Backend Software Engineer

United States, Remote. Posted 5 months ago

The role

You will architect, develop, and maintain backend services and APIs for AI-driven cybersecurity platforms. You will design for performance and scalability to power the Xint autonomous penetration testing framework.

What you will do

Architect, develop, and maintain backend services and APIs
Design for performance, scalability, and fault-tolerance across distributed systems
Collaborate with product and frontend engineers to deliver secure APIs
Build and optimize data pipelines supporting LLM agent workflows and real-time scanning
Establish backend best practices, coding standards, and CI/CD processes
Write clean, well-tested, and maintainable code in Python
Mentor junior engineers

Required qualifications

5+ years of professional software engineering experience building production systems
Strong proficiency in Python
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
FastAPI preferred

Benefits

Competitive salary + equity
Health, dental, and vision insurance
Generous PTO policy
Remote work
Laptop + home office stipend

About the company

Theori is an AI-first company building AI-driven cybersecurity platforms, including the Xint autonomous penetration testing framework.