyperscaler™, delivering a cloud platform of cutting edge services powering the next wave of AI. Our technology provides enterprises and leading AI labs with the most performant, efficient and resilient solutions for accelerated computing. Since 2017, CoreWeave has operated a growing footprint of data centers covering every region of the US and across Europe. CoreWeave was ranked as one of the TIME100 most influential companies of 2024.

As the leader in the industry, we thrive in an environment where adaptability and resilience are key. Our culture offers career-defining opportunities for those who excel amid change and challenge. If you’re someone who thrives in a dynamic environment, enjoys solving complex problems, and is eager to make a significant impact, CoreWeave is the place for you. Join us, and be part of a team solving some of the most exciting challenges in the industry.  

CoreWeave powers the creation and delivery of the intelligence that drives innovation. 

Role Overview

CoreWeave is seeking an experienced Senior Network Security Engineer to lead our edge security initiatives and protect our rapidly scaling cloud infrastructure. In this role, you will architect and implement cutting-edge security solutions focused on edge security at our network perimeter. You will work in a high-scale environment (CoreWeave is positioning itself as the next major hyperscaler) and ensure our network and services remain secure, resilient, and trustworthy. The ideal candidate is a seasoned security expert (5–10 years experience) with a deep understanding of modern cloud/network architectures and a passion for mentoring others in a security-first culture.

Key Responsibilities

• Edge Security Architecture: Design and deploy robust security measures at the network edge (e.g., perimeter firewalls, proxies, WAFs, CDN security) to protect CoreWeave’s globally distributed infrastructure. Ensure that all entry points and services are fortified against unauthorized access and attacks.
• DDoS Mitigation: Develop and implement advanced DDoS mitigation strategies to safeguard our platforms and ensure high availability. Continuously monitor traffic patterns, tune defenses (e.g., anti-DDoS services, rate-limiting, traffic filtering), and respond swiftly to volumetric attacks or anomalous traffic.
• Zero Trust Implementation: Champion a Zero Trust security model across CoreWeave’s network and cloud environment. Architect solutions that enforce least-privilege access, continuous verification, and micro-segmentation of services – ensuring no implicit trust at any layer.
• Security Monitoring & Incident Response: Establish robust monitoring for network security events and potential breaches. Proactively identify vulnerabilities or indicators of compromise, and coordinate incident response efforts for any network or edge-related security incidents to minimize impact.
• Cross-Functional Collaboration: Work closely with Networking, Infrastructure, SRE/DevOps, and Software Engineering teams to integrate security best practices into architecture, deployments, and processes. Provide expert guidance during design and code reviews to ensure new services and features are secure by design.
• Leadership & Mentorship: Drive security initiatives and foster a security-first mindset across the organization. Mentor junior engineers and peer teams on network security principles, conduct security training sessions, and lead by example in following and enforcing security policies and standards.
• Policy Development: Develop, implement, and continually refine security policies and standard operating procedures for a highly scalable, distributed environment. Regularly review network and cloud security postures, ensuring compliance with industry best practices and adapting policies as the company grows.

Required Qualifications

• Experience: 5–10 years of hands-on experience in network security engineering, with exposure to large-scale cloud or hyperscaler environments. Proven track record protecting complex, distributed systems at scale.
• Edge Security Expertise: Deep understanding of edge security principles and technologies – including experience mitigating DDoS attacks, defending against web exploits, and implementing zero trust methodologies.
• Cloud & Network Architecture: Strong conceptual and practical knowledge of securing modern cloud and network architectures. Proficient in network protocols (TCP/IP, DNS, BGP, HTTP/S, etc.), network segmentation, VPNs, and firewall configurations. Experience securing cloud platforms (AWS,