Principal Systems Engineer (£150k-£195k + Equity) at Harmonic Security Inc.

Jack & Jill
📍 london, england, United-Kingdom 💼 Full-time 🕒 Posted June 30, 2026

Job Description

Principal Systems Engineer

Salary: £150k-£195k + Equity

Company Description

Harmonic Security Inc. is a ~$25M Series A cybersecurity startup backed by Next47 and Ten Eleven Ventures, defining the AI security category. They build zero-touch data protection platforms that allow enterprises to safely adopt AI tools by protecting sensitive data at the endpoint in real time with sub-500ms inference.

Job Description

As a Principal Systems Engineer at Harmonic Security Inc., you will lead the development of low-level, security-critical endpoint agent software. Operating across Windows, macOS, and Linux, you’ll build high-performance Rust components that monitor and protect data movement. This is a mission-critical role defining how enterprises secure their AI-driven future at the OS level.

Location

London, UK

Why this role is remarkable

  • Build a category-defining product at a $25M Series A startup fou...

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Job Details

  • Location london, england
  • Job Type Full-time
  • Category IT & Technology
  • Posted Date June 30, 2026
  • Application Deadline August 09, 2026