Senior Software Engineer, Identity Graph

ABOUT BASELAYER

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Business fraud costs the financial system billions every year, and the tools built to fight it are slow, expensive, and outdated.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

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.

WORK LOCATION

• Based in NYC or 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.
• In-person energy: We're based in NYC & SF and meet in the office 3-5 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.
• 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 🔥