Thinking Machines

Software Engineer, Security

San Francisco

Security & IT

ABOUT THINKING MACHINES

The mission of Thinking Machines is to build AI that extends human will and judgment. We are training frontier models with Inkling, developing Tinker to let people make models their own, and crafting interfaces that broaden human-AI communication. We believe the future worth building is human, and we're hiring people who want to build it.

ABOUT THE ROLE

We’re looking for a software engineer focused on making our products secure by default while supporting fast and ambitious product iteration. You’ll embed with product and research teams to bake security into design and development and to build tooling and automation that keep systems safe at scale.

WHAT YOU’LL DO

  • Partner with product and research teams to embed security into the development lifecycle: threat modeling, design reviews, and secure defaults for new features.
  • Design and implement security controls across our product stack (authentication, authorization, session management, input validation, etc.).
  • Build and maintain security tooling and automation for engineers: secure frameworks and templates, CI/CD checks, dependency management, and vulnerability detection.
  • Collaborate with researchers to identify and mitigate AI-specific product risks, such as model abuse, prompt injection, data leakage, or misuse of capabilities.
  • Improve observability and detection for security-relevant events: access anomalies, abuse patterns, and suspicious behavior in production.

SKILLS AND QUALIFICATIONS

Minimum qualifications

  • Bachelor’s degree or equivalent experience
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