Cofounder & CTO
Ledger App, Inc.
2026 – present
- Company: Cofounder and technical lead of an incorporated civic-tech startup (Delaware C-corp, three-cofounder team); authored roughly half of all commits and lead the AI, data, and security engineering for an assistant that answers civic questions.
- Vera agent: Built Vera, a production multi-turn LLM agent on Anthropic Claude with a closed 5-class grounded tool registry and hand-rolled SSE streaming, engineered so no user PII can reach the model by construction.
- Governance: Added governance-as-code around the model: a prompt-hash CI gate that fails closed on any neutrality-prompt edit, an 85-fixture LLM-as-judge validation harness, and multi-tier abuse enforcement.
- Data layer: Own a 70-migration Postgres/Supabase data layer with mandatory row-level security on all 23 tables (100% coverage); a pre-launch security audit found and fixed real auth-bypass, data-destruction, and privilege-escalation defects.
- Mobile trust boundary: Contributed to Ledger's public iOS companion app (live on the App Store), focused on the client trust boundary so the phone preserves the web product's provenance-enforced, no-PII-to-model guarantee: Vera served entirely from the shared backend, and a CI contract test guarding the mobile↔web API seam against drift.
- Next.js
- TypeScript
- Supabase
- Anthropic API
- Expo / React Native
- Vitest
- Playwright