Taxwire
Jan 2024 - present
Founding Engineer (1st employee)
Sales tax solved: monitor, register, calculate, file, and remit on autopilot.
After seven years in AI I wanted to build systems where speed and correctness both matter. Sales tax compliance needs both, because every transaction has to compute fast and every return has to be right.
I joined as employee #1 and built the systems that run global sales tax inside finance and commerce stacks. They took the company to its first 300 customers and from $0 to $3M+ ARR.
Compute: a real-time tax calculation API in FastAPI that returns the exact tax on every transaction, plus the global nexus engine, the US sales tax engine, a geocoding service, and a multi-currency exchange layer.
Ingestion: Temporal pipelines that bring in 100M+ transactions a month from Stripe, QuickBooks, Shopify, Salesforce, Business Central, Odoo, Agree, Maxio, Measure, and Spree, plus 250+ HRIS systems through Finch. They run on webhooks and historical backfill, and a reconciliation system catches drift.
Ops: AWS infrastructure in Terraform, a Temporal-driven backfill orchestrator, an RWX-based CI/CD pipeline, and an internal Slack /deploy bot. Python, FastAPI, DuckDB, PostgreSQL, Temporal.
I onboarded our first 100 customers myself, ran integration support for the first 200, and built a certification program for customers' own API integrations.







