Job Title: Systems Engineer
Salary: £150k–£195k + Equity
Company Description: Harmonic Security Inc. – Series A cybersecurity startup defining AI data protection.
Location: London, UK
Job Description
Join a category-defining startup building the future of AI security. As a Systems Engineer, you will own the development of low-level, security-critical endpoint agents across Windows, macOS, and Linux. Working primarily in Rust, you'll design resilient client software that enables enterprises to adopt AI tools safely while protecting sensitive data in real-time.
Why this role is remarkable
- Shape a new category of cybersecurity at a Series A startup backed by $25M from elite investors like Next47, Ten Eleven Ventures, and In‑Q‑Tel.
- Work at the OS level on high‑impact software that runs on millions of devices, requiring extreme performance, reliability, and sub‑500ms inference speeds.
- Join an AI‑first engineering culture led by seasoned founders who previously scaled Digital Shadows, offering significant equity and high technical ownership.
What you will do
- Design and optimize cross-platform security agent components in Rust to enforce data policy and collect system signals on-device.
- Conduct deep technical research into OS subsystems to implement cutting‑edge product features and solve platform‑specific challenges with precision.
- Build robust CI/CD pipelines and validation tooling to ensure stable, reproducible native application releases for global enterprise customers.
The ideal candidate
- Extensive professional experience in Rust or C++ systems programming, focusing on memory safety, concurrency, IPC, and platform-specific APIs.
- Proven track record of shipping production‑grade security software such as EDR, XDR, or DLP agents across Windows, Linux, and macOS platforms.
- Disciplined engineering mindset with a passion for automated testing, observability, and using AI tools to accelerate the software development lifecycle.
Job Title: Systems Engineer
Salary: £150k–£195k + Equity
Company Description: Harmonic Security Inc. – Series A cybersecurity startup defining AI data protection.
Location: London, UK
Job Description
Join a category-defining startup building the future of AI security. As a Systems Engineer, you will own the development of low-level, security-critical endpoint agents across Windows, macOS, and Linux. Working primarily in Rust, you’ll design resilient client software that enables enterprises to adopt AI tools safely while protecting sensitive data in real-time.
Why this role is remarkable
- Shape a new category of cybersecurity at a Series A startup backed by $25M from elite investors like Next47, Ten Eleven Ventures, and In‑Q‑Tel.
- Work at the OS level on high‑impact software that runs on millions of devices, requiring extreme performance, reliability, and sub‑500ms inference speeds.
- Join an AI‑first engineering culture led by seasoned founders who previously scaled Digital Shadows, offering significant equity and high technical ownership.
What you will do
- Design and optimize cross-platform security agent components in Rust to enforce data policy and collect system signals on-device.
- Conduct deep technical research into OS subsystems to implement cutting‑edge product features and solve platform‑specific challenges with precision.
- Build robust CI/CD pipelines and validation tooling to ensure stable, reproducible native application releases for global enterprise customers.
The ideal candidate
- Extensive professional experience in Rust or C++ systems programming, focusing on memory safety, concurrency, IPC, and platform-specific APIs.
- Proven track record of shipping production‑grade security software such as EDR, XDR, or DLP agents across Windows, Linux, and macOS platforms.
- Disciplined engineering mindset with a passion for automated testing, observability, and using AI tools to accelerate the software development lifecycle.
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