Browse categories
Explore
Fiverr Pro
English
$
USD
I will develop, debug, and optimize custom web and software solutions
Zeyu Y
About this gig
Need a reliable full-stack developer to build, fix, or improve your web application? I offer custom full-stack web app development and create responsive, secure, and maintainable solutions tailored to your business needs.
What I can help you with:
Custom websites, dashboards, SaaS MVPs, and web apps
Frontend development with React.js, Next.js, Vue.js, Tailwind CSS, or Bootstrap
Backend and REST API development with Node.js, Express.js, NestJS, Django, or FastAPI
Authentication, databases, admin panels, third-party APIs, and payment integration
Website bug fixing, performance optimization, testing, deployment, and maintenance
AI-powered web features when required
You will receive:
Responsive design
Clean, organized source code
Clear progress updates
Testing before delivery
Support based on the selected package
Pages, features, revisions, and delivery time depend on the selected package.
Please message me before ordering if your project includes an existing codebase, complex user roles, subscriptions, payments, real-time features, or multiple API integrations. Hosting, domain, and paid third-party service fees are not included.
Get to know Zeyu Y
Zeyu Y
FullStack Developer AI Automation Specialist
- FromChina
- Member sinceJul 2026
- Avg. response time1 hour
Languages
Chinese, English
I am a full-stack developer and AI automation specialist focused on building maintainable prototypes that connect responsive interfaces with LLM workflows. I have experience as a development intern at Xianyu, Nanwei Software, and Guangzhou Andian Technology, where I worked with Java, Python, and AI application prototypes.
FAQ
Do I need to contact you before placing an order?
Yes. Please message me before ordering so I can review your requirements, features, preferred technology, and deadline. This helps me recommend the correct package and avoid unexpected costs or delays.
What information do you need to start my project?
Please provide your project requirements, page list, required features, design files or references, preferred technology, API documentation, and hosting details. For existing projects, please also provide repository access and setup instructions.
Can you work on an existing website or codebase?
Yes. I can fix bugs, add features, improve performance, update dependencies, and maintain existing web applications. I will review the codebase first to confirm its condition, scope, price, and delivery time.
Which technologies do you work with?
I work with React.js, Next.js, Vue.js, Tailwind CSS, Bootstrap, Node.js, Express.js, NestJS, Django, FastAPI, REST APIs, and common SQL or NoSQL databases. The final stack will depend on your project requirements.
Are hosting, domain, and paid services included?
No. Domain registration, hosting plans, premium templates, paid plugins, API subscriptions, email services, and other third-party fees are not included. I can help you select and configure suitable services.
Will I receive the complete source code?
Yes. You will receive the source code created for your project after the order is completed. Standard and Premium packages also include clearer code organization and detailed comments based on the package scope.
What is included in a revision?
A revision covers reasonable changes within the original agreed requirements. New pages, features, integrations, redesigns, or changes outside the original scope are not revisions and may require an additional fee.
Can you integrate APIs and payment gateways?
Yes. I can integrate documented third-party APIs and payment gateways such as Stripe or PayPal. Please contact me first because the price and delivery time depend on authentication, webhooks, endpoints, and integration complexity.
Do you provide deployment and maintenance support?
Yes. Deployment is included when specified in the selected package. I can also provide ongoing bug fixes, dependency updates, monitoring, and minor improvements through a custom offer or maintenance service.
What counts as one page?
One page means one standard responsive screen or route with a defined layout. Complex dashboards, advanced forms, multiple user flows, payment systems, or pages with extensive backend logic may be priced as additional features.
