First seen by our source: 26 days ago
Senior Backend Engineer - Agentic Pentest
@ OX Security
Toronto, Ontario
Overview
OX Security is hiring a Senior Backend Engineer to design and build scalable, secure backend systems and APIs for its AI-driven security platform. The role involves architecture work, leading code reviews, mentoring junior engineers and resolving production issues. Full-time, with unlimited PTO and comprehensive health coverage.
Responsibilities:
- Design and implement scalable backend systems and APIs
- Collaborate on system architecture with Product, Research and Frontend teams
- Optimize performance, scalability and security of applications
- Troubleshoot and resolve production issues with minimal downtime
- Lead code reviews and mentor junior engineers
Requirements summary:
- Bachelor's degree in Computer Science or a related field
- 5+ years of backend development experience
- Proficiency in Node.js
- Experience with SQL and NoSQL databases
- Familiarity with cloud platforms and microservices architecture
- Active use of AI tools to streamline coding
Tools & skills
Benefits mentioned
Source and dates
Employer career site / ATS feed · comeet
- Employer posting date
- Not provided
- First seen by our source
- 2026-10-11
- Source record updated
- 2026-11-05
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Seniority | Senior |
| Department | Software development |
| Experience | 5+ years |
| Hours per week | 40 (estimated) |
| Travel | air: none · ground: none |
| Work setting | Home, Office |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Languages | English |
| Education | Bachelor’s degree (required) |
| Fields of study | Computer Science |
| Perks mentioned | Generous paid time off |
Summary and details written by AI from the posting; the employer’s posting is the authority.
OX Security
Saved company profile
Historical company information from a saved The Jobs API profile (LinkedIn/Crunchbase fields). It is not live-verified; figures may have changed. Missing values remain unknown.
Securing your applications from Prompt to Runtime.
Full company description
OX Security removes risk at the source - eliminating exposures from AI code generation through cloud runtime - preventing security debt before it ever reaches production. Unlike conventional tools that cannot keep pace with modern, AI-driven development, or cloud-specific solutions that are infrastructure-only, the OX Platform pinpoints vulnerabilities at creation and remediates runtime exposures at the source.
- LinkedIn followers
- 40,460
- People associated on LinkedIn
- 205
- Reported office locations
- 488 Madison Ave, Suite 1103, New York, NY 10022, US
- 141 Greenwood Sq, Boston, Massachusetts 02136, US
- 7 Menachem Begin, Ramat Gan, Tel-Aviv District 52, IL
- Business categories
- Cyber Security
- Risk Management
- Network Security
- Artificial Intelligence (AI)
- Other recorded names
- OX Security
- Profile identifies a recruitment agency
- No
- Reported total investment
- 94,000,000
Currency and observation date were not supplied; this is not a current valuation or a funding round.
OX Security removes risk at the source - eliminating exposures from AI code generation through cloud runtime - preventing security debt before it ever reaches production. Unlike conventional tools that cannot keep pace with modern, AI-driven development, or cloud-specific solutions that are infrastructure-only, the OX Platform pinpoints vulnerabilities at creation and remediates runtime exposures at the source.
| Field | Value |
|---|---|
| Industry | Computer and Network Security |
| Company size | 51-200 employees |
| Headquarters | New York, NY |
| Organization type | Privately Held |
| Year founded | 2021 |
| Open jobs on Jobsy | 4 |
| View page |
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.
Responsibilities
What You’ll Be Doing
- Design and implement scalable backend systems and APIs
- Collaborate with Product, Research, 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
Requirements
What We’re Looking For
- Bachelor’s degree in Computer Science or a related field
- 5+ years of experience in backend development
- AI-First Approach – Active and proficient use of AI tools (e.g., ClaudeCode / Codex, Copilot, LLMs) to streamline coding practices, accelerate learning curves, and optimize workflows.
- Strong experience building scalable, production-grade systems
- Proficiency in Node.js
- Experience with SQL and NoSQL databases
- Familiarity with cloud platforms and microservices architecture
- Strong problem-solving skills and attention to detail
- Passion for writing clean, maintainable, and efficient code
Bonus Points for :
- Experience in the cybersecurity, SaaS, or Cloud Security domain.
- Hands-on experience with modern cloud environments (AWS/GCP), Docker, and Kubernetes.
Benefits Package (via Vensure)
We partner with Vensure to provide top-tier benefits for our Canada-based team members:
- Comprehensive Health Coverage: Medical, Dental, and Vision plans to keep you and your family healthy.
- Unlimited Paid Time Off (PTO): We offer unlimited vacation because we trust you to take time when you need it and to manage your time effectively. We value work-life balance and want you to recharge.
- Gifts on your birthday & anniversary & Holidays.
Journal
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