Senior Backend Engineer - Agentic Pentest

Team8; Toronto; On-site; CAD 120,000 - 180,000; Full time

Job summary

Ox Security is seeking a Senior Backend Engineer to design and implement scalable backend systems and APIs, helping secure the AI-driven SDLC. You will collaborate with product, frontend, and other engineering teams to define architecture and requirements and drive reliability.

In this high-impact role you will optimize performance, scalability, and security, lead code reviews, mentor junior engineers, and continuously improve development processes in a fast-paced environment.

Qualifications

• Experience designing scalable backend systems and APIs.
• Strong knowledge of system architecture, performance and security.
• Experience leading code reviews and mentoring engineers.
• Ability to collaborate with cross-functional teams.

Responsibilities

• Design and implement scalable backend systems and APIs.
• Collaborate with Product, Frontend, and other engineering teams on system architecture and requirements.
• Optimize performance, scalability, and security of applications.
• Troubleshoot and resolve production issues with minimal downtime.
• Lead code reviews and promote best engineering practices.
• Mentor and support junior engineers.
• Continuously improve system design, reliability, and development processes.

Skills

Backend engineering

APIs design

Performance optimization

Security

Mentoring juniors

Code reviews

System architecture

Job description

Description

About the Position

Ox Security secures the AI-driven SDLC from prompt to production. We eliminate critical, real-time risks from AI code generation through cloud runtime by doing what conventional tools can't: unifying development and cloud context to stop vulnerabilities right at the source. At OX, we're building the future of cyber security for the AI era. If you're looking to work on disruptive technology with an amazing team, you belong here.

We're growing fast and looking for a Senior Backend Engineer to join our Engineering team and help build the infrastructure that powers our platform at scale.

This is a high-impact role where you'll work alongside top-tier engineers, designing and building secure, high-performance systems in a fast-paced environment. If you enjoy solving complex technical challenges and want your work to have real impact - we'd love to meet you.

Requirements:

What You'll Be Doing

• Design and implement scalable backend systems and APIs
• Collaborate with Product, Frontend, and other engineering teams on system architecture and requirements
• Optimize performance, scalability, and security of applications
• Troubleshoot and resolve production issues with minimal downtime
• Lead code reviews and promote best engineering practices
• Mentor and support junior engineers
• Continuously improve system design, reliability, and development processes