Spencer Zhao

About

Hi, I'm Spencer.

I'm Spencer (Yunpeng) Zhao, a cofounder and engineer at CoreSpeed in San Jose, California. I work on the non-model parts of cloud agents: app authorization, connectors, tools, memory, routing, usage metering, and payments.

Recent work on Lore focuses on an easy measurement mistake: counting a retrieved record as a success before its answer-bearing evidence reaches the model. I also build complete products such as BuildLog and Fixo, and keep my early hardware projects on GitHub.

By the numbers

1,598 commits · last 12 mo
306 PRs · last 12 mo
40 public repos
2020 on GitHub since

Experience

  1. Cofounder · CoreSpeed

    Present

    Building managed app access, tools, and memory for cloud agents.

    • I own the payment gateway and work across model routing, usage metering, connectors, memory, and the public product.
    • Before the current product, we built CoreSpeed PaaS, AG0, xclaw, and Sarea. Their gateway and billing systems carried forward.

  2. Builder · Independent work

    Ongoing

    Building complete products and publishing the engineering behind them.

    • BuildLog reads commits, PRs, and releases, then drafts posts for X, LinkedIn, and Bluesky.
    • Fixo takes a mobile-mechanic workflow from diagnosis to estimate, scheduling, and Stripe payment.
    • Lore is open-source memory infrastructure on Postgres and pgvector. Its evaluations separate a parent-memory hit from answer-bearing evidence.
    • Claude Max Gateway exposes OpenAI and Anthropic API formats through the Claude Code CLI.

Education

  1. M.S., Electrical Engineering (MSEE) · University of California, Irvine

Toolbox

Languages
  • TypeScript
  • Python
  • Rust
  • Kotlin
  • C / Verilog
Frontend
  • React
  • Next.js
  • Astro
  • Tailwind
Backend & runtime
  • Cloudflare Workers
  • Hono
  • Bun
  • Node.js
  • Deno
AI & agents
  • MCP
  • Vercel AI SDK
  • AG-UI
  • Claude
  • Codex
  • Gemini
Data & payments
  • Postgres
  • pgvector
  • Drizzle
  • Supabase
  • Stripe
  • Railway

Beyond code

My early projects were hardware: a multi-function digital clock in Verilog on an FPGA and a small USB-powered lithium-battery UPS for Raspberry Pi and low-power MCUs. Both are on GitHub.

Get in touch

The fastest way to reach me is email. Copy the address, or open your mail app.

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