Twilio

Twilio

Twilio is a cloud communication company that offers Communication APIs for SMS, Voice, Video, and Authentication, empowering developers to embed communication capabilities into their software applications globally.

Diversified Telecommunication Services
5K-10K
Founded 2008

Description

  • Perform manual and automated penetration testing of web applications, APIs, and mobile apps.
  • Conduct internal and external network and cloud security audits using a variety of tools.
  • Triage and validate findings from scanners and bug bounty submissions, escalating true positives and eliminating false positives.
  • Run prompt injection and jailbreak testing against AI prototypes, services, and applications using established LLM security checklists.
  • Write detailed technical reports that clearly document the path to compromise and reproducible steps for developers.
  • Maintain and update the team’s testing infrastructure, including Burp Suite and basic C2 listeners.
  • Provide remediation guidance to engineering teams for vulnerabilities such as XSS, SQLi, and IDOR.
  • Design and lead multi-week red team operations that emulate specific threat actors and test detection capabilities.
  • Develop custom payloads, droppers, and obfuscated scripts to bypass EDR/AV and maintain stealth.
  • Build automated testing frameworks for AI systems to evaluate risks such as sensitive data leakage.
  • Execute sophisticated attacks against AWS, Azure, and Kubernetes environments with a focus on IAM misconfigurations and container escapes.
  • Collaborate with SIRT and Detection Engineering to tune SIEM alerts based on engagement techniques.
  • Oversee the organization’s bug bounty program and identify trends that can drive broader architectural security changes.

Requirements

  • 7-10 years of experience in offensive security, penetration testing, AppSec, vulnerability exploitation, or high-volume bug bounty work.
  • Proven track record of finding high- and critical-severity vulnerabilities in complex environments using commercial or custom pentesting tools.
  • Expert knowledge of the MITRE ATT&CK matrix, the OWASP Top 10 for web applications, and the OWASP Top 10 for LLMs.
  • Understanding of post-exploitation techniques including lateral movement, persistence, and data exfiltration, plus adversarial ML.
  • Proficiency with tools such as Burp Suite Professional, Nmap, Metasploit, and Wireshark.
  • Experience with AI security tools such as LangChain and TensorFlow for adversarial testing.
  • Experience using C2 frameworks such as Cobalt Strike, Sliver, or Havoc, or similar tools.
  • Ability to write functional scripts in Python or Bash to automate repetitive testing tasks.
  • Proficiency in coding and scripting with Python and C++ for custom offensive exploit development that avoids signature-based detection.
  • Advanced offensive security certifications such as OSCP, OSEP, OSWE, or GXPN are highly desirable.
  • Telecom experience is preferred.
  • Excellent written and verbal communication skills.
  • Ability to influence and build effective working relationships across all levels of the organization.
  • Proficiency in multiple languages applicable to the region.

Benefits

  • Competitive pay.
  • Generous time off.
  • Ample parental leave and wellness leave.
  • Healthcare benefits.
  • Retirement savings program.
  • Remote work based in Ireland.
  • Approximately 15% travel to support in-person relationship building.
  • Volunteer and donation support to encourage community impact.

Interested in this position?

Apply directly on the company website

Apply Now

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