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Job description
Every day, financial institutions make consequential decisions about which businesses to onboard and trust, in order to grow with confidence. Baselayer exists to make those decisions faster, more accurate, and much less expensive. We offer the leading AI Risk Platform that automates merchant onboarding, underwriting, and fraud prevention for over 20% of the Financial Institutions in America. By combining authoritative government data, AI agents purpose-built for web analysis, and a network powered by millions of applications, Baselayer prevents billions of dollars in merchant fraud and credit risk and instantly automates good merchant applications.
ABOUT THE TEAM
We're a small team solving a big problem. Business fraud costs the financial system billions every year, and the tools built to fight it are slow, expensive, and outdated. We're changing that. You'd be joining a small, close-knit team where ownership is real, customer impact is immediate, and the work you ship matters from day one. We move deliberately, communicate directly, and care deeply about quality. If you want to look back in five years and know you worked on something that changed how trust works across major financial institutions, let's chat!
ABOUT THE ROLE
WHAT YOU'LL DO
Build and maintain the runtime issuer/mint: OAuth Token Exchange (RFC 8693), JWS credentials (RFC 7515/7519, SD-JWT-VC), and Merkle audit log with real-time revocation.
Own and evolve the wire format and claim registry: JWT profile, verification_level/verification_method enums, and eIDAS/NIST IAL/FATF CDD crosswalk.
Implement sub-millisecond JWS verification and Web Bot Auth signature checks (RFC 9421) at the HTTP edge for counterparty CDNs, merchants, and publisher paywalls.
Build and maintain Passport - the user's cloud-resident principal account with canonical handle, KYC/KYB record, authorized-operators list, audit feed, and authenticator binding.
Develop operator integration: embedded KYB onboarding inside first OAuth 2.0 consent, per-operator opt-in, and webhook delivery via Svix.
Work across a Python 3.13 monorepo (FastAPI, Cloud Tasks, Cloud Run, SQLModel/SQLAlchemy) and Go for performance‑critical substrate components.
MINIMUM REQUIREMENTS
Shipped systems where cryptographic correctness was load‑bearing: OAuth/OIDC IdP, token issuer, signing service, HSM‑backed signer, passkey/WebAuthn flow, or similar.
Fluent in Python and Go, or strong in one with a track record of learning the other quickly.
Reads RFCs as primary sources and holds informed opinions on JWK thumbprint canonicalization, pairwise‑sub derivation, and Signature-Input header serialization.
Deep understanding of the distinction between identity and authorization, mandate and claim, snapshot and live state.
Production experience with async Python on Postgres, including migration safety and observability.
WHAT SETS YOU APART
Verifiable credentials / SSI / DID work - especially SD-JWT-VC, OID4VC, or the W3C VC stack.
Certificate Transparency, Trillian, or similar append‑only‑log experience.
KYC/KYB pipeline experience: provider abstraction, evidence retention, eIDAS/FATF CDD level mapping, ownership‑chain resolution.
Edge/CDN engineering - Cloudflare Workers, Fastly Compute, Envoy filters, or mTLS at the edge.
Familiarity with AP2, x402, MPP, UCP, or Mastercard VI specs and how identity rides alongside mandate.
WORK LOCATION
Based in SF; hybrid 4 days per week in office.
COMPENSATION
Salary Range: $195k – $300k + Equity | 0.05% – 0.25%
BENEFITS
Time off when you need it: Flexible PTO so you can recharge without red tape.
Competitive compensation: We pay well and back it with equity. We want you to think and act like an owner.
Career rocket fuel: You'll help build the foundation of a high-growth startup, working side by side with experienced founders and team members who've done it before.
Benefits on us: We cover 100% of your health, dental, and vision premiums. No surprise deductions from your paycheck.
401(k) with company match: We match your contributions so your future self benefits too.
HSA contributions included: We contribute to your HSA on applicable plans, so your coverage works as hard as you do.
Stay healthy, stay sharp: A $250 annual gym stipend to help you bring your best self to work, and everywhere else.
A seat at the table: We believe in transparency, radical candor, and giving every team member a voice.
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Worksite address
san francisco, CA, 94199, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.