Senior Software Engineer – Identity Graph & APIs (Hybrid SF)

Baselayer; San Francisco (CA); Hybrid; USD 230,000 - 340,000; Full time

Benefits offered by this job

Flexible PTO

Office in SF (4 days in office)

Competitive compensation + equity

Career growth

Health, dental, and vision covered

401(k) with company match

HSA contributions included

Gym stipend

Lunch stipend

Transparent culture

Job summary

Baselayer is building the most comprehensive identity graph of US businesses and consumers. We ingest public records, normalize data, and expose scalable APIs for search, lookups, and monitoring.

You’ll own product features end-to-end across ingestion, entity resolution, and API surface to support fraud detection, KYB onboarding, and sanctions screening. Based in SF with a hybrid office model, we offer strong compensation and equity.

Qualifications

• Strong async Python with experience running async services at scale.
• Deep PostgreSQL expertise: schema design under live load, EXPLAIN ANALYZE, zero-downtime migration tooling.
• FastAPI (or close equivalent): shipped real APIs with auth dependencies, OpenAPI contracts, and structured response models.
• Built multi-tenant APIs with access control load-bearing at the data layer.

Responsibilities

• Ingest and normalize heterogeneous public records into the graph, owning the full pipeline: ingestion to normalizer to repository to API surface.
• Build and maintain entity resolution and linking systems - matching the same business or person across sources where keys don't line up, names are misspelled, and addresses are formatted six different ways.
• Design and ship customer-facing APIs for search, lookup, monitoring, and webhook delivery - built for engineers who'll be live in production within a day of signing up.
• Own schema design and zero-downtime migrations on a database hot 24/7.
• Optimize performance and scale: query patterns for 10x volume, ingestion pipelines that finish before the next batch arrives, API latencies that don't drift as the graph deepens.
• Build multi-tenancy and access control: every query in the system scoped by org/user/permission at the data layer.

Skills

Async Python

PostgreSQL

FastAPI

Multi-tenant APIs

OpenAPI contracts

Tools

OpenAPI

PostgreSQL tooling

Job description

Baselayer is building the most comprehensive identity graph of US businesses and consumers. We ingest public records, normalize data, and expose scalable APIs for search, lookups, and monitoring.

You’ll own product features end-to-end across ingestion, entity resolution, and API surface to support fraud detection, KYB onboarding, and sanctions screening. Based in SF with a hybrid office model, we offer strong compensation and equity.