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Principal Systems Engineer at Harmonic Security - ApplyBlast

Principal Systems Engineer

Harmonic Security

4 months ago

London, England

Hybrid

Full Time

Senior

1 applicant

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About this role

As an endpoint engineer, you will design and implement low-level, security-critical client software in Rust or C++ to protect sensitive data and enforce AI safety policies across Windows, macOS, and Linux. This core role requires building robust, performant agent components that manage on-device controls while collaborating with product and security teams in a fast-paced startup environment.

Responsibilities

Design and implement endpoint security agent components in Rust
Build robust testing and validation tooling for client releases
Investigate and resolve platform-specific issues with precision
Collaborate with security engineers and product stakeholders
Identify performance and architectural bottlenecks in critical code

Skills

Qualifications

BS in Computer Science or related field

About Harmonic Security

harmonic.security

Headquarters

San Francisco, California, United States

Company Size

1-10 employees

Founded

2023

View Profile

Harmonic Security provides an AI Governance and Control platform that gives organizations complete visibility and control over AI usage across web, desktop, and agent-based workflows. Its product family includes Harmonic Explore for AI usage intelligence, Harmonic Guide for real-time browser and desktop visibility and control, and Harmonic Command for unified governance across humans and agents. Harmonic targets industries like technology, legal, insurance, and healthcare, offering shadow AI detection, data loss prevention, inline guardrails, and GenAI compliance to secure an AI-first workforce.

Recent company news

Amazon Web Services (AWS)

How Harmonic Security improved their data-leakage detection system with low-latency fine-tuned models using Amazon SageMaker, Amazon Bedrock, and Amazon Nova Pro | Amazon Web Services

Dec 11, 2025