harmonic-security-inc - Principal Systems Engineer
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Requirements
• Strong hands-on experience with Rust (or C++ with a strong willingness to learn Rust) in production systems • Solid grasp of systems programming concepts: memory safety, lifetimes, threads, channels, error handling, IPC • Familiarity with platform APIs and subsystems on Linux, Windows and macOS • Experience building CI-tested, reproducible builds for native applications • Proficiency with common developer tooling: Git, code review, CI pipelines, structured logging, crash analytics • Networking skills and security fundamentals is a plus • YOU MIGHT BE A FIT IF YOU… • Have a strong development background and a rigorous approach to testing and validation. • Relish the prospect of writing code that will run on millions of devices and needs to be reliable and performant around the clock. • Enjoy working close to the OS and care deeply about software performance, correctness, and safety. (Previous Kernel or system-level development experience is a great nice-to-have!) • Can build and ship reliable systems fast, with a sharp eye for edge cases and long-term maintainability. • Learn quickly and independently, maintaining great attention to detail and high standards under pressure. • Have made contributions to open-source Rust (or C++) projects or RFCs. • Believe that good tooling and documentation are essential parts of engineering, not afterthoughts. • Thrive in fast-paced startup environments where ambiguity is the norm. • See AI as a fundamental tool to help you build smarter, faster, and better. • Actively use AI tools (Claude Code, Cursor, or similar) to accelerate your work across the entire lifecycle—from writing and debugging to researching and prototyping. • Stay current on how AI is changing the systems engineering domain and have opinions about where it helps and where it doesn't. • Refuse to default to the playbook you’ve been running for the last decade, choosing instead to automate the mundane and rethink legacy workflows to focus on high-expertise problems..
Responsibilities
• Design, implement, and optimise endpoint security agent components in Rust, targeting desktop and/or server platforms (Windows, macOS, Linux) • Build robust tests, validation tooling and deployment mechanisms for client facing releases that impact our customers in their everyday work • Conduct exploratory technical research to understand the art of the possible and how to best approach implementation of new product features • Investigate and resolve platform specific issues with precision and speed • Work closely with security engineers, backend engineers, and product stakeholders to shape technical requirements • WHAT SUCCESS LOOKS LIKE • You’ve shipped production Rust or C++ code that runs safely and efficiently across platforms • Your components are well tested, observable, and resilient to partial failures or bad input • You identify performance or architectural bottlenecks before they reach users • You actively reduce complexity in critical code paths without compromising clarity or functionality • You consistently deliver high-quality changes on a tight feedback loop, including regression-safe updates
Benefits
• This isn’t just a job; it’s an opportunity to be part of a team that is redefining cybersecurity. We believe today’s talent is tomorrow’s success, and we’re committed to creating an environment where you can do the best work of your life. • Competitive pay and meaningful equity with a direct stake in Harmonic’s success • Comprehensive benefits, pension plan, generous PTO, and flexible hybrid work • A small, passionate team that values transparency, creativity, and learning • Thoughtful leadership that cares deeply about growth, impact, and people • Annual global offsites (past trips include Lisbon and Nashville) • The chance to directly shape both our product and our culture as we build a category-defining company • HARMONIC'S CORE VALUES • 🌱 FLOURISH IN THE UNKNOWN • We embrace new, unfamiliar situations that require initiative and rapid decision-making. We orient ourselves quickly and deliver results with minimal guidance. • We raise our hands, take on challenges, and assist others whenever possible. We hunger for opportunities to learn and do more. • 🤝 PERFECT HARMONY • We support one another to create cohesion and unity. We collaborate openly, share feedback honestly, and help everyone produce their best work.
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