Endpoint Engineer (MacOS & Windows)

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.

As an Endpoint Engineer at Nightfall, you’ll enable us to deliver features on a cutting edge AI Native endpoint product while maintaining reliability and security.

This is a role in the team that owns data exfiltration prevention on endpoints and requires background in one of the following platforms: MacOS or Windows.

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  Designing and developing data exfiltration prevention apps, drivers, system extensions and services on MacOS or Windows.

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  Maintaining and evolving mission-critical agents on endpoints.

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  Own complex features from design to delivery and troubleshoot issues from customers.

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  Designing and building secure software with cross-platform deliverables (Windows, MacOS).

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  Writing and maintaining documentation about internal and public services.

• Expertise in one of the following: Objective-C, Swift on MacOS or C/C++ on Windows.

• Demonstrable expertise in developing agents on one of MacOS or Windows.

  • On MacOS, practical development experience with Endpoint Security System Extension is required. A plus will be knowledge of IOKit and of MacOS VFS model.

  • 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 5+ years of related work experience.

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.