You will get AI Feature Integration for Your Web App
Project details
I integrate AI-powered features into existing web apps — document processing, chatbots, data extraction, content generation, and smart search. You get production-ready code, not a prototype. I build AI-assisted workflows daily for a US-based legal tech platform, and I've shipped an AI Document Analyzer that extracts structured data from any PDF in seconds (live demo in my portfolio). Whether you need one AI feature added or a full intelligent workflow, I deliver clean, tested, deployed code using Claude API, OpenAI API, Next.js, and TypeScript. Most projects are done in 1-3 weeks.
Programming Languages
JavaScript, Python, TypeScriptWhat's included
| Service Tiers |
Starter
$2,000
|
Standard
$3,500
|
Advanced
$5,000
|
|---|---|---|---|
| Delivery Time | 7 days | 14 days | 21 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 3 | 5 |
Design Customization | - | ||
Content Upload | |||
Responsive Design | - | ||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$500 - $1,000
Additional Revision
+$200
Ongoing maintenance & support
(+ 10 Days)
+$500Frequently asked questions
About Elmar
AI MVP Builder | Next.js + Claude | Founder of Live AI Product
Gingoog City, Philippines - 4:32 am local time
I'm Elmar, Fullstack Developer and AI Integration Specialist. I'm the founder of PlainDoc (plaindoc.app), a live AI-powered product built on Next.js and Claude that helps Filipino workers understand their employment contracts. I built it, shipped it, and operate it today.
That experience is what I bring to your project. Most freelancers claiming "AI integration" have built tutorials and demos. I've built, shipped, and maintained a production AI product end-to-end — auth, payments, AI orchestration, rate limiting, error handling, monitoring, support. The things that break at 3am are things I've already fixed.
What I build:
AI MVPs from zero — you have a product idea using Claude or OpenAI. I take you from concept to a deployed, paying-customer-ready MVP in 2 to 4 weeks.
AI integration into existing Next.js apps — you have a live app, want to add a Claude-powered feature without breaking anything. I ship the feature, the tests, and the monitoring.
RAG and chatbot systems — custom retrieval pipelines over your documents, knowledge bases, or product catalog. Built on Claude / OpenAI / embeddings / vector DB with the same production discipline I applied to PlainDoc.
My stack (what I reach for, why I reach for it):
Frontend + backend: Next.js (App Router, Turbopack), TypeScript strict mode, Tailwind
AI: Claude Sonnet (primary), OpenAI where needed, provider-abstracted so switching is a config change, not a rewrite
Auth: Clerk (or NextAuth if you prefer)
Database: Supabase / Postgres, Drizzle ORM
Payments: Stripe (global), PayMongo (if you serve the Philippines)
Infra: Vercel, Cloudflare R2, Upstash Redis
Monitoring: Sentry, PostHog
How I work:
Day 1 — Scoping call. We define your MVP in a single page: the user, the job to be done, the 3 features that matter, the 10 features we are cutting. Fixed scope, fixed price, fixed date.
Days 2–10 — Build. Daily async updates with screenshots. You see the product take shape. No surprises.
Days 11–14 — Polish, deploy, hand off. Production deploy, documentation, 30-minute handoff call, 14 days of bug-fix support included.
I'm a fit if you:
Have validated demand and want to ship fast, not theorize for 3 months
Care about code quality — you'll own the codebase afterward and want it maintainable
Value direct communication over management theater
I'm not a fit if you:
Want the cheapest option. I'm not it, and you'll get what you pay for.
Want someone to decide your product strategy for you. I build what you validated; I don't replace your judgment.
Need 24/7 on-call. I deliver the project, then hand off. Ongoing retainers available separately.
Next step: Send me a one-paragraph description of what you want to build, and I'll reply with (a) whether I can help, (b) ballpark timeline and price, and (c) the one question whose answer will most shape the project. If we're a fit, we book a 30-minute scoping call.
Steps for completing your project
After purchasing the project, send requirements so Elmar can start the project.
Delivery time starts when Elmar receives requirements from you.
Elmar works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Architecture Review
I review your codebase, identify integration points, and create a technical plan for the AI feature implementation
AI Integration & Development
Build the AI feature with Claude/OpenAI API, structured outputs, error handling, and custom UI components