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$
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I will build your ai saas web app using nextjs react and openai
Charles Perez
About this gig
I will build your modern AI-powered SaaS, web app, or startup MVP using Next.js, React, Node.js, and OpenAI APIs.
With 20+ years of development experience, I specialize in fast, scalable, production-ready applications with beautiful modern UI/UX.
Some animated sites I've built recently :
https://airfastshoes-ruby.vercel.app/
https://www.viralreel.co/
https://vendex-marketing.com/
https://www.romelus3.com/ (Personal site)
What I can build for you:
- AI SaaS platforms
- OpenAI / ChatGPT integrations
- Full-stack Next.js & React apps
- Custom dashboards & admin panels
- Authentication & user systems
- Stripe subscriptions & payments
- AI image/video generation tools
- REST APIs & backend systems
- Database design (Prisma, MySQL, PostgreSQL)
- Vercel deployment & optimization
- Responsive mobile-friendly UI
Tech Stack:
Next.js, React, Node.js, TypeScript, OpenAI API, Prisma, TailwindCSS, Vercel, MySQL, PostgreSQL, PHP, JavaScript, .NET, and more.
I focus on clean code, fast communication, modern design, and rapid prototyping to help bring your idea to life quickly and professionally.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Charles Perez
Charles Perez
CEO, TheRenderCafe, Vendex AI, ViralReel
- FromEl Salvador
- Member sinceNov 2018
Languages
English, Spanish
Full-stack developer and AI builder specialized in creating web apps, SaaS, automation systems, &AI-powered tools from the ground up. Skilled in PHP, JS, Next.js, React, Node.js, MySQL/MariaDB, Postgres, Lovable, V0, Replit, APIs, and AI workflows. I’ve built production-ready platforms with auth, payments, dashboards, media gen, and automation. I focus on clean, scalable solutions and enjoy solving complex technical problems while turning ideas into fast, reliable products.
https://airfastshoes-ruby.vercel.app
https://www.viralreel.co
https://vendex-marketing.com
https://www.romelus3.com
My Portfolio
FAQ
What technologies do you use?
I primarily work with Next.js, React, Node.js, TypeScript, OpenAI APIs, Prisma, TailwindCSS, MySQL, PostgreSQL, PHP, and Vercel. I can also adapt to your preferred stack.
Can you build AI-powered applications?
Yes. I specialize in AI SaaS development including ChatGPT/OpenAI integrations, AI image generation, automation tools, AI assistants, dashboards, and custom workflows.
Do you develop full-stack applications?
Yes. I handle both frontend and backend development, including APIs, databases, authentication, payments, and deployment.
Can you deploy the project for me?
Absolutely. I can deploy your application to platforms like Vercel, DigitalOcean, VPS servers, or your preferred hosting environment.
Do you work on existing projects or only new ones?
Both. I can build projects from scratch, improve existing codebases, fix bugs, update your legacy systems, optimize performance, or add new features.
Will my web app be mobile-friendly?
Yes. All projects are designed to be fully responsive and optimized for desktop, tablet, and mobile devices.
Do you provide revisions and support?
Yes. I provide revisions based on the package selected and can also offer ongoing support and maintenance if needed.
Can you sign an NDA?
Yes. I fully respect client confidentiality and can sign NDAs when required.
