Available for new work — replying within a few hours

Jiaming Cao
AI Chatbot & Automation Developer

I build custom AI chatbots on Cloudflare Workers, Python automation scripts and small internal tools — fixed scope, a clear price before I start, and the source code handed over in full. No lock-in, no monthly retainer, no proprietary platform sitting between you and your own data.

Hire me on Upwork See my Fiverr services

What I build

Four published, fixed-price services. Every one ships with source code, a README and a walkthrough.

AI Chatbot

Custom AI chatbot on Cloudflare Workers

A chat assistant embedded on your site, or an API for your app. Answers come from your content — FAQ, docs, product info — and it says “I don’t know” instead of inventing an answer. Your own API key stays in Worker secrets, never in the browser.

  • Claude / GPT / Gemini / DeepSeek / any OpenAI-compatible endpoint
  • Rate limiting, CORS and abuse protection on the Worker
  • Deploys in 1–3 days; free tier covers most small sites
From $80 · 4-day delivery View on Fiverr →
Automation

Custom AI automation script (Claude / GPT API)

The one-off jobs that shouldn’t be a job: merging and cleaning spreadsheets, rule-based classification, summarising docs and emails, scraping a site into structured output, scheduled jobs that run themselves. Python or Node.js, with a dry-run mode so you can check it before it touches real data.

  • Sheets, Gmail, Notion, Airtable and API integrations
  • Commented code you own + a guide a non-coder can follow
  • Optional serverless deploy so it runs on autopilot
From $50 View on Fiverr →
Internal Tools

Custom HR software & employee management

Employee records with your fields, role-based logins, attendance (manual, CSV or device endpoint), leave requests with an approval chain, dashboard and exportable reports. I import your current spreadsheet — no retyping.

  • Runs on your server or the cloud, with a clean backup path
  • No monthly licence — you own the code and the data
  • GPS / biometric hardware and payroll export priced separately, up front
From $50 · 3-day delivery View on Fiverr →
Developer Tooling

AI coding-assistant setup for your project

Your assistant keeps ignoring your code style, folder layout and “never commit to main” rule. I set it up so it knows your project — and I do it for whichever tool you use: Claude Code, Cursor, Codex, or anything else that reads a project context file.

  • Context file, native config folder, custom commands, permission allowlist
  • Deny-list blocks .env, secrets, git push and rm -rf
  • Works with Node, React, Python, Go, Rust, PHP and more
From $20 · 2-day delivery View on Fiverr →

Selected work

Things I built, shipped and maintained — not mockups.

Browser extension · Chrome MV3

PrivacyGuard

AI chat data-leak protection. Detects and redacts API keys, credit cards, emails and secrets before they are sent to an AI chatbot — entirely on-device, no data leaves the browser. Published on the Chrome Web Store, with a Cloudflare Worker licence API and Paddle + Resend for payment.

  • 100% local on the free path — no backend, no telemetry
  • One-click redaction with a preview of what was masked
  • Real paid order delivered
Serverless backend · Cloudflare Workers

Serverless AI backend kit

A production-ready AI backend: one Worker wiring an AI provider to your data, with KV/D1 storage and signed webhooks. Ships as a kit with the Worker, schema, migrations, seed script and README.

  • Bring your own AI key — keys stay in Worker secrets
  • Typed schema + migrations included
  • Chat widget or headless API; free tier friendly
Developer tooling · Claude Code

Project context pack

A hand-tuned setup that teaches an AI assistant your codebase — stack, commands, conventions, directory layout and safe permissions — delivered as four files you drop into the repo.

  • CLAUDE.md, .claude/settings.json, a slash command, a handoff README
  • Hooks that auto-format and lint on every edit
  • 20-minute setup, any stack

How I work

Same process whether it is a $20 setup or a $400 platform.

  1. You send one exampleA sample input and what you want out of it. Masked data is fine.
  2. I tell you honestly whether it is worth doingIf it is already good enough, I say so. If it needs a different approach, I say that too — before you pay anything.
  3. You get a recommended approach and a clear priceNo silent hourly meter. Fixed scope for fixed scope.
  4. You receive the source code, the deployment steps and the docsWritten in plain language, so you can maintain it without me.
What I will not do: I don’t lock you into a platform, and I don’t take on work I can’t deliver properly. If your task is a better fit for another approach, I’ll say so instead of going quiet on it.

Background

Where the rigour comes from.

Geospatial & data engineering

My professional background is in surveying, satellite remote sensing and data pipelines — which is where I learned to be careful with data and to write documentation other people can actually follow.

Now: AI tooling, shipped myself

I build AI tools for small teams and founders and ship them myself, end to end: scoping, building, testing, documenting and handing over.

Stack

Practicalities

Rate

$25/hr
Fixed-scope work is quoted per project instead.

Location & time

Based in Chongqing, China. Working remotely with clients in any timezone.

Languages

English (fluent) and Mandarin Chinese (native). Docs and handover videos in either.