Full-Time
Backend Software Engineer
Updated on 7/23/2026
Theori
51-200 employees
No salary listed
Remote in USA + 1 more
More locations: Remote in Canada
Remote
Remote role in the United States or Canada.
 Software Engineering (1) |
|---|
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- 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.
- 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.
- 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.
Theori delivers offensive-security cybersecurity solutions for government and commercial clients, combining proactive testing, threat intelligence, and training. Its products include Xint for AI-powered application security testing, αprism for securing AI models, Dreamhack for realistic hacking simulations, and Fermium-252, PatchDay, and ChainLight for threat intelligence, bug bounty, and blockchain security. Its services cover penetration testing, source code audits, APT simulations, and Security Team as a Service (STaaS), which places experts inside a client’s operations for ongoing security guidance and incident response. Theori stands apart through its Carnegie Mellon hacker heritage and a proven track record in competitions, offering an integrated suite of tools and embedded security talent to help clients stay ahead of threats and reduce risk.
Company Size
51-200
Company Stage
Early VC
Total Funding
$11.5M
Headquarters
Austin, Texas
Founded
2016
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Benefits
Health Insurance
Dental Insurance
Vision Insurance
Paid Vacation
Remote Work Options
Home Office Stipend
Company Equity
Growth & Insights and Company News
6 month growth
↑ 5%1 year growth
↑ 2%2 year growth
↑ 5%Linux Copy Fail bug actively exploited, urgent patch warning issued. Cybersecurity authorities have raised a serious alarm after a newly disclosed Linux vulnerability, known as "Copy Fail," is now being actively exploited in real-world attacks just a day after its public disclosure. Tracked as CVE-2026-31431, the flaw exists in the Linux kernel's algif_aead cryptographic interface. It allows unprivileged local users to gain full root access on affected systems. Attackers can exploit this bug by writing controlled data into the page cache of readable files, ultimately taking complete control of the system. Security researchers from Theori revealed the vulnerability and released a proof-of-concept exploit, describing it as fully reliable. The exploit has already been tested successfully on major distributions, including Ubuntu 24.04 LTS, Amazon Linux 2023, RHEL 10.1, and SUSE 16. According to researchers, the same exploit works across nearly all Linux distributions released since 2017 without modification, making the issue extremely widespread. Shortly after the disclosure, the Cybersecurity and Infrastructure Security Agency added the vulnerability to its Known Exploited Vulnerabilities catalog. The agency has instructed U.S. federal agencies to patch affected systems within two weeks, warning that such flaws are commonly used by attackers and pose significant risks. Although the directive officially applies to government systems, security experts are urging all organizations and Linux users to update their systems immediately. At the time of disclosure, some vendors had not yet released official patches, though updates are now beginning to roll out. This incident follows another recent Linux security issue, CVE-2026-41651, also known as Pack2TheRoot, which had remained undiscovered for years before being fixed. If this article helped you, please consider supporting its work. Every small contribution keeps Abijita.com independent and running. The rapid exploitation of the Copy Fail bug highlights how quickly attackers move once vulnerabilities become public, making timely patching critical for system security. Bijay Pokharel is the Founder and Editor-in-Chief of Abijita.com and a freelance technology writer covering the tech industry since 2017. He specializes in cybersecurity, digital privacy, malware, vulnerabilities, and online safety, with a strong interest in internet protection and women's online security. A dedicated tech enthusiast and continuous learner, Bijay approaches his professional work with clarity, rational thinking, and a calm, solution-oriented mindset.
Theori is also introducing αprism, an LLM security and monitoring solution.