You will get LLM and AI Integration Into Your Web App | OpenAI and Claude API
Rising Talent
Project details
Need AI features added to your existing web app or new product? I will integrate LLMs like OpenAI and Claude API directly into your application's backend logic, not as a simple wrapper, but as a functional feature your users will actually use.
I specialize in building AI integrations that are production-ready: proper error handling, retry logic, rate limiting, and cost awareness built in from the start.
What I can build:
✔ AI chat assistants and chatbots
✔ Content generation features
✔ Smart search and semantic filtering
✔ Automated data analysis and summaries
✔ Function calling and structured outputs
✔ AI-powered form processing or document parsing
Starter covers a single, focused AI feature. Standard adds multiple features with custom logic. Advanced is for complex AI workflows with multiple models, tools, or data sources.
Not sure what you need? Describe your use case and I will tell you exactly how to approach it.
I specialize in building AI integrations that are production-ready: proper error handling, retry logic, rate limiting, and cost awareness built in from the start.
What I can build:
✔ AI chat assistants and chatbots
✔ Content generation features
✔ Smart search and semantic filtering
✔ Automated data analysis and summaries
✔ Function calling and structured outputs
✔ AI-powered form processing or document parsing
Starter covers a single, focused AI feature. Standard adds multiple features with custom logic. Advanced is for complex AI workflows with multiple models, tools, or data sources.
Not sure what you need? Describe your use case and I will tell you exactly how to approach it.
Programming Languages
PHP, Python, TypeScriptCoding Expertise
Performance OptimizationWhat's included
| Service Tiers |
Starter
$499
|
Standard
$999
|
Advanced
$1,999
|
|---|---|---|---|
| Delivery Time | 10 days | 21 days | 30 days |
Number of Revisions | 3 | 5 | Unlimited |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$150
Additional AI Feature
+$200
API Documentation
+$100
Ongoing Prompt Optimization
+$150
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RH
Riza Abdul H.
May 20, 2026
Next.js Fullstack Developer — B2B Escrow Platform Backend (MVP, Fixed Price)
He is highly trustworthy and consistently delivers excellent performance while meeting every milestone professionally and on time. Communication throughout the project was smooth, responsive, and reliable. The quality of work exceeded expectations, and the attention to detail was impressive. I would definitely hire him again for future projects and highly recommend him to anyone looking for a dependable professional.
About Fachri
Full-Stack AI Developer | Next.js & Laravel | SaaS & LLM Integration
Kudus, Indonesia - 12:42 am local time
I work across the full-stack Next.js and React on the frontend, Laravel or Node.js on the backend and I specialize in integrating AI/LLMs like OpenAI and Claude into real, production-ready applications.
I use AI-assisted tools like Claude Code and Cursor in my day-to-day workflow, which help me move efficiently while keeping the codebase clean and maintainable.
🚀 What I Build
→ SaaS platforms — multi-tenant architecture, subscription billing, admin dashboards
→ AI-powered web apps — LLM integrations built into your product, not bolted on
→ Full-stack applications — Next.js frontend, Laravel or Node.js backend, REST APIs
→ Internal tools — custom dashboards, data pipelines, role-based systems
🧠 AI Integration Into SaaS
→ OpenAI API & Claude API — chat, completions, function calling, structured outputs
→ RAG systems — vector search, knowledge base ingestion, context-augmented responses
→ AI features inside your SaaS — smart search, content generation, AI assistants
→ Production-ready — proper error handling, retries, rate limiting, token cost optimization
🔹 What I've Shipped
Sequan: B2B Escrow Platform
Next.js 14 + Prisma + PostgreSQL + Resend — full backend wired to existing 30-page frontend. Auth, wallet, document upload, email notifications, milestone-based payment flow. All 3 milestones delivered on schedule.
MyRunStory: AI Fitness SaaS
Next.js + Strava OAuth + OpenAI API + Stripe + Redis — syncs workout data automatically from Strava, analyzes performance trends, and generates personalized AI coaching for runners. Full subscription billing with Stripe.
StockBot ID: AI Stock Analyst Telegram Bot
Python + FastAPI + Claude API + ChromaDB — real-time IDX stock analysis with RAG pipeline. Scrapes Google News + Kontan, embeds article chunks, and injects context into Claude prompts for AI buy/sell signals. Candlestick charts with EMA/MACD/RSI overlays, watchlist, and price alerts.
⚙️ Tech Stack
Frontend: Next.js, React, TypeScript, Tailwind CSS, Shadcn
Backend: Laravel, Python, Node.js, Express, NestJS, Redis
Database: PostgreSQL, MySQL, Supabase, MongoDB
Auth: NextAuth, Laravel Sanctum, Clerk, Custom JWT, RBAC
Payments: Stripe subscriptions & billing, Laravel Cashier
Deploy: Docker, AWS, Vercel, Railway, Coolify
✅ What You Can Expect
→ Working SaaS MVP in weeks, not months
→ Clean, modern UI with scalable backend architecture
→ Clear milestones and honest timelines
→ A codebase that the next developer (or you) can actually understand
→ Responsive, reliable communication throughout, clients describe working with me as smooth and exceeding expectations
💬 How I Work
I ask the right questions upfront, so we both know what we're building before a single line of code is written. You'll get regular updates, honest timelines, and direct answers.
If you're a founder or team ready to build something real, send me your idea and I'll give you a straight answer on what it takes.
Steps for completing your project
After purchasing the project, send requirements so Fachri can start the project.
Delivery time starts when Fachri receives requirements from you.
Fachri works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Prompt Engineering
We discuss your specific use case. I will design the optimal system prompts and select the best LLM model (OpenAI/Claude) balancing performance and cost.
Backend Logic & API Integration
I will build the core integration into your backend with production-ready safeguards, including robust error handling, retry logic, and rate-limiting.