Staff Software Engineer

Kaseya is the leading provider of complete IT infrastructure and security management solutions for Managed Service Providers (MSPs) and internal IT organizations worldwide powered by AI. Kaseya's best-in-breed technologies allow organizations to efficiently manage and secure IT to drive sustained business success. Kaseya has achieved sustained, strong double-digit growth over the past several years and is backed by Insight Venture Partners ), a leading global private equity firm investing in high-growth technology and software companies that drive transformative change in the industries they serve.

Founded in 2000, Kaseya currently serves customers in over 20 countries across a wide variety of industries and manages over 15 million endpoints worldwide. To learn more about our company and our award-winning solutions, go to and for more information on Kaseya's culture.

Kaseya is not your typical company. We are not afraid to tell you exactly who we are and our expectations. The thousands of people that succeed at Kaseya are prepared to go above and beyond for the betterment of our customers.

We are looking for a Staff Software Engineer to help design and enhance a cross-platform Endpoint Detection and Response (EDR) product with a strong focus on performance, security, and system-level integrity. The ideal candidate has a strong background in macOS development. This role involves low-level systems programming in Rust and requires a deep understanding of OS internals primarily in macOS. You'll play a key role in developing the core agent that monitors and responds to threats in real time across diverse environments.

• Systems Programming:
  
  Develop performant and secure system-level code in Rust for macOS endpoints.
• Agent Development:
  
  Build and maintain core components of the EDR agent, including event collection, telemetry, and detection logic.
• OS Integration:
  
  Interface with platform-specific APIs, system calls, and kernel/user-space boundaries to collect and respond to endpoint data.
• Security & Performance:
  
  Implement real-time monitoring and threat detection logic that is lightweight, resilient, and secure.
• Code Quality & Reliability:
  
  Write idiomatic Rust with strong emphasis on memory safety, concurrency, and correctness.
• Testing & Debugging:
  
  Develop robust unit, integration, and system-level tests; debug platform-specific issues across operating systems.
• Collaboration:
  
  Work closely with security researchers, backend engineers, and QA to deliver reliable endpoint protection across environments.

• Languages:
  
  Rust (primary), with familiarity in C/C++ for system interaction where necessary. Alternatively, candidates with strong C/C++ background willing to learn Rust will be considered.
• Platforms:
  
  macOS (main focus), Linux (various distros), Windows (Windows 10/11, Server)
• Tooling:
  
  Cargo, Git, Clippy, Rustfmt, GDB/LLDB, Wireshark, Sysinternals, strace/dtrace/ETW
• Security Concepts:
  
  OS telemetry, system call interception, userland vs. kernel-space, sandboxing, secure IPC

• 5+ years of experience in systems programming, including 2+ years with Rust,or alternatively 5+ years of experience with C/C++ systems programming and a willingness to learn Rust.
• Deep understanding of OS-level concepts such as process/thread management, memory, filesystems, and networking
• Experience developing cross-platform software or writing platform-specific code for macOS, Linux, and Windows
• Familiarity with endpoint security concerns such as process injection, privilege escalation, and evasion techniques
• Comfortable working close to the operating system, including low-level debugging and performance profiling
• Strong knowledge of secure coding principles and techniques for minimizing attack surfaces
• Self-directed and highly detail-oriented, with a passion for building robust and reliable low-level software

Join the Kaseya growth rocket ship and see how we are #ChangingLives

Additional information

Kaseya provides equal employment opportunity to all employees and applicants without regard to race, religion, age, ancestry, gender, sex, sexual orientation, national origin, citizenship status, physical or mental disability, veteran status, marital status, or any other characteristic protected by applicable law.