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Character AI
Senior Infrastructure Security Engineer - AI Startup
Palo Alto


About us

Character’s mission is to empower everyone with AGI. Our vision is to enable people with our technology so that they can use Character.AI any moment of any day.

Achieving our mission will require solving ambitious technical challenges, including engineering, research, and design, and we are assembling a world-class team to do so. Our founding team includes AI pioneers from Google Brain and Meta Research whose research has led to major breakthroughs in natural language understanding and dialog applications such as Transformers and Google LaMDA.

Check out our beta to get a glimpse into the future.

About the Role


As a founding member of our Infrastructure Security team, you will be responsible for leading broad-scope initiatives to harden our infrastructure against sophisticated threat actors. Design and implement the core infrastructure that supports our applications, services, and large language model training and inference pipelines at scale. Our infrastructure is home to some of the most valuable intellectual property in the world - including some of the largest language models to be found anywhere - and it will be your responsibility to ensure our systems operate reliably and securely in the presence of malicious adversaries.

Job responsibilities may include:

  • Envisioning, designing, and implementing hardened infrastructure

  • Ensuring our Kubernetes clusters are configured to prevent unauthorized access

  • Hardening our cloud compute environments

  • Designing workflows and developing tooling that enables developers to securely utilize our infrastructure while maintaining velocity

  • Implement secure build artifact handling and deployment flows

  • Integrate CI/CD pipelines with infrastructure to automate and secure deployments


Competitive candidates will have:

  • At least 5 years of experience with infrastructure security

  • Experience working with Kubernetes and Docker

  • Familiarity with cloud environments such as GCP or AWS

  • Ability to understand and contribute code to complex codebases

  • Familiarity with various SSH key management approaches

  • Deep understanding of service mesh technologies such as Istio, linkerd, or GCP Anthos

  • Understanding of common CI/CD-based workflows

  • Proficiency in Linux-based server environments with a high degree of comfort on the Linux CLI

  • Experience architecting secure system designs to meet product requirements at scale

  • Familiarity with zero trust concepts

  • A demonstrated ability to work autonomously to identify and resolve problems independently

Outstanding candidates will have one or more of the following:

  • Experience with common web application and web service design patterns

  • Familiarity with Helm for managing Kubernetes deployments

  • Previous experience in a technology startup

You will be a good fit if you are proactive and have a “get things done” mindset. Given our current pace of growth and load on our systems, most people have had a significant impact during their first week at the company.

Character is an equal opportunity employer and does not discriminate on the basis of race, religion, national origin, gender, sexual orientation, age, veteran status, disability or any other legally protected status. We value diversity and encourage applicants from a range of backgrounds to apply.

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