Senior Software Engineer, Mobile Security Analysis
At Theori · Washington, DC metro area
Salary: US$175,000–235,000 a year
- Security
- Full-time
- Senior
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Where you’ll work
Hybrid, based in the United States
“Washington, DC metro area”
From the location.
The job board lists it as hybrid.
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- Posted
- 15 October 2026
- First seen by us
- 3 November 2026
- Last checked
- 23 hours ago
Job description
From Theori’s job post, as they wrote it.
Summary
We're looking for an experienced Senior Software Engineer to help build the next generation of AI-driven security analysis at Theori. You'll play a key role in designing and implementing analysis capabilities that power Xint, our autonomous penetration testing framework, with a focus on mobile applications.
This is a foundational role on our US engineering team, ideal for someone with a reverse engineering background who wants to turn hands-on security research into automated systems. The work spans commercial products and U.S. government research efforts.
Read the full description
Key Responsibilities
* Design, develop, and maintain analysis capabilities that power Theori's AI security platforms.
* Build static and binary analysis tooling in Python on top of established reverse engineering frameworks.
* Develop instrumentation and test infrastructure for evaluating applications on real devices.
* Work with security researchers to turn manual techniques into automated, repeatable analysis.
* Measure and improve analysis quality against real-world targets.
* Write clean, well-tested, and maintainable code in Python and related technologies.
* Document and present technical results to customers and internal stakeholders.
Requirements
• 5+ years of professional software engineering experience building production systems.
• Strong proficiency in Python.
• Experience with reverse engineering tools such as Binary Ninja, IDA Pro, or Ghidra.
• Solid understanding of mobile platform internals, Android, iOS, or both.
• Familiarity with program analysis concepts such as control flow, data flow, and taint tracking.
• Self-directed, ownership-oriented, and comfortable driving projects from design to deploymen
• U.S. citizenship.
• Based in, or willing to relocate to, the Washington, DC metro area. The role is remote day-to-day, with periodic on-site work at client facilities in the DC area.
Nice to Have
• Experience with dynamic instrumentation tools such as Frida.
• Background in vulnerability research, including published CVEs.
• Experience with fuzzing.
• Familiarity with AI/LLM-driven workflows.
• Prior work on government-funded research programs.
• CTF experience.
• Active TS/SCI clearance.
What We Offer
Compensation & Benefits
• Competitive salary + equity
• Health, dental, and vision insurance
• Generous PTO policy
• Remote work (DC metro based)[2] [3]
• Laptop + home office stipend
• 401(k) match
Team Culture
• Ship features that matter
• Modern Python-based stack
• 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[4] cultureremote with occasional client-site days
• No on-call rotations or weekend deployments
• Focus on outcomes, not hours
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
1. 30-min intro call with hiring manager
2. 60-min technical interview
3. Offer
Senior Software Engineer, Mobile Security AnalysisTheori
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