Posted 5 months ago
Backend Software Engineer
@ Theori
Remote in Canada
Overview
Theori is hiring a backend software engineer to build and scale AI-driven cybersecurity platforms, including Xint, its autonomous penetration testing framework. The work covers designing backend services and APIs, data pipelines for LLM agent workflows, and mentoring junior engineers. The role is full-time, remote-first, and requires 5+ years of production engineering experience and residence in the US or Canada.
Responsibilities:
- Build and maintain backend services and APIs for AI security platforms
- Design for performance, scalability and fault-tolerance
- Build data pipelines for LLM agent workflows and real-time scanning
- Establish backend best practices and CI/CD processes
- Mentor junior engineers
Requirements summary:
- 5+ years of professional software engineering experience
- Strong Python proficiency, FastAPI preferred
- Experience with Redis, PostgreSQL and Docker
- Familiarity with LLM workflows or event-based architectures
- Based in US or Canada
Tools & skills
Benefits mentioned
Source and dates
Employer career site / ATS feed · ashby
- Employer posting date
- 2026-06-04
- First seen by our source
- 2026-10-12
- Source record updated
- 2026-10-19
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 |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Languages | English |
| Perks mentioned | Generous paid time off, Stock or equity, Home office allowance |
Summary and details written by AI from the posting; the employer’s posting is the authority.
Theori
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.
Empowering Innovation with Security.
Full company description
Theori is a cybersecurity firm with a mission to make the world more secure by conquering the most difficult cybersecurity challenges. We empower innovation with security. As a leader in offensive cybersecurity, we always strive to stay one step ahead of attackers. We secure the future by solving the impossible with technology-driven approaches, and serve as a hub that leads positive impact and innovation in the cybersecurity field.
- LinkedIn followers
- 3,572
- People associated on LinkedIn
- 88
- Reported office locations
- 600 Congress Ave., 14th Floor, Austin, TX 78701, US
- 414, Teheran-ro, Seoul, KR
- Other recorded names
- Theori
- Specialties
- Offensive Security
- Security Consulting
- Blockchain Security
- Vulnerability Research
- Bug Bounty
- Cybersecurity Education
- Security Audit
- Penetration Testing
- Web3 Security
- and Ethical Hacking
- Profile identifies a recruitment agency
- No
Theori is a cybersecurity firm with a mission to make the world more secure by conquering the most difficult cybersecurity challenges. We empower innovation with security. As a leader in offensive cybersecurity, we always strive to stay one step ahead of attackers. We secure the future by solving the impossible with technology-driven approaches, and serve as a hub that leads positive impact and innovation in the…
| Field | Value |
|---|---|
| Industry | Computer and Network Security |
| Company size | 51-200 employees |
| Headquarters | Austin, TX |
| Organization type | Privately Held |
| Year founded | 2016 |
| Specialties | Offensive SecuritySecurity ConsultingBlockchain SecurityVulnerability ResearchBug BountyCybersecurity EducationSecurity AuditPenetration TestingWeb3 Securityand Ethical Hacking |
| Open jobs on Jobsy | 3 |
| View page |
We’re looking for an experienced backend engineer to help build and scale the next generation of AI-driven cybersecurity platforms at Theori. You’ll play a key role in architecting and implementing core backend systems that power Xint, our autonomous penetration testing framework.
This is a foundational role in our NA engineering team—ideal for someone who thrives on solving complex systems challenges, enjoys designing for scale and reliability, and wants to help define engineering excellence in a fast-growing, AI-first company.
Key Responsibilities
Architect, develop, and maintain backend services and APIs that power Theori’s AI security platforms.
Design for performance, scalability, and fault-tolerance across distributed systems.
Collaborate with product and frontend engineers to define and deliver secure, well-structured APIs.
Build and optimize data pipelines supporting LLM agent workflows and real-time scanning.
Establish backend best practices, coding standards, and CI/CD processes for a growing US team.
Write clean, well-tested, and maintainable code in Python and related technologies.
Mentor junior engineers and contribute to a strong, collaborative engineering culture.
Requirements
5+ years of professional software engineering experience building production systems.
Strong proficiency in Python, with proven experience developing reliable backend services (FastAPI preferred).
Solid understanding of system design, distributed architectures, and performance optimization.
Experience with Redis, PostgreSQL, and Docker-based environments.
Familiarity with AI/LLM-driven workflows or asynchronous, event-based architectures.
Comfort working in an early-stage environment with evolving requirements.
Self-directed, ownership-oriented, and comfortable driving projects from design to deployment.
Based in US or Canada.
Nice to Have
Experience with Rust.
Background in cybersecurity, application security, or vulnerability analysis.
Knowledge of message queues, task orchestration, or microservices.
Familiarity with LLM integration, RAG pipelines, or vector databases.
Prior experience in startups or B2B SaaS environments.
Previous involvement in building or scaling distributed systems or engineering teams.
What We Offer
Compensation & Benefits
Competitive salary + equity
Health, dental, and vision insurance
Generous PTO policy
Remote work
Laptop + home office stipend
Engineering Culture
Ship features that matter
Modern Python-based stack (FastAPI, Redis, PostgreSQL, Docker)
Strong focus on testing and quality
Clear documentation and processes
Collaborative, low-ego team
Career growth and mentorship
Work-Life Balance
Flexible hours, remote-first culture
Focus on outcomes, not hours
Journal
Only you can see this. Kept on this device, and in your account when you sign in.