Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I’m a senior full-stack developer with 15+ years of experience building scalable, production-ready software. In my free time I work as a freelancer while also developing my own SaaS products, which means I understand both the technical execution and the business side of shipping real-world applications. My most recent project is an AI-powered Writing Assessment SaaS platform, built end-to-end with subscription billing and AI agent integration. It closely matches projects that require AI, SaaS architecture, and payment integration. Highlights: ✅ Built an AI Writing Assessment SaaS with AI agent integration ✅ Integrated Stripe subscriptions (billing, plans, usage control) ✅ Designed and implemented full-stack architecture (frontend + backend + cloud) ✅ 15+ years of experience delivering scalable, maintainable systems ✅ Strong expertise in AI-assisted development to ship faster without sacrificing quality ✅ Experienced freelancer with real product ownership mindset I don’t just write code — I design practical, end-to-end solutions that are clean, scalable, and ready for production.…I’m a senior full-stack developer with 15+ years of experience building scalable, production-ready software. In my free time I work as a freelancer while also developing my own SaaS products, which means I understand both the technical execution and the business side of shipping real-world applications. My most recent project is an AI-powered Writing Assessment SaaS platform, built end-to-end with subscription billing and AI agent integration. It closely matches projects that require AI, SaaS architecture, and payment integration. Highlights: ✅ Built an AI Writing Assessment SaaS with AI agent integration ✅ Integrated Stripe subscriptions (billing, plans, usage control) ✅ Designed and implemented full-stack architecture (frontend + backend + cloud) ✅ 15+ years of experience delivering scalable, maintainable systems ✅ Strong expertise in AI-assisted development to ship faster without sacrificing quality ✅ Experienced freelancer with real product ownership mindset I don’t just write code — I design practical, end-to-end solutions that are clean, scalable, and ready for production.

Dan Zhu

Front-End Developer, Full Stack Developer, Web Developer, +2





I’m a senior full-stack developer with 15+ years of experience building scalable, production-ready software. In my free time I work as a freelancer while also developing my own SaaS products, which means I understand both the technical execution and the business side of shipping real-world applications. My most recent project is an AI-powered Writing Assessment SaaS platform, built end-to-end with subscription billing and AI agent integration. It closely matches projects that require AI, SaaS architecture, and payment integration. Highlights: ✅ Built an AI Writing Assessment SaaS with AI agent integration ✅ Integrated Stripe subscriptions (billing, plans, usage control) ✅ Designed and implemented full-stack architecture (frontend + backend + cloud) ✅ 15+ years of experience delivering scalable, maintainable systems ✅ Strong expertise in AI-assisted development to ship faster without sacrificing quality ✅ Experienced freelancer with real product ownership mindset I don’t just write code — I design practical, end-to-end solutions that are clean, scalable, and ready for production.…I’m a senior full-stack developer with 15+ years of experience building scalable, production-ready software. In my free time I work as a freelancer while also developing my own SaaS products, which means I understand both the technical execution and the business side of shipping real-world applications. My most recent project is an AI-powered Writing Assessment SaaS platform, built end-to-end with subscription billing and AI agent integration. It closely matches projects that require AI, SaaS architecture, and payment integration. Highlights: ✅ Built an AI Writing Assessment SaaS with AI agent integration ✅ Integrated Stripe subscriptions (billing, plans, usage control) ✅ Designed and implemented full-stack architecture (frontend + backend + cloud) ✅ 15+ years of experience delivering scalable, maintainable systems ✅ Strong expertise in AI-assisted development to ship faster without sacrificing quality ✅ Experienced freelancer with real product ownership mindset I don’t just write code — I design practical, end-to-end solutions that are clean, scalable, and ready for production.

Available to hire

I’m a senior full-stack developer with 15+ years of experience building scalable, production-ready software. In my free time I work as a freelancer while also developing my own SaaS products, which means I understand both the technical execution and the business side of shipping real-world applications.

My most recent project is an AI-powered Writing Assessment SaaS platform, built end-to-end with subscription billing and AI agent integration. It closely matches projects that require AI, SaaS architecture, and payment integration.

Highlights:

✅ Built an AI Writing Assessment SaaS with AI agent integration
✅ Integrated Stripe subscriptions (billing, plans, usage control)
✅ Designed and implemented full-stack architecture (frontend + backend + cloud)
✅ 15+ years of experience delivering scalable, maintainable systems
✅ Strong expertise in AI-assisted development to ship faster without sacrificing quality
✅ Experienced freelancer with real product ownership mindset

I don’t just write code — I design practical, end-to-end solutions that are clean, scalable, and ready for production.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Frontend Engineer

March 1, 2022 - Present

Led the frontend team to rebuild multiple customer-facing frontend assets from Angular to React; designed React migration roadmap, tech stack, tooling and CI/CD workflow; built a shared service/component library for React and Angular apps.

Senior Fullstack Engineer at Sportsbet Ltd.

November 1, 2019 - March 1, 2022

Led frontend team to build banker/broker pricing portal; set up end-to-end tech stack for frontend development and release.

Senior Fullstack Engineer at Sportsbet Ltd.

June 1, 2018 - February 28, 2019

Delivered AWS integration solutions (Lambda, API Gateway, S3, DynamoDB, SQS, SNS); built CI/CD pipeline with CloudFormation/Jenkins; managed Terraform, Splunk, Checkmarx, SonarQube and Ansible.

Senior Engineer / Tech Lead at Agricultural Bank of China

July 1, 2008 - March 1, 2018

Built platforms in infrastructure, microservices, web and mobile apps; designed large-scale software systems and multi-platform applications; tech stack included Angular/React, ELK data visualization, Node.js/Java Spring/ASP.NET services.