Sr. Engineer, Falcon Secure Access (Hybrid, ISR)

The Falcon Secure Access (FSA) team at CrowdStrike is expanding. As a Senior Software Engineer on our team, you will architect and deliver a next-generation secure access platform that converges Zero Trust Network Access with browser-native security. You'll build the core systems that enable users to seamlessly and securely access internal sites, private applications, and cloud resources directly from the browser — without legacy VPNs or remote desktops — while enforcing real-time protection against zero-day exploits, phishing, data exfiltration, and unauthorized access. This role sits at the intersection of network engineering and browser security: you'll design and implement advanced proxy communication, secure tunneling, and identity-aware routing — all operating at the browser's core to deliver holistic protection including DLP, insider threat detection, SaaS security, and continuous zero-trust verification. What You'll Do: Design and build ZTNA infrastructure — implement zero-trust access policies, secure tunneling, and identity-aware network routing that replaces traditional VPN architectures Develop advanced networking solutions — build and optimize proxy communication layers, WebSocket-based transport, and encrypted client-to-server channels that handle millions of concurrent connections Architect high-scale backend systems — design distributed microservices for policy enforcement, real-time threat detection, and access control at scale using Node.js / TypeScript Implement secure client-server communication — design highly secured agent-to-cloud architectures with certificate pinning, mutual TLS, and encrypted tunneling protocols Build browser-native security components — develop browser extensions and agents (Chrome, Edge, Firefox etc.) that enforce data protection, prevent data leakage, and provide granular visibility and control Own features end-to-end — from design through delivery, including deployment and monitoring Influence architecture and roadmap — play a key role in architectural decisions, building toward an efficient distributed zero-trust architecture Collaborate cross-functionally — work with security researchers, product, and platform teams across multiple locations to solve complex problems What You'll Need: Strong networking fundamentals — deep understanding of communication protocols (TCP/IP, TLS, WebSockets, HTTP/2), proxy architectures, and tunneling mechanisms Proven backend expertise — experience designing and developing high-scale microservices in Node.js / TypeScript / Python / GO / C++ Hands-on experience with proxy and secure communication — WebSocket implementations, forward/reverse proxies, MITM inspection, and encrypted channel design Experience with client-agent development — building complex, efficient client-side agents with reliable server communication Cloud platform experience — AWS, GCP, or Azure, with understanding of on-premises and hybrid infrastructure