Senior Infrastructure Security Engineer

San Francisco, CA
By applying for this role, you could choose to work in the following locations:
US - Remote US
San Francisco

Who We Are

The Information Security (InfoSec) is a team of security engineers and security-focused software engineers helping ensure Twitter builds and maintains secure systems and software. We collaborate with other teams, develop tooling, advocate for the security of our users, and train engineers throughout the SDLC to ensure security is prioritized at each step of development.

What You'll Do

As a Security Engineer, you'll join a team of engineers working to reduce security risk across the company. We work collaboratively with other teams to identify risks with security impact to the company, communicate that impact to teams and management, and engineer solutions. We strive to identify recurring classes of security problems, find the underlying cause(s), and develop generalized solutions. We continually advocate for the protection of our users and teach security to engineers to empower their own efforts.

Who You Are

As a Senior Infrastructure Security Engineer, you will have both security expertise and systems engineering experience. You will have explored the trade-offs necessary for large decisions, and balancing security and team productivity. You will have modeled and identified potential risks in designs, configuration, code, or in deployed systems. You have worked with both technical and non-technical teams. You recognize that the success of building effective security solutions requires interpersonal skills just as much as technical skills. You will have experience trading the perfect solution eventually for a better solution today. You will enjoy mentoring others both on the team and across the organization, and being mentored by others. Finally, you’ll enjoy advocating security by writing, giving talks, or hosting educational sessions for developers.


You will meet multiple (but need not meet all) of the following points:

  • Undergraduate degree or equivalent (CS, engineering, social sciences, arts, etc. are all fine)
  • 5 or more years of relevant experience (other jobs, grad school, etc) in information security including topics such as infrastructure security, threat hunting and analysis, pentesting, vulnerability management, or security research.
  • Understanding of systems engineering and security challenges in large-scale systems and service architectures.
  • Knowledge of some of the following topics: vulnerability management, lifecycle management, Linux system security, identity and access management, network security, secure development practices, programming languages and compilers, cryptography, operating systems, AWS, or GCP.
  • Knowledge of one of: Python, Java, JavaScript, Scala, Go, or Ruby.

Position available as remote or based in Boston, New York, Boulder, San Francisco, or Seattle, Twitter offices.

We are committed to an inclusive and diverse Twitter. Twitter is an equal opportunity employer. We do not discriminate based on race, ethnicity, color, ancestry, national origin, religion, sex, sexual orientation, gender identity, age, disability, veteran status, genetic information, marital status or any other legally protected status.

Engineering Hiring Process

Step 1

Once your application is received, a recruiter will reach out pending your qualifications are a match for the role.

Step 2

If your background is a match, you may have 1-2 technical phone interviews or be given the chance to provide a work sample depending on the role.

Step 3

If the phone interviews go well or your work sample is strong, the final step includes interviews with 5-6 people held onsite in our office.


Personal Information

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U.S.  Equal Employment Opportunity Information  (Completion is Voluntary)

At Twitter, we have a bold aspiration to reach every person on the planet. We believe that goal is more attainable with a team that understands and represents different cultures and backgrounds and we are committed to an inclusive and diverse Twitter.

This is where you come in! Please take a few minutes to provide us with your information. You are not required to provide this information and you may select “Decline to Disclose”. Your decision to provide information (or not) will not affect your employment or opportunities at Twitter.

Twitter is an equal opportunity employer. We do not discriminate based on race, color, ethnicity, ancestry, national origin, religion, sex, gender, gender identity, gender expression, sexual orientation, age, disability, veteran status, genetic information, marital status or any legally protected status.

You can view the ‘EEO is the Law’ poster here.

Twitter does not accept any unsolicited resumes from recruiting agencies and will not pay fees associated with any such resumes. Agencies, please do not send resumes to any Twitter location, employee, or email address.

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