AI is being run everywhere, by humans and agents. Harmonic Security governs all of it. The AI Governance and Control (AIGC) platform understands user / agent intent and data context in real time, giving security teams visibility and control across every tool and workflow so companies can move faster with AI while minimizing risk.
We operate in one of the fastest-moving spaces in tech: the emerging intersection of AI and cybersecurity. It's a market still being defined, and we're among the first to build natively for it - protecting sensitive data in real time, at the endpoint, with minimal friction for the teams using it. Enterprises get full visibility and control. Their people get to innovate without guardrails slowing them down.
Named to the Rising in Cyber 2026 list, Harmonic is gaining serious recognition and serious traction. We're led by deep cybersecurity expertise and backed by investors who know the space: N47, Ten Eleven Ventures, and In-Q-Tel.
As AI adoption inside the enterprise accelerates, the ability to safely observe, control, and enforce policy in real time isn't a nice-to-have. It's mission-critical infrastructure. That's what we build.
Harmonic exists to help enterprises adopt AI safely and at scale. We hold ourselves to the same standard. Everyone at Harmonic actively uses AI tools to do their best work, from research and writing to building processes and automating workflows. We expect every new hire to bring curiosity about AI and a willingness to use it to work smarter, faster, and more creatively. For some roles, that means tinkering and staying open to new tools. For others, it means building entirely new systems with AI at the core. We'll be clear about what we expect for each role, and we'll give you the tools and support to get there.
Our Product Delivery team is the engine that turns vision into impact. We ship early and often, getting valuable features into the hands of customers quickly and iterating from there. We work in the open by default, sharing progress and ideas, and we trust each other to own outcomes. We’re a small but mighty crew where every person plays a critical role and we’re committed to using AI to work smarter and faster
We’re looking for a hands-on software engineer with deep expertise in Rust (or C++ with a strong willingness to learn and embrace Rust as your primary language) to help us build and evolve security critical client software. You will work on low level security agents and cross platform components that run on user devices, with a strong emphasis on robustness, performance and security. Your work will power core functionality in how we collect signals, and manage on-device controls for app usage and data movement.
You will join a fast-moving team that ships frequently and cares about correctness, observability and maintainability.
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
Strong hands-on coding 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
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..
This isn't just a job - it's a chance to help define a category. Harmonic Security was named to the Rising in Cyber 2026 list, and we're just getting started. We're building at the intersection of AI and security, carving out an emerging market where the rules haven't been written yet, and the people who join now will write them.
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.
Recognized momentum - We made the Rising in Cyber 2026 list, a signal that the market is taking notice
Rare market opportunity - Join early in a category-defining company at the convergence of AI and security, where your work directly shapes how enterprises tackle one of the biggest unsolved problems in tech
Competitive pay and meaningful equity - A real stake in Harmonic's success, not a token gesture
Comprehensive benefits - 401K, pension plan, generous PTO, and flexible hybrid work
A small, high-trust team that values transparency, creativity, and continuous learning - no politics, no bureaucracy
Thoughtful leadership - that cares deeply about your growth, not just your output
Annual global off-sites - past trips include Lisbon, Portugal and Nashville, TN
Real ownership - you'll shape the product, the culture, and the direction of the company from day one
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.
We support one another to create cohesion and unity. We collaborate openly, share feedback honestly, and help everyone produce their best work.
.
