Low-Level AI Systems Engineer - Security Research

Zealot Labs, Inc.; Greater London; Hybrid; GBP 105,000 - 165,000; Full time

Benefits offered by this job

Skin in the game equity

Job summary

Zealot Labs, Inc. is seeking a strong low-level systems engineer to join a small, ownership-driven team in London. You will work on AI-driven vulnerability research, operating system internals, and performance-critical code that ships to production.

The role demands a deep fluency close to the metal and a willingness to operate in a fast-paced startup environment. The position requires in-person presence in London five days a week, with full relocation support and eligibility for U.S.

Qualifications

• 2+ years of engineering experience. Open to exceptional new grads with demonstrated low-level systems work.

Responsibilities

• Build production systems that conduct AI-driven vulnerability research and exploit development at scale.
• Work close to the metal: operating system internals, kernel-level interfaces, and low-level performance optimization.
• Own problems end-to-end across architecture, implementation, and shipped production code.
• Partner directly with vulnerability researchers, security operators, and the engineering team to convert manual cyber operations into automated, repeatable systems.
• Help define the standards and operating cadence of a team that intends to set the bar for AI-native cyber.

Skills

Low-level systems

Kernel development

OS internals

Performance optimization

C/C++ experience

Production code

London in-person

Job description

Zealot Labs, Inc. is seeking a strong low-level systems engineer to join a small, ownership-driven team in London. You will work on AI-driven vulnerability research, operating system internals, and performance-critical code that ships to production.

The role demands a deep fluency close to the metal and a willingness to operate in a fast-paced startup environment. The position requires in-person presence in London five days a week, with full relocation support and eligibility for U.S.