Engineering Intern, Product Security

Illumio; Sunnyvale (CA); On-site; USD 34,000 - 44,000; Part time

Job summary

Illumio, a leader in ransomware and breach containment, offers a 12-week Product Security Internship in Sunnyvale, CA. You will join the product security team to review code securely, triage vulnerabilities, and build automation while gaining real-world exposure to Illumio’s platform and secure SDLC practices.

You must be enrolled in a BS/MS program in CS/SE/Cybersecurity with graduation expected Winter 2026/Spring 2027 and have experience with Python, Ruby, Go, or C++. On-site 4 days a week.

Qualifications

• Currently enrolled in a full-time Bachelor's or Master’s degree program in Computer Science, Software Engineering, Cybersecurity or a related field with an expected graduation date in Winter 2026/Spring 2027.
• Coursework or project experience in secure coding, application security, or network security.
• Familiarity with at least one programming language (e.g., Python, Ruby, Go, C++).
• Ability to work independently and as part of a team; strong communication skills.

Responsibilities

• Assist in secure code reviews and vulnerability triage.
• Develop security automation scripts and tools to streamline detection.
• Research emerging threats and mitigation strategies relevant to Illumio’s stack.
• Participate in threat modeling alongside experienced security engineers.
• Contribute to internal security documentation and best practices.

Skills

Secure coding

Vulnerability management

Automation scripting

Threat modeling

Team collaboration

Strong communication

Education

Bachelor's or Master's in CS/SE/Cybersecurity

Tools

Python

Go

Ruby

C++

Job description

Onwards Together!

Illumio is the leader in ransomware and breach containment, redefining how organizations contain cyberattacks and enable operational resilience.Powered by the Illumio AI Security Graph, our breach containment platform identifies and contains threats across hybrid multi-cloud environments – stopping the spread of attacks before they become disasters.

Recognized as a Leader in the Forrester Wave™ for Microsegmentation, Illumio enables Zero Trust, strengthening cyber resilience for the infrastructure, systems, and organizations that keep the world running.

This is a 12 week internship program beginning on May 24th 2027 or June 21st 2027

Location: 4 on-site days a week in Sunnyvale, CA Headquarters.

Our Team's Vision:

At Illumio, the Office of the CTO and Security helps shape the company’s strategic technical direction while advancing the security of Illumio and our customers. Illumio’s Product Security team ensures our products are secure by design and resilient against evolving threats, helping protect some of the world’s most critical infrastructure. Those who join us partner with Engineering and Product Management to build security into how our products are designed, developed, and delivered.

As a Product Security Intern, you will help secure our products through a combination of secure code review, vulnerability triage, research, and automation. You’ll work alongside experienced security engineers, gain real-world exposure to Illumio’s platform, and learn how security is embedded throughout the software development lifecycle (SDLC).

Your Impact:

• Gain in-depth knowledge of Illumio’s platform and how product security protects it from design through release
• Learn how vulnerabilities are identified, triaged, and remediated using findings from static and dynamic analysis tools, penetration tests, and bug bounty programs
• Participate in secure code reviews and threat modeling alongside experienced security engineers
• Help build security automation scripts and tools that streamline vulnerability detection and triage
• Research emerging threats, attack vectors, and mitigation strategies relevant to Illumio’s technology stack
• Contribute to internal security documentation, such as best practices and remediation guides, and help promote secure coding practices across engineering teams

Your Toolkit:

• Currently enrolled in a full-time Bachelor’s or Master’s degree program in Computer Science, Software Engineering, Cybersecurity or a related field with an expected graduation date in Winter 2026/Spring 2027
• Coursework or project experience in areas such as secure coding, application security, or network security
• Familiarity with at least one programming language (e.g., Python, Ruby, Go, C++); scripting experience is a plus
• Strong interest in application security, vulnerability management, and secure software development
• Basic understanding of common vulnerabilities (e.g., OWASP Top 10) is a plus.
• Ability to work independently and as part of a team
• Strong communication and interpersonal skills
• A passion for learning and continuous improvement

What You’ll Gain:

• Hands-on experience with real-world product security challenges at Illumio
• Exposure to modern security tools, including SAST, DAST, and dependency scanners, and secure development practices
• Insight into how vulnerability management, threat modeling, and secure code review work in practice
• Mentorship from experienced security engineers and technical leaders
• A deeper understanding of how security is embedded into the software development lifecycle
• A supportive and inclusive environment that values curiosity, ownership, and continuous learning

#LI-PO1 #LI-ONSITE

Our Commitment

Illumio believes that an environment of unique backgrounds, experiences, viewpoints, and individual contributions creates a culture of belonging, drives our future, and makes us stronger together in support of our customers and their success.

All official job offers from our company are extended directly by our recruitment team and will be sent through an official E-Signature document for your review and signature. Please be aware that we do not ask for any personal information in the process of extending offers of employment, such as financial details or social security numbers. Upon acceptance of any offer, we will request such information as part of the onboarding process prior to or on your first day of employment, and only after completing a background check through an authorized third-party vendor. If you receive any communication asking for personal details outside of these processes, please contact us immediately to verify the authenticity of the request. Your security is important to us, and we are committed to a safe and transparent hiring experience.

For roles in San Francisco and Los Angeles: Pursuant to the San Francisco Fair Chance Ordinance and the Los Angeles Fair Chance Initiative for Hiring, Illumio will consider for employment qualified applicants with arrest and conviction records.