Gusto · 12 hours ago
Senior Software Engineer, Product & AI Security
San Francisco, CA
Full-time
Hybrid
Senior Level
$186K/yr - $210K/yr
7+ years expGusto is on a mission to grow the small business economy by providing essential services like payroll and HR. They are seeking a Senior Software Engineer for their Product & AI Security team to enhance security foundations and deliver secure, reliable AI-powered features.
Enterprise SoftwareAccountingFinanceFinTechSaaSSoftwareHuman ResourcesBookkeeping and PayrollEmployee BenefitsFinancial Services
Responsibilities
Design, build, and operate authentication and authorization systems that work at Gusto scale
Strengthen core services and data protections, including access control, storage, and APIs
Detect and mitigate account takeover and other abuse, improving safety for our customers
Build security platforms and tooling that help product and AI teams move quickly and safely
Own and improve high-availability security and identity services that other teams depend on
Tackle ambiguous AI/LLM security problems from threat modeling to practical mitigations
Provide leadership in promoting security and software engineering excellence
Qualification
Required
7+ years of experience as a backend engineer, building and operating large-scale server-side services and APIs
Deep experience with authentication and authorization, such as SAML/SSO, RBAC, and ABAC
Proven track record building secure, highly available distributed systems and services
Hands-on experience with modern security tooling and practices (e.g., SAST, DAST, SIEM, SCA)
Proficiency in one or more of: Ruby, Python, Kotlin, JavaScript/TypeScript
Experience with AI tools for coding (ex: Cloud Code, Cursor, Github Copilot)
Strong collaboration skills and comfort breaking down complex, cross‑cutting security and AI problems into clear, practical solutions
Preferred
Bonus: experience with authorization platforms/policy engines (e.g., Open Policy Agent, SpiceDB) and technologies like GraphQL, gRPC, Kubernetes, Terraform, Traefik, Flask, Okta
Benefits
Health insurance
401(k)
Stock equity
Company
Gusto
Gusto is an HR and payroll platform that simplifies complex tasks, empowering businesses to focus on what matters most.
1001-5000 employees
H1B Sponsorship
Gusto has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (49)
2024 (54)
2023 (19)
2022 (37)
2021 (24)
Funding
Current Stage
Late StageTotal Funding
$746.1MKey Investors
Friends & Family CapitalT. Rowe PriceFidelity,Generation Investment Management
2023-01-28Series Unknown
2022-05-12Series E· $55M
2021-08-10Series E· $175M
Leadership Team
Josh Reeves
Head of Gusto (CEO) and Co-Founder. Building Gusto for the Long Term.
Edward Kim
Co-founder and Head of Technology
Recent News
2026-02-09
2026-01-22
2026-01-20
Company data provided by crunchbase