Building Systems that Ship Fastand Scale 着実に.
└ Full-stack product engineer, expanding into cloud infrastructure
EngineerTM
↓ View WorkThings I've
shipped
Production systems, open source, and side projects — built at small teams and one very large one. Each one written up in depth.
(01) — SOFTWARE ENGINEER / YIELDSTREAM / 2025
YieldStream™
An underwriting platform for MCA brokers. Replaces gut-feel lender routing with data-driven recommendations — combining a three-layer scoring model with AI enrichment and outcome-based learning.
(02) — SOFTWARE ENGINEER / LIQUID WEB INC / 2022—2025
GiveWP
The leading WordPress donation plugin, powering 100k+ nonprofits. Built and maintained fundraising forms, payment gateway integrations, and donor management features.
(03) — DOCUMENT INTELLIGENCE / FINANCIAL STATEMENT EXTRACTION
Ledger™
Production document intelligence service for bank statements and tax returns. Multi-tier parsing pipeline, 14 bank templates, 25+ risk indicators, balance reconciliation, and PII redaction — extracted from YieldStream's underwriting platform as a standalone API.
(04) — EMBEDDABLE AI CHAT / MULTI-TENANT SAAS WIDGET
BubbleChat
Embeddable AI chat with a multi-tenant FastAPI backend. Vanilla TypeScript web component (shadow DOM, zero dependencies), async SQLite/Postgres, streaming responses via SSE, and a React admin dashboard with live preview for prompts and styling.
Working across timezones
U.S. Citizen based in San Diego, comfortable collaborating from PST through JST.
London, New York, Singapore, Sydney — and elsewhere.
Family in the region — happy to work remote from Japan, Korea, or nearby.
(03) — ABOUT
Joshua.
I build systems that move money. Started at Liquid Web shipping donation infrastructure for 100k+ nonprofits, now running YieldStream — an underwriting platform replacing gut-feel decisions with actual data in an industry that's somehow still allergic to spreadsheets.
The throughline across both: find the lever no one's pulling yet, pull it carefully. Family in Japan taught me that the best craft is the kind nobody notices — systems that age well, code that doesn't draw attention to itself, problems solved once instead of patched forever.
丁寧に — with care.
Build it once. Build it right. Move on.
Open to engineering roles — full-time or contract.
Exploring opportunities(04) — CONTACT
Let's work
together.
Software Engineer open to interesting work across any industry. Open to relocation — or remote, any timezone.