Senior Software Engineer, Identity Graph
Baselayer · San Francisco, California
About this role
**Senior Software Engineer, Identity Graph** **About Baselayer** Baselayer is rebuilding the identity layer for institutions across the United States. We fuse public records, IRS data, sanctions lists, web signals, and fraud telemetry from 2,200+ financial institutions into a single graph that resolves businesses and the humans behind them in milliseconds. Trusted by 20%+ of financial institutions in America, the graph is becoming foundational infrastructure for fraud detection, KYB onboarding, and customer-facing API products—beyond finance into any platform that needs to trust a business. **About the Team** You’ll work on real-time entity resolution at scale: a graph AI + retrieval + fraud-modeling stack. The problems are open, the infrastructure you build is load-bearing, and there’s direct ownership from idea to shipping. **About the Role** Baselayer is building a comprehensive, accurate, continuously-current identity graph of US businesses and consumers. You’ll own product features end-to-end across schema design, data ingestion, entity resolution, API endpoints, scope/multi-tenancy, and performance under real customer load. **What You’ll Do** - Ingest and normalize heterogeneous public records into the graph (ingestion → normalizer → repository → API surface) - Build and maintain entity resolution/linking systems (matching across sources with inconsistent keys, names, and addresses) - Design and ship customer-facing APIs for search, lookup, monitoring, and webhook delivery - Own schema design and zero-downtime migrations on a database hot 24/7 - Optimize performance and scale (10x volume query patterns, ingestion timing, stable API latencies) - Build multi-tenancy and access control (org/user/permission scoping at the data layer) **Minimum Requirements** - Shipped end-to-end product features in production (ingestion → storage → API → customer) - Owned a Postgres schema used for real decisions and kept it evolving - Strong async Python; experience running async services at scale - Deep Postgres expertise (schema design under live load, EXPLAIN ANALYZE, zero-downtime migration tooling) - FastAPI (or close equivalent) with auth dependencies, OpenAPI contracts, and structured response models - Built multi-tenant APIs with access control that’s correctly enforced at the data layer **What Sets You Apart** - Entity resolution / record linkage / fuzzy matching at scale - Search infrastructure (full-text, fuzzy, or vector) synced with a Postgres system of record - KYC/KYB/fraud/underwriting data pipeline experience - Address parsing/normalization at country scale - Webhook delivery infrastructure (retries, signing, idempotency, ordering guarantees) - GCP experience (Cloud Run, Cloud Tasks, Cloud SQL, batch pipelines) **Work Location** - Based in SF; hybrid (4 days/week in office) **Compensation** - **$230k – $340k + Equity** **Benefits** - Flexible PTO - In-person energy: meet in the office 4 days/week - Competitive compensation with equity; think and act like an owner - 100% coverage of health, dental, and vision premiums - 401(k) with company match - HSA contributions included (on applicable plans) - $250/month gym stipend - Transparent culture with radical candor and a voice for every team member 🔥
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