You will get Complete Custom Web Application Development
Top Rated
Top Rated
Project details
You receive a complete web app built from scratch. I manage everything from planning and design to development and deployment. Your website is secure, fast, and easy to manage, with clear API connections and smooth data handling.
This service is designed to meet your business needs and scale for future growth, all delivered with care and precision.
This service is designed to meet your business needs and scale for future growth, all delivered with care and precision.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, PSD to HTML, DesignWhat's included $19,000
These options are included with the project scope.
$19,000
- Delivery Time 70 days
- Number of Revisions 0
27 reviews
(22)
(3)
(2)
(0)
(0)
This project doesn't have any reviews.
ID
Iulian D.
Oct 3, 2025
Looking for an expert in Solidity to code a smart contract on EVM
AA
Ansuya A.
Sep 22, 2025
Next.js Frontend Developer with Strapi Experience Needed
MS
Mel S.
Aug 16, 2025
Next.js app enhancements and bug fixes
MA
Muaath A.
Feb 17, 2025
Next.js Upgrade and Dependency Management
Siddharth completed his job successfully, and will work with him in the future.
BT
Bakar T.
Jan 25, 2025
Expert React Developer
Siddharth is a highly skilled front-end (and also back-end) developer who is responsive and professional. It was a joy to work with him.
About Siddharth
Senior AI Engineer | LLM Apps, RAG & Agents | 12 Yrs Full-Stack
100%
Job Success
Lucknow, India - 3:46 pm local time
Top Rated Plus on Upwork — 100% Job Success across 60+ shipped projects
and 11,700+ billed hours.
I'm not an AI engineer who learned to code last year. I'm a senior
engineer who spent a decade shipping production SaaS — React, Node,
Python, Postgres, AWS — and evolved into AI because that's where the
hardest, most interesting problems are now. That foundation is why
my AI projects actually ship to production instead of dying as demos.
If you're building an AI product that needs to scale, handle real
users, integrate with real systems, and not bankrupt you on OpenAI
costs — that's the engineer you want.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
WHAT I BUILD
- Custom LLM applications — OpenAI, Anthropic Claude, open-source
models. Chatbots, copilots, document processors, classifiers,
summarization tools, content generation pipelines.
- RAG systems — retrieval-augmented generation over your private
documents, databases, or APIs. pgvector, Pinecone, Qdrant. Tuned
for accuracy, latency, and cost.
- AI agents — multi-step agents that use tools, call APIs, and
complete real work. LangChain, LangGraph, or custom orchestration
when frameworks get in the way.
- AI-powered SaaS — the full product, not just the AI piece. From
schema design to React frontend to OpenAI integration to
production deployment.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
RECENT PRODUCTION WORK
- AI Invoice Processor — automated financial data extraction at
scale. OCR + LLM pipeline. Processes thousands of invoices with
structured output and minimal human review.
- DatainsightAI — natural language interface over enterprise
analytics data. Users ask questions, AI returns charts and
insights.
- Insight AI — meeting intelligence platform. Transcription,
summarization, action item extraction, follow-up automation.
- HotSpotSEO — production SaaS with AI-generated content pipelines,
scheduled background jobs, and multi-tenant architecture.
- Visoshare — AI video summarization and transcription product.
OpenAI-powered, streaming responses, file upload pipelines.
- Healthcare research SaaS — RAG over HCP, patient, and care-
partner data. Multi-tenant on Auth0. Five product surfaces on a
shared schema.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
THE EVOLUTION
2013–2020: Backend & full-stack engineer. Production SaaS in
fintech, healthcare, e-commerce. Learned what "scale"
actually means.
2020–2023: Senior full-stack on Upwork — Next.js, React, Node,
Python, AWS. 60+ projects, 100% JSS, Top Rated Plus.
2023–today: AI engineer. Custom LLM apps, RAG systems, AI agents,
AI-powered SaaS. Same engineering rigor, applied to the
most interesting problem space in software today.
The engineering didn't change. The interface did. Today the
function call goes to OpenAI or Claude instead of just a database.
The system around it still needs to be built right — and that's
what most "AI developers" can't do.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
TECH I SHIP WITH
AI: OpenAI, Anthropic Claude, LangChain, LangGraph, pgvector,
Pinecone, Hugging Face, prompt engineering, function
calling, structured outputs, evals, streaming.
Backend: Node.js, NestJS, Python, FastAPI, PostgreSQL, MongoDB,
Redis, REST, GraphQL.
Frontend: React, Next.js (App Router), TypeScript, Tailwind,
shadcn/ui.
Infra: AWS, Vercel, Docker, Cloudflare, CI/CD.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
HOW I WORK
The first 30 minutes are free. I'll tell you honestly whether your
idea needs AI or just better software, what's actually buildable in
your budget, and where the real risks are. If we're a fit, we move
forward. If not, you've still got a clearer picture than when we
started.
I work as a senior engineer directly with you — not an account
manager handing off to a junior. You communicate with me, I write
the code, you ship the product.
Available 30+ hours/week. Comfortable working async across US, EU,
and APAC time zones.
Ready when you are.
Steps for completing your project
After purchasing the project, send requirements so Siddharth can start the project.
Delivery time starts when Siddharth receives requirements from you.
Siddharth works on your project following the steps below.
Revisions may occur after the delivery date.
Gather Requirement
Start working on the project