3 days of real work.
$0.

• 
  AIMobile

  Venus — AI skincare diagnosis app

  MVP shipped in 4 months — live on the App Store and Google Play.

  Jun – Oct 2024 · 4 months

  Read the case study →
• 
  Mobile

  Obico — 3D printer remote monitoring app

  +30% retention after the native app launch.

  Jun – Dec 2024 · 6 months

  Read the case study →
• 
  Web3Web

  Bluez — NFT marketplace

  Multi-chain marketplace launch with near-zero-gas listings via Seaport.

  Jun 2022 – Feb 2023 · 8 months

  Read the case study →

What if you can't deliver?

You find out in 3 days, for free — from real code in your repo, not from a sales call.

100% Job Success across 43 Upwork jobs

Will you disappear mid-project?

A plan every morning, a report every evening, and replies within 4 hours in our overlapping hours. I take at most 2 clients at a time, and I stop bidding on Upwork once we commit long-term.

80% of clients hire me again · longest engagement 2+ years

Will the budget blow up?

Scope is written down before the quote. Fixed-price milestones, or hourly with a weekly cap — your call.

Hourly or fixed, on Upwork

Will I be locked in to you?

The code is in your GitHub from day one. Every project ships with a handover doc, automated tests and CI, so any engineer can take over.

Handover doc + tests + CI on every project

Is my IP safe?

IP transfers to you through the Upwork contract, and I am happy to sign an NDA. Cloud and app-store accounts stay in your name; I work with least-privilege access.

Your accounts, your IP

Who fixes bugs after launch?

Any bug in my code is fixed free for 30 days after launch. Monthly maintenance is available after that.

30-day free bug-fix window

Is it really you doing the work?

Yes. The engineer you talk to is the engineer who writes your code. No agency, no subcontracting.

One person, end to end

How fast can you ship?

I run an AI-native workflow: requirements become machine-checkable tasks, and every step leaves verification evidence. Speed without guessing about quality.

Weekly demos you can click through

• AI & LLM apps

  Claude · OpenAI · RAG · Agents · MCP

  LLM features in production: chat, document extraction, agents and evaluation.

  Typical timeline: 2–8 weeks

• Full-stack web products

  Next.js · FastAPI · Postgres

  SaaS MVPs, dashboards and admin systems, from database to deployment.

  Typical timeline: 4–12 weeks

• Mobile apps

  React Native · Flutter · Mini Programs

  iOS and Android apps shipped to the stores, with the backend they need.

  Typical timeline: 6–16 weeks

• Web3 & NFT platforms

  Wagmi · Viem · Solidity · Multi-chain

  dApps, NFT marketplaces and wallet integrations.

  Typical timeline: 4–12 weeks

1. 01

   Free 3-day trial

   Real code in your repo, with a plan every morning and a report every evening.

2. 02

   Scope & quote

   A written scope and a fixed or hourly quote — no surprises later.

3. 03

   Build with weekly demos

   One point of contact. A working demo every week.

4. 04

   Launch

   Deployed to your infrastructure, under your accounts.

5. 05

   30 days of free fixes

   Any bug in my code after launch is on me.

6. 06

   Handover

   Handover doc, automated tests and CI — any engineer can take over.

Under the hood: an AI-native workflow. Requirements become machine-checkable tasks, and every step leaves verification evidence — so moving fast never means guessing about quality.

Time zone

UTC+8 (Shanghai)

Availability

30+ hrs / week

Capacity

At most 2 clients at a time

Language

English (professional) · Chinese

Engagement

Hourly or fixed price

Project length

2 weeks – 6 months

Delivery cadence

Daily reports · weekly demos

Clients

US · EU · JP