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‑...