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Twilio logo
Twilio

Build the future of communications.

Staff Engineer, Offensive Security

Security EngineerSecurity EngineerFull TimeRemoteLeadTeam 5,001-10,000H1B SponsorCompany SiteLinkedIn

Location

Ireland

Posted

90 days ago

Salary

0

Seniority

Lead

Job Description

Staff Engineer, Offensive Security

Twilio

• Full-Stack Penetration Testing: Perform manual and automated testing of web applications, APIs, and mobile apps (iOS/Android) • Internal/External Network Audits: Conduct network and cloud level assessments with various tooling • Vulnerability Validation: Triage and validate reports from automated scanners or bug bounty hunters to eliminate false positives and escalate true positives • AI/LLM Probing: Perform initial prompt injection and jailbreak tests on AI prototypes, services, and applications using established checklists (OWASP Top 10 for LLMs) • Technical Reporting: Draft high-quality reports that detail the "path to compromise" with clear, reproducible steps for developers • Tool Maintenance: Manage and update the team's testing infrastructure (e.g., Burp Suite, and basic C2 listeners) • Remediation Support: Provide direct technical guidance to engineering teams on how to patch vulnerabilities like XSS, SQLi, and IDOR • Adversary Emulation: Design and lead multi-week Red Team operations that mimic specific threat actors to test the SIRT detection capabilities • Custom Exploit Development: Build custom payloads, droppers, and obfuscated scripts to bypass EDR/AV and maintain stealth • AI Red Teaming Architecture: Build automated testing frameworks for AI systems to test for models related to sensitive data leakage • Cloud & Infrastructure Attacks: Execute sophisticated attacks against AWS/Azure/K8s, focusing on IAM misconfigurations and container escapes • Purple Teaming: Collaborate with SIRT and Detection Engineering to tune SIEM alerts based on the techniques used during an engagement • Strategic Bug Bounty Management: Oversee the organization's bug bounty program, identifying trends in submissions to suggest broad architectural security changes

Job Requirements

  • 7-10 years in offensive security, penetration testing, a high-volume bug bounty background, AppSec, or vulnerability exploitation
  • Expert Knowledge and solid understanding of the MITRE ATT&CK matrix and the OWASP Top 10 for web applications and top 10 for LLMs
  • Proficient in OffSec popular tools like Burp Suite professional, Nmap, Metasploit, Wireshark
  • Ability to write functional scripts in Python or Bash to automate repetitive testing tasks, proficiency in coding and scripting like Python, C++, and scripting for creating custom offensive exploits
  • Possession of advanced industry certifications such as OSCP, OSEP, OSWE, GXPN or similar training in OffSec tracks

Benefits

  • Competitive pay
  • Generous time off
  • Ample parental and wellness leave
  • Healthcare
  • Retirement savings program

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