ABOUT THE TEAMWe're solving real-time entity resolution at a scale no one else has cracked - fusing dozens of data sources into a single business identity graph and resolving any entity in milliseconds. It's a graph AI problem, a retrieval problem, and a fraud-modeling problem stacked on top of each other. The technical depth is real.
You'd be joining a small team where the data moat is defensible, the research problems are open, and the infrastructure you build becomes load-bearing for businesses. Ownership is real. Velocity is real. There's no layer of process between an idea and shipping it.
We're at an inflection point - the graph is built, the match rates speak for themselves, and the hardest problems are still ahead: graph embeddings, fraud propagation models across the business network, real-time traversal at sub-100ms latency, and expanding the identity layer beyond finance into every platform that needs to trust a business.
If you want to work on something foundational - the kind of infrastructure that gets built once, and everything else runs on top of - this is it.
ABOUT THE ROLEBaselayer 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 SF; hybrid 4 days per week in office.
COMPENSATION- Salary Range: $230k - $340k + Equity
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
