About the role
Make secure design the default across identity, context, model, tool, and execution paths.
A software-capable product security engineer with authorization, SaaS, and adversarial testing experience.
What you’ll do
- Lead threat models and code reviews
- Build secure-by-default libraries and checks
- Drive remediation and security learning
What we’re looking for
- Experience turning security requirements into practical product or operating controls
- Sound judgment across threat modeling, incident response, assurance, or enterprise risk
- The ability to work directly with engineers and customers without losing precision
About S/Runtime
S/Runtime is an early-stage enterprise software company building a controlled execution layer for agents. The product is designed to preserve identity and source permissions, pause consequential actions for review, and retain evidence from each run.
The early team will work directly with design partners and across traditional product boundaries. We value clear decisions, careful testing, and people who can stay close to both the technical system and the customer problem.
Location and employment
San Francisco or US remote. This role is expected to be full-time. Exact workplace expectations, compensation, benefits, work authorization, and employing entity will be published before applications open.
Candidate information
S/Runtime intends to provide an accessible and equitable hiring process. Formal openings will include applicant privacy, accommodation, and equal employment opportunity information appropriate to the hiring location.