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Menlo Security is seeking a Principal Software Engineer I for the R&D Policy Team. This team owns the full lifecycle of Menlo’s cybersecurity policy platform — the engine that defines how the product protects enterprise customers from web-based threats. That spans policy storage and management (authoring, versioning, and serving the rules that govern customer security posture), policy distribution (propagating policy changes reliably and at scale to enforcement points globally), and real-time enforcement (applying policies at traffic inspection time to block, isolate, or allow web activity). You will architect critical services across this stack, lead cross‑functional initiatives, and help shape how the team builds software in an era where AI is a first‑class engineering tool.