Hi, my name is

Ziwei Yang.

Full Stack Developer & Solution Architect.

Based in Madrid with 10+ years of experience building web and mobile products. Specialised in full stack development, solution architecture, and SaaS platforms. Open to freelance projects, collaborations, and new opportunities.

See my work Get in touch →

01. Skills

What I Work With

Frontend

  • ▸React
  • ▸React Native
  • ▸Vue.js
  • ▸Astro
  • ▸TypeScript
  • ▸Tailwind CSS
  • ▸Three.js
  • ▸Sass

Backend

  • ▸NestJS
  • ▸Node.js
  • ▸Express
  • ▸PHP
  • ▸CodeIgniter

Database

  • ▸PostgreSQL
  • ▸Redis
  • ▸MySQL
  • ▸Prisma
  • ▸TypeORM

Tools

  • ▸Git
  • ▸Docker
  • ▸Webpack
  • ▸Vite
  • ▸Turborepo
  • ▸Playwright

Platforms

  • ▸Salesforce Commerce Cloud
  • ▸Vercel
  • ▸Stripe
  • ▸Socket.io

02. Work

Things I've Built

Jofrie

SaaS platform for restaurant and store management. Multi-tenant system with real-time order management, analytics dashboard, CRM, QR menus, and subscription billing. Built from scratch as an independent product.

  • NestJS
  • React
  • TypeScript
  • PostgreSQL
  • Redis
  • Stripe
  • Tailwind CSS

03. Experience

Where I've Worked

Freelance Full Stack Developer

2025 – Present

Independent

Building and launching SaaS products from scratch, covering product design, architecture, and full-stack development. Taking on freelance projects across web and mobile, with a focus on clean systems, good UX, and sustainable business models.

Solution Architect & Full Stack Developer

2017 – 2025

OSF Digital

Led architecture and development of Salesforce Commerce Cloud B2C projects for international brands including Guess US, Gocco, Black Crows, and EtniaBarcelona. Responsible for technical requirements, performance analysis, third-party API integrations, and leading go-live deployments.

Front-end Developer

2017

CongRong Zhong Yi / Shrey Investments

Built three Vue.js web applications for a medical platform, including a WeChat mini-app for patient appointments and payments via WePay, a diagnostic platform, and a reception system.

Full Stack Developer

2015 – 2017

Hangzhou Shuwei

Developed an industrial management platform for tobacco factories with 3D machinery visualisation using Three.js, PHP/CodeIgniter backend, and hybrid mobile apps for iOS and Android.

04. What's Next?

Get In Touch

I'm open to new opportunities — freelance projects, collaborations, or full-time roles. Feel free to reach out.

Say Hello