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Open nowPosted 10 days ago

Senior Software Engineer, Mobile Security Analysis

Theori7 open roles

Pay
$175,000 – $235,000 a year
Where
Washington, DC metro area
Work mode
Hybrid
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Your applicationOpen nowSenior Software Engineer, Mobile Security AnalysisTheori · Washington, DC metro area

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The clock on this job

Early applications get read.

12.3% of postings close within 7 days. Measured by our own scanner across the market.

Share of postings closed within
  1. 2.1%1 day
  2. 4.5%3 days
  3. 12.3%7 days
  4. 19.3%14 days
  5. 35.6%30 days
  6. 57.8%60 days
This job: posted 10 days ago

The posting

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.

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

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