Senior Software Engineer, Identity Graph

ABOUT THE ROLE

Baselayer is building the most comprehensive, accurate, and continuously-current identity graph of US businesses and consumers. Every entity, officer, address, relationship, and public record we can responsibly source - ingested, normalized, linked, and kept fresh. That graph powers fraud detection, KYB onboarding, portfolio monitoring, sanctions screening, and a growing surface of customer-facing API products. We're hiring a senior engineer to own product features across that surface end-to-end: schema design, data ingestion, entity resolution, API endpoints, scope and multi-tenancy, and performance under real customer load.

WHAT YOU'LL DO

• 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.

MINIMUM REQUIREMENTS

• Shipped product features that touched ingestion to storage to API to customer, end-to-end, in production.
• Owned a Postgres schema that real money or real decisions depended on, and stayed on top of its evolution.
• Strong async Python with experience running async services at scale.
• Deep Postgres expertise: schema design under live load, EXPLAIN ANALYZE as a reflex, zero-downtime migration tooling.
• FastAPI (or close equivalent): shipped real APIs with auth dependencies, OpenAPI contracts, and structured response models.
• Built multi-tenant APIs where access control is load-bearing and scoped correctly at the data layer.

WHAT SETS YOU APART

• Entity resolution / record linkage / fuzzy matching at scale.
• Search infrastructure - full-text, fuzzy, or vector - kept in sync 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, and ordering guarantees.
• GCP experience with Cloud Run, Cloud Tasks, Cloud SQL, and batch pipelines.

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
• In-person energy: We're based in SF and meet in the office 4 days a week
• 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 monthly 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 🔥