Staff AppSec Engineer: Build AI-Powered Security Platforms

Colossus Technologies Group; United States; On-site; USD 180,000 - 260,000; Full time

Job summary

Colossus Technologies Group is seeking a Staff Security Engineer focused on building the next generation of its Application Security program. This role centers on creating security tooling and automation rather than merely running scanners or gatekeeping code reviews.

You will work on AI-powered agents, AI-assisted SAST/DAST, and automated threat modeling to scale security across fast-moving engineering teams. Strong coding skills in Python or Go are essential for production-grade tooling.

Qualifications

• Experience building AppSec tooling or security product features.
• Strong coding skills in Python, Go or similar languages.
• Ability to analyze production code and architecture for vulnerabilities.

Responsibilities

• Design and build scalable AppSec systems and tooling.
• Develop AI-powered agents to review architecture and code for vulnerabilities.
• Advance SAST/DAST capabilities with AI to find gaps in existing tooling.
• Automate threat modeling and secure design reviews at scale.
• Integrate security feedback into developers' CI/CD workflows.
• Research new attack paths and turn findings into repeatable tooling.

Skills

Security engineering

AppSec

Python

Go

Threat modeling

Code review

Tools

Security scanners

Static analysis

Dynamic analysis

CI/CD tooling

Job description

Colossus Technologies Group is seeking a Staff Security Engineer focused on building the next generation of its Application Security program. This role centers on creating security tooling and automation rather than merely running scanners or gatekeeping code reviews.

You will work on AI-powered agents, AI-assisted SAST/DAST, and automated threat modeling to scale security across fast-moving engineering teams. Strong coding skills in Python or Go are essential for production-grade tooling.