Remote Senior AI Security Engineer - Build AI Agent Security

Colossus Technologies Group; United States; On-site; USD 210,000 - 280,000; Full time

Job summary

Colossus Technologies Group is recruiting a Staff Security Engineer to own security for AI agents and related infrastructure in a fast-growing startup. This remote US role offers significant technical ownership and equity.

You will design and implement security capabilities for agentic systems, MCP servers, and plugin ecosystems, translating threat research into production defenses. Competitive compensation mid-$200Ks with early-stage equity is offered.

Qualifications

• 8+ years of software/security engineering experience.
• Hands-on Python and security tooling development.
• Experience building security products or tooling.
• Strong understanding of modern API security.

Responsibilities

• Build security products for AI agents and agentic infrastructure.
• Develop scanners, parsers, rule engines, and automated checks.
• Identify risky AI/agent activity across environments.
• Collaborate across security domains (application, API, supply chain).
• Shape threat research into production capabilities.

Skills

Python

Security engineering

Offensive security

Security tooling

Product security

Detector engineering

Job description

Colossus Technologies Group is recruiting a Staff Security Engineer to own security for AI agents and related infrastructure in a fast-growing startup. This remote US role offers significant technical ownership and equity.

You will design and implement security capabilities for agentic systems, MCP servers, and plugin ecosystems, translating threat research into production defenses. Competitive compensation mid-$200Ks with early-stage equity is offered.