Staff Engineer, Offensive Security

Millions of developers around the world have used Twilio to unlock the magic of communications to improve any human experience.

Twilio

Employee count: 1001-5000

Ireland only

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As a Staff Engineer, Offensive Security, you will be responsible for performing full-stack penetration testing, internal/external network audits, and vulnerability validation. You will also be expected to design and lead multi-week Red Team operations, develop custom payloads, and build automated testing frameworks for AI systems.

Requirements

7-10 years of experience in offensive security, penetration testing, or a related field
Expert knowledge of the MITRE ATT&CK matrix and the OWASP Top 10 for web applications and top 10 for LLMs
Proficiency in OffSec popular tools like Burp Suite professional, Nmap, Metasploit, and AI security tools like LangChain, TensorFlow for adversarial testing

Benefits

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

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About the job

Apply before

May 03, 2026

Posted on

Mar 04, 2026

Hiring timezones

Ireland +/- 0 hours

Job categories

Staff Security Engineer Offensive Security Jobs Senior Offensive Security Specialist Senior Security Engineer

Skills

Red Team Operations And Payload Test Automation Framework OWASP Top 10 Burp suite Nmap Metasploit TensorFlow Adversarial Testing Security Tools Matrix Lang Chain

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About Twilio

Learn more about Twilio and their company culture.

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Millions of developers around the world have used Twilio to unlock the magic of communications to improve any human experience. Twilio has democratized communications channels like voice, text, chat, video, and email by virtualizing the world’s communications infrastructure through APIs that are simple enough for any developer to use, yet robust enough to power the world’s most demanding applications. By making communications a part of every software developer’s toolkit, Twilio is enabling innovators across every industry — from emerging leaders to the world’s largest organizations — to reinvent how companies engage with their customers.

Founded in 2008, Twilio has over 1000 employees, with headquarters in San Francisco and other offices in Atlanta, Berlin, Bogotá, Denver, Dublin, Paris, Prague, Hong Kong, Irvine, London, Madrid, Melbourne, Munich, Malmö, Mountain View, Redwood City, Munich, New York City, São Paulo, Sydney, Melbourne, Singapore, and Tallinn.

Tech stack

Learn about the tools and technologies that Twilio uses to build, market, and sell its products.

View tech stack

React Native

Node.js

Ruby on Rails

Dropwizard

JavaScript

HTML5

Java

ES6

CSS 3

Swift

26 more

Twilio employees can create an account to update this tech stack.

Employee benefits

Learn about the employee benefits and perks provided at Twilio.

View benefits

Healthcare benefits

Medical, dental, and vision insurance

Equity benefits

Employee stock purchase program (ESPP)

Retirement benefits

50% match on the first 6% of base salary

Paid parental leave

12 months paid maternity and paternity leave.

View Twilio's employee benefits

Apply now

Please let Twilio know you found this job on Himalayas. This helps us grow!

Apply now

About the job

Apply before

May 03, 2026

Posted on

Mar 04, 2026

Job type

Full Time

Experience level

Senior

Location requirements

Ireland

Hiring timezones

Ireland +/- 0 hours

Job categories

Staff Security Engineer Offensive Security Jobs Senior Offensive Security Specialist Senior Security Engineer

Skills

Red Team Operations And Payload Test Automation Framework OWASP Top 10 Burp suite Nmap Metasploit TensorFlow Adversarial Testing Security Tools Matrix Lang Chain

Browse similar jobs

Twilio

Company size

1001-5000 employees

Founded in

2008

Markets

Telecommunications Developer APIs Cloud Infrastructure SMS Voice VoIP Enterprise Software Messaging Mobile SaaS

View company profile

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