You will get AI & LLM capabilities into your Web Application using Next.js | Python
Project details
Leverage AI to Transform Your Business
I integrate advanced AI capabilities into modern web applications using Next.js, TypeScript, and the Vercel AI SDK. From simple chatbots to complex RAG (Retrieval-Augmented Generation) systems, I build intelligent features that actually work.
My Expertise Includes:
AI Chatbots & Assistants: Custom-trained on your business data.
RAG Implementation: Allowing users to "chat" with your PDFs, documents, or knowledge base.
Vector Search Integration: Setting up Pinecone, Supabase Vector, or MongoDB for high-speed AI retrieval.
AI Workflow Automation: Using agents to automate repetitive tasks or generate structured content.
Why Choose This Service?
Streaming UI: Fast, real-time responses like ChatGPT.
Type-Safe Code: Built with TypeScript for long-term stability.
Scalable Backend: Optimized API calls to keep your costs under control.
I work with leading models like GPT-4o, Claude 3.5 Sonnet, and Gemini Pro.
Note: Please message me before ordering for a custom quote if your project requires complex multi-step AI agents or large-scale data migrations.
I integrate advanced AI capabilities into modern web applications using Next.js, TypeScript, and the Vercel AI SDK. From simple chatbots to complex RAG (Retrieval-Augmented Generation) systems, I build intelligent features that actually work.
My Expertise Includes:
AI Chatbots & Assistants: Custom-trained on your business data.
RAG Implementation: Allowing users to "chat" with your PDFs, documents, or knowledge base.
Vector Search Integration: Setting up Pinecone, Supabase Vector, or MongoDB for high-speed AI retrieval.
AI Workflow Automation: Using agents to automate repetitive tasks or generate structured content.
Why Choose This Service?
Streaming UI: Fast, real-time responses like ChatGPT.
Type-Safe Code: Built with TypeScript for long-term stability.
Scalable Backend: Optimized API calls to keep your costs under control.
I work with leading models like GPT-4o, Claude 3.5 Sonnet, and Gemini Pro.
Note: Please message me before ordering for a custom quote if your project requires complex multi-step AI agents or large-scale data migrations.
Programming Languages
HTML & CSS, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$50
|
Standard
$400
|
Advanced
$3,500
|
|---|---|---|---|
| Delivery Time | 1 day | 10 days | 30 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | - | ||
Content Upload | - | ||
Responsive Design | |||
Source Code |
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FR
Frank R.
Feb 14, 2025
Developer Needed to Build Custom Underwriting Portal for Loan Applications
About Serhii
Fullstack Developer | React | Node.js | Next.js | NestJS | Python | AI
Altena, Germany - 12:24 pm local time
I help startups and businesses build SaaS platforms, MVPs, and scalable web applications using React, Next.js, Node.js, and Python.
Over the last 6+ years I've delivered 50+ projects including SaaS platforms, startup MVPs, and full stack web applications used by thousands of active users.
My focus is building production-ready systems - not just prototypes - that scale from MVP to real products handling hundreds of thousands of API requests.
As a React Developer, Next.js Developer, Full Stack Developer, and Python Developer, I build scalable SaaS MVPs, React dashboards, and full stack applications launching in 3–6 weeks, supporting 10K+ users and handling real production workloads.
React & Next.js Development
As a React Developer, React Web Developer, and Next.js Developer, I build modern React web applications, Next.js platforms, SaaS dashboards, and scalable frontend systems.
As a frontend react engineer, I leverage React.js, Next.js Tailwind, and TypeScript to create fluid SPAs and SSR applications. My next.js SEO configurations and next.js Vercel deployments ensure fast, indexable, production-ready frontends.
Across several React and Next.js platforms, I improved frontend performance significantly - reducing page load time by 50–70%, increasing Lighthouse scores to 90+, and reducing bundle sizes by 40%+. Multiple React applications I built use scalable component systems across 50+ pages, supporting thousands of daily users.
As a frontend developer and front end developer, I handle full Figma-to-React implementation - pixel-perfect, responsive, and accessible across all devices. Whether you need a frontend designer to translate a design into code, or a frontend engineer to architect a scalable component system - I deliver both.
My nextjs TypeScript setups and nextjs Tailwind component libraries help teams ship faster without sacrificing code quality.
Full Stack SaaS Development
As a Full Stack Developer and React Node Full Stack Developer, I design and build scalable SaaS platforms, startup MVPs, and production web applications combining React frontend architecture with Node.js and Python backend services.
As a fullstack developer and full stack web developer, I regularly build React SaaS platforms, admin dashboards, analytics tools, and internal systems processing thousands of daily events.
Several SaaS platforms I developed as a Full Stack Developer now support 10K–50K users, process 300K+ API requests monthly, and maintain 99.9% uptime.
My stack as a Full Stack Developer React Node includes React, Next.js, Node.js, NestJS, PostgreSQL, MongoDB, Redis, and TypeScript - helping teams reduce infrastructure overhead by 25–40%.
Backend & Node.js Development
As a Node.js Developer, backend developer, and JavaScript developer, I design backend systems powering SaaS platforms, MVP products, and modern web applications.
Several backend systems I developed process 300K–500K API requests monthly, maintain 99.9% uptime, and support high-traffic React and Next.js applications.
My Node.js developer experience includes building REST APIs, GraphQL services, WebSocket systems, and event-driven microservices. As a backend developer and node.js developer, I work with Node.js, NestJS, Express, PostgreSQL, MySQL, MongoDB, and Redis.
Database optimizations improved response time by 3–5x and reduced latency by 40–60%.
Python Development
As a Python Developer and Python Full Stack Developer, I build high-performance backend services, automation pipelines, and AI-powered systems using Python, FastAPI, and Django.
As a phyton developer (and yes - I know it's spelled Python 🙂), I regularly help clients who search for phyton, pyton developer, or python developer - I handle all of it.
My Python developer experience includes building data pipelines, REST APIs, AI integrations, web scraping systems, and automation tools. As a python full stack developer, I combine Python backends with React or Next.js frontends for complete end-to-end delivery.
Python data analysis, data science workflows, and data analyst tasks are part of my regular project scope - from pandas pipelines to dashboard integrations.
What I can help you with
⚛️ React web applications · React dashboards · Frontend React development
🔷 Next.js Developer tasks · Next.js Tailwind · Next.js SEO · Next.js Vercel
🧠 Full Stack SaaS platforms · MERN Stack · Full Stack Developer React Node
🐍 Python Developer · FastAPI · Django · Data Science · Automation
🔌 Node.js Developer · Backend Developer · REST API · GraphQL
If you need a React Developer, Next.js Developer, Full Stack Developer, Python Developer, or Node.js Developer - I'd love to help you build something great.
🚀 Click "Invite" or "Hire" and let's build your product.
Last update: 16.06.2026
Steps for completing your project
After purchasing the project, send requirements so Serhii can start the project.
Delivery time starts when Serhii receives requirements from you.
Serhii works on your project following the steps below.
Revisions may occur after the delivery date.
AI Analysis & Strategy
We define the best model and prompt engineering approach for your specific needs.
Infrastructure Setup
Configuring API connections and Vector databases (for RAG systems).