macOS Agent Engineer

What we do: Halcyon is the industry’s first dedicated, adaptive security platform that combines multiple proprietary advanced prevention engines along with AI models focused specifically on stopping ransomware.

Who we are: Halcyon was formed in 2021 by a team of cyber industry veterans after battling the scourge of ransomware (and advanced threats) for years at some of the largest global security vendors. Comprised of leaders from Cylance (now Blackberry), Accuvant (now Optiv), Fireye and ISS X-Force (now IBM), Halcyon is focused on building products and solutions for mid-market and enterprise customers.

As a remote-native, completely distributed global team, we recognize great talent can exist anywhere. We invite you to apply to a job you’re interested in and we'll work a plan to meet your needs.

Halcyon’s goal is to deliver an anti-ransomware solution that breaks new ground in what a security product can achieve. Aligned with this vision, we are seeking an experienced engineer to contribute to the development of our macOS agent. This agent combines macOS extensions with a user-level service written in Rust, C++, and Swift. By expanding platform support, we are ensuring our customers are further protected from ransomware threats. If you’re passionate about macOS security and want to make a real difference, we’d love to hear from you.

• Develop macOS-specific Security Extensions: Using Network Extensions and the Endpoint Security Framework.

• Design Agent Functionality for macOS: Handle packaging, installation, secure updates, and system integration for endpoint agents.

• Cross-Platform Code Contribution: Work with multi-platform logic in Rust for a user-level service alongside macOS-specific code.

• Debugging & Optimization: Use logs, debuggers, and profiling tools to analyze performance and correct behavior.

• Test & Maintain Code Quality: Write unit and integration tests, adhering to consistent coding style and architecture.

• Team Collaboration: Communicate effectively across teams to ensure interoperability with other components and alignment with architectural goals.

• Ability to develop high-quality code in Swift and C++

• Experience with macOS extensions in an endpoint security product (e.g., EndpointSecurity, NetworkExtensions)

• Experience developing and shipping production software for macOS

• Familiarity with SQL

• Experience developing in Rust and handling interoperability between Rust and Swift

• Experience distributing macOS applications using .pkg and .dmg

• Knowledge and experience with Rust crates such as threading, async, and Tokio

• Experience working with SQL

Halcyon offers the following benefits to eligible employees:

• Comprehensive healthcare (medical, dental, and vision) with premiums paid in full for employees and dependents.

• 401k plan with a generous employer contribution.

• Short and long-term disability coverage, basic life and AD&D insurance plans.

• Medical and dependent care FSA options.

• Flexible PTO policy.

• Parental leave.

• Generous equity offering.

The Company reserves the right to modify or change these benefits programs at any time, with or without notice.​

Base Salary Range: $180,000 - $240,000

Bonus Range: 10%

In accordance with applicable state and federal laws, the range provided is Halcyon’s reasonable estimate of the base compensation for this role. The actual amount may differ based on non-discriminatory factors such as experience, knowledge, skills, abilities, and location. Base pay is one part of the total package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives, and equity in the Company.

We understand it takes a diverse team of highly intelligent, passionate, curious, and creative people to develop the exceptional product we are building. Our dynamic team has incredible perspectives to share, just as we know you do, and we take great pride in being an equal opportunity employer.