---
title: 'Senior, Developer Relations and Technical Marketer at Theori'
canonical: 'https://feeny.ai/job/senior-developer-relations-and-technical-marketer-theori-united-states-kezmr226rrn2'
type: 'job'
last_seen: '2026-10-15'
---

# Senior, Developer Relations and Technical Marketer at Theori

- **Company:** Theori
- **Location:** United States
- **Employment:** full-time
- **Work type:** remote
- **Posted:** 2026-10-05
- **Last confirmed live:** 2026-10-15
- **Apply:** https://jobs.ashbyhq.com/theori/052fd62d-2d2d-4790-a98d-dd39a9e9cc57

## Job description

Senior, Developer Relations and Technical Marketer Location: Remote (US/CAN), Type: Full-time Experience: Senior (5+ years) Summary Theori is a global leader in offensive security, founded by the world's most elite hackers. With a decade of unparalleled technical expertise, we're revolutionizing the cybersecurity paradigm with Xint, our AI-native AppSec platform spanning Xint Web (autonomous web app penetration testing) and Xint Code (AI-powered code security). Xint has been featured in The Verge, is in production with customers like Samsung Electronics, and is being adopted by security teams who want hacker-grade testing without hiring an army of pentesters.

The Senior, Developer Relations and Technical Marketer is Xint's voice to security practitioners: AppSec engineers, pen testers, security analysts/researchers and the developers who fix what they find. This role turns our researchers' vulnerability discoveries and the platform's capabilities into research, content and talks that practitioners trust.

This is a senior, hands-on role. This person sets the technical content agenda, does original research personally, and is on stage and in the community as the person practitioners know from Xint. The role works closely with the research team, product, and the rest of marketing.

## Key Responsibilities

- Set Xint's technical content agenda and develop original research on application security, vulnerability classes and AI-assisted offensive security.
- Run that research, alone or with Theori's researchers, from hypothesis through findings and publication.
- Turn research into assets practitioners use: write-ups, tools, datasets and reproducible proof-of-concepts.
- Write technical deep dives on vulnerabilities our researchers discover, from root cause to exploit path to fix.
- Create written and video tutorials, quick-start guides, demo environments and sample projects that get practitioners to a first finding fast.
- Own the annual CFP calendar, submit talks and papers to security conferences including Black Hat, DEF CON, OWASP Global AppSec and BSides, and represent Xint on stage, on panels and on podcasts.
- Host Xint's monthly webinar end to end: set the agenda, book guests, run the session and repurpose the recording.
- Engage practitioners in Reddit, Discord and other security communities, carry their feedback back to product and research, and maintain Xint's public vulnerability tracker with research on disclosure timing.

## Requirements

- 5+ years in technical marketing, developer relations or developer advocacy, ideally for security or developer tools.
- A public portfolio of technical blogs, how-to videos, tutorials and quick-start documentation you wrote and produced.
- Hands-on security knowledge: you can read code, explain a vulnerability class such as injection, auth bypass, SSRF or deserialization, and reproduce an exploit path.
- A record of conference talks, accepted CFPs or published research.
- Comfort on camera and on stage, including hosting live sessions with guests.
- Credibility in practitioner communities, with an authentic, non-promotional style of engagement.
- Clear, precise writing that treats practitioners as peers.
- BS in computer science or a related field, or equivalent practical experience.

## Nice to Have

- Deep application security or penetration testing experience, such as work as a pen tester, AppSec engineer or bug bounty hunter.
- CVEs, bug bounty findings or CTF results to your name.
- Security certifications such as OSCP, OSWE or GWAPT.
- Experience with SAST, DAST or pen testing workflows and tooling, from the practitioner's side.
- Working knowledge of how LLMs are applied to security analysis.

## What We Offer

## Compensation & Benefits

- Competitive salary + equity
- Health, dental, and vision insurance
- Generous PTO policy
- Remote work
- Laptop + home office stipend
- 401(k) match

Why Join Theori?

- Cutting-edge product: AI-driven security tools that protect real systems
- Smart team: Collaborate with world-class engineers and security researchers
- Growth stage: Join early and help define the culture of our North American team
- Real impact: Shape how AI transforms cybersecurity

Hiring Process

- 30-min intro call with product marketing and head of marketing
- 30-45-min conversation and technical assessment with a research counterpart
- 45-min presentation with cross-functional panel
- Offer

## About Theori

## Company Overview
- **One-liner**: Theori is an offensive cybersecurity company that uses AI-powered solutions and elite hacker expertise to secure AI systems, applications, and networks for global clients.
- **Entity Type**: Private (Seed stage)
- **Headquarters**: Austin, Texas, United States (US office); Seoul, South Korea (Korea office)
- **Founded**: 2016
- **Founders**: Not publicly listed (company built by elite hackers with multiple DEF CON wins)

## Core Business
- **Primary industry/industries**: Cybersecurity (offensive security, AI security, application security, blockchain security, security training)
- **Target customers**: Enterprises (B2B) – including Microsoft, Google, Okta, POSCO DX; also government and defense organizations
- **Mission or purpose statement**: “Raising the standard of security at every turn” – Theori tackles the most difficult cybersecurity challenges from an attacker’s perspective and trains the next generation of security leaders.

## Products & Services
- **Xint**: AI-powered application security testing (AST) solution that identifies vulnerabilities with human-level expertise, speed, and cost efficiency. Includes Xint Code for real-time code scanning.
- **αprism**: LLM security monitoring and guard model that continuously monitors prompts and model responses to protect AI interactions.
- **Dreamhack / Dreamhack Enterprise**: Cybersecurity training platform offering interactive, self-paced learning and customizable curricula for enterprises. Includes a paid subscription service and in-house competition management.
- **PatchDay**: Bug bounty platform launched in 2024.
- **ChainLight / ChainLight DART**: Blockchain security audit and risk management services.
- **Fermium-252**: Threat intelligence database.
- **AI Red Teaming**: Expert-led audits covering all angles of AI systems to identify vulnerabilities before exploitation.
- **Relic Protocol**: Chain data attestation protocol (launched 2018).
- **Upside Academy**: Cyber training program (now in its 3rd edition).

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Total Funding – **$15.5 million** (seed round led by K2G Fund, reported in 2025); prior investment from NAVER (2020).
- **Notable Investors/Partners**: K2G Fund (lead), NAVER, POSCO DX (strategic partnership), Okta (strategic cybersecurity partnership).
- **Growth Signals**:
  - Won #1 in DARPA AI Cyber Challenge (AIxCC) Semifinals (2024)
  - 9 DEF CON competition wins
  - Over 50 international hacking competition wins
  - Beta launch of αprism in April 2025
  - Launch of PatchDay bug bounty platform (August 2024)
  - Partnership with POSCO DX for AI-driven security framework (May 2025)
  - Received Presidential Commendation from the President of South Korea (2022)
  - Opened US office in Austin, TX

## Competitive Advantages
- **Elite Hacker Team**: Built by top offensive security experts with proven track records in global hacking competitions (DEF CON, AIxCC).
- **AI-Native Security**: Products like Xint and αprism are purpose-built for the AI era, monitoring and securing LLMs and codebases proactively.
- **Offensive Security Approach**: Tests systems from an attacker’s perspective, identifying vulnerabilities before malicious actors can exploit them.
- **Trusted by Industry Leaders**: Microsoft, Google, and Okta rely on Theori’s research and solutions.
- **Dual Headquarters (US + Korea)**: Allows access to both American and Asian markets and talent pools.

## Strategic Focus
- **AI Security Leadership**: Expanding AI-powered security solutions (Xint, αprism) and AI red teaming services to address emerging threats.
- **Training the Next Generation**: Growing Dreamhack enterprise offerings and Upside Academy programs to build a skilled cybersecurity workforce.
- **Continuous Innovation**: Annual independent research period for employees and ongoing product launches (PatchDay, ChainLight, Fermium-252).
- **Global Expansion**: Building US presence from Austin office while maintaining strong Korea operations.

## Why Work Here
- **Culture Highlights**: “Built by elite hackers” – the company emphasizes hands-on hacking, continuous learning, and ethical transparency. Annual independent research period and support for CTF competitions.
- **Remote/Hybrid/Office Policy**: Hybrid workspace with two offices (Austin, TX and Seoul, Korea). Remote positions available (e.g., AppSec Engineer, Backend Software Engineer).
- **Notable Perks**:
  - Unlimited leave system
  - 1-month sabbatical leave for every 3.5 years
  - Learning stipend and education/personal development stipend
  - Technology stipend
  - Meal allowance, free snacks and drinks
  - Monthly Culture Day
  - Seasonal corporate gifts
  - Annual health screenings (Korea)
  - Support for workplace social clubs
  - Mentoring program for new recruits
  - Military service exemption business (Korea)

## Sources
1. [theori.io](https://theori.io/)
2. [theori.io/about](https://theori.io/about)
3. [theori.io/career/culture](https://theori.io/career/culture)
4. [jobs.ashbyhq.com/theori](https://jobs.ashbyhq.com/theori)
5. [builtin.com](https://builtin.com/company/theori-inc)

## Other roles at Theori

- [Senior Recruiter](https://feeny.ai/job/senior-recruiter-theori-austin-6jbq5f17fa8a) — Austin, TX
- [Senior Performance / Growth Marketer](https://feeny.ai/job/senior-performance-growth-marketer-theori-united-states-dy4968b9t16p) — United States
- [AppSec Engineer](https://feeny.ai/job/appsec-engineer-theori-united-states-qw04q9qs65t6) — United States
- [Backend Software Engineer](https://feeny.ai/job/backend-software-engineer-theori-united-states-g0n0j5rwvavp) — United States