You will get Claude or OpenAI API integration into your web app
Top Rated
Project details
Want to add AI to your product but not sure where to start? I integrate Claude (Anthropic) and OpenAI APIs into existing web apps and new builds — using Next.js, TypeScript, and the Vercel AI SDK for clean, production-ready AI features.
What I can build for you:
AI chat interfaces with streaming responses
Custom prompt engineering for your specific use case
Claude or GPT-powered assistants embedded in your app
Document analysis, summarization, and Q&A features
AI-driven automation and smart workflows
Tool use and function calling integrations
Tech I use:
Next.js App Router · TypeScript · Claude API · OpenAI API · Vercel AI SDK · Supabase · Tailwind CSS
Good fit for:
SaaS products adding an AI assistant or copilot feature
Internal tools that need smart automation
Startups building AI-native products
Existing apps that need an AI upgrade
📩 Describe what you want to build, and I'll tell you exactly what's possible.
What I can build for you:
AI chat interfaces with streaming responses
Custom prompt engineering for your specific use case
Claude or GPT-powered assistants embedded in your app
Document analysis, summarization, and Q&A features
AI-driven automation and smart workflows
Tool use and function calling integrations
Tech I use:
Next.js App Router · TypeScript · Claude API · OpenAI API · Vercel AI SDK · Supabase · Tailwind CSS
Good fit for:
SaaS products adding an AI assistant or copilot feature
Internal tools that need smart automation
Startups building AI-native products
Existing apps that need an AI upgrade
📩 Describe what you want to build, and I'll tell you exactly what's possible.
Programming Languages
JavaScript, TypeScriptWhat's included
| Service Tiers |
Starter
$100
|
Standard
$300
|
Advanced
$600
|
|---|---|---|---|
| Delivery Time | 4 days | 8 days | 16 days |
Number of Revisions | 2 | 3 | 5 |
Number of Pages | 1 | 3 | 3 |
Design Customization | |||
Content Upload | - | ||
Responsive Design | |||
Source Code |
4 reviews
(4)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
TK
Tim K.
Aug 18, 2026
Engineer Fault Reporting and Pre Use Check App
Fayaz was a pleasure to work with and exceptionally professional throughout the project. He followed our API contracts and wireframes precisely, and proactively flagged any issues he ran into. The goal was to build a web app that has since launched successfully. We wouldn't have hit our timelines without Fayaz's fast, reliable work. Highly recommended.
TT
TCM T.
Feb 26, 2025
Implementation of translation to the website Front end
XH
Xi H.
Sep 18, 2023
Convert Figma Design to Website with Animations
Fayaz did an excellent job converting our Figma design into a website. However, it's worth noting that he works part-time. Despite this, his technical skills and attention to detail were top-notch, resulting in a visually appealing final product. Clarifying availability expectations upfront would further enhance the experience of working with him.
BT
Ben T.
Apr 19, 2023
Complete an in-progress React project
Fayaz worked very hard on my project. He was very responsive with questions and accepted feedback well.
About Fayaz
Full Stack Developer | Next.js, React, TypeScript, Supabase, SaaS & AI
100%
Job Success
Gilgit, Pakistan - 8:35 pm local time
Top Rated Plus · 100% Job Success · 4,000+ hours · 5+ years shipping production software.
WHAT I BUILD
→ Full-Stack SaaS Applications: end-to-end web apps with Next.js (App Router), Supabase, and TypeScript. Authentication, database, APIs, and UI, production-ready from day one. Ideal for startup MVPs and internal enterprise tools.
→ AI-Powered Features: Claude API, OpenAI, and Vercel AI SDK integrations shipped into real products. Chat interfaces, AI assistants, document processing, and automated workflows (including n8n, Zapier, and Make pipelines).
→ SaaS Dashboards & Admin Panels: data-heavy interfaces for analytics platforms, CRMs, and agency tools. I've built dashboards used daily by millions of teams/users in production.
→ Real-Time & Offline-First Apps: WebSocket-driven interfaces with auto-save, live data sync, and installable Progressive Web Apps (PWAs) that keep working on unreliable connections.
→ Performance & Core Web Vitals: SSR, SSG, ISR, Server Actions, and Edge Functions. I optimize Next.js apps for fast load times, SEO, and passing Core Web Vitals.
RECENT WORK
1. OPTIC360 (UK fleet operator): tablet-first PWA that replaced paper vehicle inspections end-to-end. Interactive SVG damage diagrams, S3 photo uploads, live vehicle maps, WebSocket auto-save, white-label branding per fleet client. Delivered offline-ready and UAT-passed.
2. Webeyez: real-time SaaS analytics platform for e-commerce revenue monitoring. Built the dashboard architecture and SSR strategy serving multiple enterprise customers.
3. Mainboard (Portfoliopad / Castingpad): talent management platforms for fashion and creative agencies. Component systems and GraphQL-driven UI used by agencies in multiple countries.
HOW I WORK
✔ Senior-level ownership: I scope, architect, build, and ship. Minimal hand-holding needed.
✔ Clean, maintainable code: component systems and typed codebases your next developer can pick up without a translator.
✔ Reliable communication: you always know status, blockers, and what ships next.
✔ Long-term partnerships: most of my 4,000+ Upwork hours come from multi-year engagements, not one-off gigs.
STACK
Next.js 14/15 · React 19 · TypeScript · Supabase · PostgreSQL · Tailwind CSS · shadcn/ui · Zustand · GraphQL · REST · Socket. io · Claude API · OpenAI · Vercel AI SDK · Vercel · CI/CD · Jest
If you're building a SaaS product, migrating to Next.js, or adding AI features to an existing app, send me an invite or message with a line about your project and I'll reply with how I'd approach it.
Steps for completing your project
After purchasing the project, send requirements so Fayaz can start the project.
Delivery time starts when Fayaz receives requirements from you.
Fayaz works on your project following the steps below.
Revisions may occur after the delivery date.
Scope & prompt design
Understand your use case, design the prompt architecture, and confirm the AI behavior and expected outputs.
API setup & backend
Set up the AI API connection, streaming configuration, and server-side route handling securely.