Gaurav Singh Karki — Full-Stack Developer

Full-Stack Developer

I turn complex ideas into software that ships and scales.

Web, mobile, AI — design to deployment. 30+ products in production, from SaaS and payment systems to AI platforms.

View work
01

About

5+

Years experience

30+

Products in production

12

Happy clients

Full profile, services & track record
02

Selected Work

MomentoCard cover
SaaS · Consumer · 2026

MomentoCard

A festival-driven 3D greeting card SaaS, built for India's WhatsApp-first audience.

JARVIS RCSA cover
Enterprise AI · FinTech · 2026

JARVIS RCSA

An enterprise AI platform that automates Risk & Control Self-Assessment for banks.

CloudPlaza cover
SaaS · Security · 2026

CloudPlaza

Zero-knowledge encrypted cloud storage — a Proton Drive alternative.

View all my work
03

Experience

Co-Founder & Director

Cosmo Clan

Co-founded and lead a product studio, driving direction across engineering, product, and client delivery.

Mar 2025 — PresentAlmora, India · Remote

Software Engineer

GLiN Softwares Pvt. Ltd

Full-stack developer building scalable web platforms, CRMs, SaaS products, and AI-powered solutions for global clients.

May 2023 — Dec 2025Chandigarh, India · Hybrid

Software Engineer

Max Ads Media

Worked remotely on high-conversion marketing platforms and landing-page systems for performance-driven campaigns.

May 2023 — Jun 2025United States · Remote
04

Capabilities

Frontend

Next.jsReactTypeScriptTailwind CSSshadcn/uiFramer MotionTanStack QueryPWA

Backend

Node.jsExpressLaravelPHPPythonFlaskFastAPIREST APIs

Database & ORM

PostgreSQLMySQLPrismaSupabaseRedis

AI / LLM

Anthropic ClaudeOpenAILLM Tool-use

Auth & Security

NextAuthJWTEncryption (AES-GCM)Multi-Tenant Isolation

Payments & Billing

StripeRazorpayAdyenPayPalSubscriptions & Webhooks

Cloud, Infra & Deployment

VercelRailwayAWSAzureDockerNginxVPS / LinuxCI/CD (GitHub Actions)

Tooling & Testing

Git / GitHubAutomation ScriptingTesting & DebuggingSwagger / OpenAPIAnalytics (GA4)
05

Upwork

100%

Job success

10

Total jobs

1,442

Total hours

5.0

Avg. rating

Mar 2026

Full-Stack AI Engineer for RAG Chatbot Development

“I had a great experience working with this developer on our RAG chatbot project. From the very beginning, they demonstrated strong expertise in full-stack development and a deep understanding of…”See more

Fixed price
Feb 2026

Security/Scalability expert to review and improve my project

“Was great! Very professional, efficient and quick responses. Took care of conducting a security audit and implementing fixes, thanks Gaurav!”

Fixed price
Dec 2025

Full-Stack Developer for Advanced AI RAG System with Next.js & FastAPI

“Gaurav is a very strong Full-Stack Developer with solid expertise in AI and RAG-based systems. He delivered a production-ready AI chatbot using Next.js (TypeScript) and FastAPI, including a complete RAG…”See more

Fixed price
Mar 2025

React, Next.js developer

“Outstanding experience. Hired Gaurav a second time and he worked exactly as expected. Thanks Gaurav.”

Fixed price
Jun 2024

Add a new CRUD functionality to my web page

“This has been the second time working with Gaurav and I will work with him again and again. The communication was smooth, he was available when I needed him. Highly…”See more

Fixed price
Jun 2024

React and Laravel Developer for website functionalities

“Excellent work. Listens to brief and completes work as requested in a prompt and professional manner. I am very satisfied with the work. Thanks.”

Fixed price
View Upwork profile
06

FAQ

What does Gaurav Singh Karki do?

Gaurav Singh Karki is a full-stack and AI developer who builds web and mobile products end to end — from SaaS platforms and payment systems to AI/RAG applications. He has shipped 30+ products in production using Next.js, React, TypeScript, Node.js, Laravel, Python, and FastAPI.

Can I hire Gaurav for an AI or RAG project?

Yes. Gaurav builds production AI systems including RAG pipelines, AI chatbots, and LLM integrations with OpenAI and Claude. Recent work includes JARVIS RCSA, an enterprise AI platform used by banks, and a Next.js + FastAPI RAG chatbot delivered for an Upwork client with a 5-star review.

Is Gaurav available for freelance work?

Yes. Gaurav is a Top Rated developer on Upwork with a 100% Job Success Score across 1,400+ hours, and is available for freelance and contract work worldwide. You can reach him via the contact page, email, or WhatsApp.

What technologies does Gaurav specialize in?

Frontend: Next.js, React, TypeScript, Tailwind CSS. Backend: Node.js, Laravel, PHP, Python, FastAPI. AI: RAG systems, OpenAI and Claude APIs. Plus payments (Stripe, Razorpay, Adyen), databases (PostgreSQL, MySQL, Prisma), and cloud (Vercel, AWS, Docker).

What kinds of products has Gaurav shipped?

30+ production products, including an enterprise AI platform for banks (JARVIS RCSA), zero-knowledge encrypted cloud storage (CloudPlaza), multi-tenant SaaS for compliance firms (Captime), multi-gateway payment and billing platforms (Zettable, ExRouter), and consumer apps like MomentoCard.

Can Gaurav review or improve an existing codebase?

Yes. Alongside greenfield builds, Gaurav takes on security audits, scalability reviews, debugging, and feature work in existing projects — one Upwork client hired him specifically to audit and harden their app's security and left a 5-star review.

Where is Gaurav based and who does he work with?

Gaurav is based in India and works remotely with clients worldwide — including the US, Europe, Hong Kong, and India — collaborating across time zones and typically replying within a day.

How do I contact Gaurav?

Use the contact form at gauravkarki.com/contact, email karkigauravsingh@gmail.com, or WhatsApp +91 8077692820. He usually replies within a day.