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Senior Engineer, Offensive Security

1 month, 1 week ago
India
Full-time
Mid Level
Penetration Tester
Cybersecurity
Android AWS Azure Bash Burp Suite C++ iOS Kubernetes Metasploit Network Security Nmap Penetration Testing Python SIEM TensorFlow Wireshark
Apply Now
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
View All Jobs 146

Description

  • Perform manual and automated penetration testing of web applications, APIs, and mobile applications.
  • Conduct internal and external network and cloud security assessments.
  • Triage and validate findings from scanners and bug bounty submissions, escalating true positives and removing false positives.
  • Perform prompt injection and jailbreak testing against AI prototypes, services, and applications.
  • Write clear technical reports that document attack paths and reproducible proof of compromise.
  • Maintain and update the team’s testing infrastructure and offensive security tooling.
  • 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.
  • Build custom payloads, droppers, and obfuscated scripts to bypass detection and maintain stealth.
  • Develop automated testing frameworks for AI systems and collaborate with security teams to tune detections based on engagement findings.

Requirements

  • 3–5 years of experience in offensive security, penetration testing, or high-volume bug bounty work.
  • Proven track record of finding high or critical vulnerabilities in complex environments.
  • Strong understanding of the MITRE ATT&CK matrix and the OWASP Top 10 for web applications and LLMs.
  • Knowledge of post-exploitation techniques including lateral movement, persistence, and data exfiltration.
  • Understanding of adversarial machine learning concepts.
  • Proficiency with Burp Suite Professional, Nmap, Metasploit, Wireshark, and C2 frameworks such as Cobalt Strike, Sliver, or Havoc.
  • Experience with AI security tools and libraries such as LangChain and TensorFlow for adversarial testing.
  • Ability to write functional scripts in Python or Bash to automate testing tasks.
  • Proficiency in Python, C++, and scripting for custom offensive tooling.
  • Advanced certifications such as OSCP, OSEP, OSWE, or GXPN, or equivalent experience.
  • Telecom expertise is preferred.
  • Must be able to work remotely from India, specifically in Karnataka, Tamil Nadu, Telangana, Maharashtra, or Delhi.
  • Occasional travel may be required for project or team in-person meetings.

Benefits

  • Competitive pay.
  • Generous time off.
  • Parental leave and wellness leave.
  • Healthcare coverage.
  • Retirement savings program.
  • Remote-first work environment.
  • Opportunities to support volunteering and donation efforts.

Interested in this position?

Apply directly on the company website

Apply Now

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