Thinking Machines Lab
Software Engineer, Security
San Francisco
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odds of building a lasting career here
Sponsors, but it's cap-subject — you still face the weighted lottery (~61% per draw at Level IV). Good if you win; have a cap-exempt backup on your list.
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the lottery is wage-weighted — each level is one more entry
This range already reaches Level IV — the maximum four lottery entries.
DOL prevailing wage, 2026-27 wage year · Software Developers (15-1252) · San Francisco-Oakland-Fremont, CA. Wage level is derived by USCIS from the offered wage, occupation and worksite; the occupation shown is inferred from the job title.
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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.
- Note: This is an "evergreen role" that we keep open on an on-going basis to express interest.
- We receive many applications, and there may not always be an immediate role that aligns perfectly with your experience and skills.
Responsibilities
- 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.
Requirements
- Bachelor's degree or equivalent experience in computer science, engineering, or similar.
- Proficiency in at least one backend language (we use Python or Rust).
- Strong generalist software engineering background and ability to review production code for security risks.
- Familiarity with common vulnerability classes and prevention frameworks
- experience hardening prototypes into production.
- Comfort with modern cloud infrastructure and understanding how application concerns intersect with infrastructure.
- Comfort operating across the stack and owning projects end-to-end.
- Experience securing AI‑powered products or working with ML/LLM APIs and their unique threat models.
Nice to have
- we encourage you to apply if you meet some but not all of these:
Compensation
- Depending on background, skills and experience, the expected annual salary range for this position is $300,000 - $350,000 USD.
Benefits
- Thinking Machines offers generous health, dental, and vision benefits, unlimited PTO, paid parental leave, and relocation support as needed.
Company info
- 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.
- The mission of Thinking Machines is to build AI that extends human will and judgment.
Visa & Work Authorization
- We sponsor visas.
- While we can't guarantee success for every candidate or role, if you're the right fit, we're committed to working through the visa process together.
This listing is sourced directly from Thinking Machines Lab's careers page and normalized into a canonical job model.