Lead Endpoint Engineer - Windows

About Nightfall: Nightfall is the AI-native, unified data loss prevention and insider risk management platform that protects sensitive data across SaaS apps, GenAI tools, email, endpoint devices, and more. Hundreds of customers, spanning AI innovators to top 10 banks, trust Nightfall to detect and stop data exfiltration at scale. Nightfall enables organizations to innovate freely without the risks of losing intellectual property or exposing customer data. Our agentic platform helps security teams regain their time by putting data loss prevention on autopilot. With automatic remediation, security violations can be resolved automatically before they become incidents, and end-users can be automatically trained and coached in the moment to self-heal violations that they introduce. Nightfall is backed by leading VC firms including Bain Capital Ventures (Enrique Salem - former CEO of Symantec), Venrock (early investors in Cloudflare), WestBridge Capital, Pear VC (early investors in Dropbox and Doordash), and a cadre of cybersecurity leaders including Frederic Kerrest (founder of Okta), Maynard Webb (former COO of eBay), Ryan Carlson (President of Chainguard), Kevin Mandia (founder of Mandiant), and many others. About the role: As an endpoint engineer in the team you will own data exfiltration prevention on endpoints and requires background in Windows Platform. Engineers in this team own the design and development of core features on Nightfall’s Data Exfiltration platform. This requires leveraging file & device interfaces and requires in-depth understanding of Operating System internals. Responsibilities Designing and developing data exfiltration prevention apps, drivers, system extensions and services on Windows. Maintaining and evolving mission-critical agents on endpoints. Own complex features from design to delivery and troubleshoot issues from customers. Designing and building secure software with cross-platform deliverables (Windows) Writing and maintaining documentation about internal and public services. Requirements Expertise in one of the following: C/C++ on Windows. Demonstrable expertise in developing agents on Windows. On Windows, practical development experience with WDF (Windows Driver Frameworks), filter drivers and familiarity with user mode apps is required. Readiness to learn other systems languages (e.g. Rust, Go, Python). Prior experience in one of these languages is a definite plus. Experience with kernel-level debugging processes and tools. Ability to use reverse engineering techniques and debugging of kernel space code. Ability to decompose complex business problems and own them end to end across teams. Minimum 10+ years of related work experience. Environment Nightfall AI takes pride in being an equal-opportunity employer. We value a diverse and global talent pool and the collaboration that results from having a diverse and inclusive team. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status. Our hiring decisions are based exclusively on merit, qualifications, and business needs. Compensation Employee compensation will be determined based on interview performance, level of experience, specialization of skills, and market rate. During the offer discussion, your recruiter will review the finalized base salary, bonus (for applicable roles), benefits & perks, and stock options as they’ll be reflected in the offer letter.