You will get Smart Contract Development for DeFi Applications
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Top Rated
Project details
Specializing in secure, scalable smart contracts for DeFi, my services range from basic token contracts to complex DeFi ecosystems.
Starter: Get your project off the ground with a simple token or basic smart contract, perfect for beginners in DeFi or those needing quick solutions.
Standard: Elevate your DeFi project with advanced features like staking or liquidity pools, coupled with an initial audit for added security.
Advanced: Build a comprehensive DeFi platform with full auditing, detailed documentation, and deployment support, ideal for sophisticated DeFi applications.
Starter: Get your project off the ground with a simple token or basic smart contract, perfect for beginners in DeFi or those needing quick solutions.
Standard: Elevate your DeFi project with advanced features like staking or liquidity pools, coupled with an initial audit for added security.
Advanced: Build a comprehensive DeFi platform with full auditing, detailed documentation, and deployment support, ideal for sophisticated DeFi applications.
Web Programming Project
Blockchain Development, API Development, API IntegrationProgramming Languages
JavaScript, Python, TypeScriptCoding Expertise
Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$3,000
|
Standard
$5,000
|
Advanced
$7,000
|
|---|---|---|---|
| Delivery Time | 14 days | 21 days | 28 days |
Number of Revisions | 1 | 2 | 3 |
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$1,000
Custom Tokenomics Consulting
+$500
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ZW
Zige W.
Jan 20, 2026
NFT Marketplace Development Expert Needed
Highly skilled Full-Stack Web3 & NFT Marketplace Developer
Kaushik delivered excellent work across both front-end and back-end development for our NFT marketplace. He showed strong expertise in React and Next.js for building a smooth, user-friendly interface, along with Node.js for backend APIs and business logic.
On the Web3 side, he handled NFT smart contract integration, wallet connections, minting and transaction flows with great attention to security and reliability. He also provided valuable input on architecture, performance, and scalability.
Communication was clear and proactive, deadlines were consistently met, and the overall quality of work was excellent. We would gladly work with him again.
Kaushik delivered excellent work across both front-end and back-end development for our NFT marketplace. He showed strong expertise in React and Next.js for building a smooth, user-friendly interface, along with Node.js for backend APIs and business logic.
On the Web3 side, he handled NFT smart contract integration, wallet connections, minting and transaction flows with great attention to security and reliability. He also provided valuable input on architecture, performance, and scalability.
Communication was clear and proactive, deadlines were consistently met, and the overall quality of work was excellent. We would gladly work with him again.
BH
Brandon H.
Sep 21, 2022
Web3 Full Stack Developer (VueJS, Web3JS, EthJS)
He is amazing at his work and able to go above and beyond for things we missed out during the process. He works until you are satisfied and even offers his knowledge whenever possible! I’m super impressed and he is truly one of the best I’ve seen on Upwork!!
MU
Mams U.
Aug 19, 2022
Line Graph Chart with Tooltip in React Native
Kaushik communicated clearly and concisely. He researches the task fully before engaging in the project. He is very component in his work and is always available for discussions.
He kept us engaged and updated at all times.
He kept us engaged and updated at all times.
About Kaushik
Full-Stack & React Native Developer | SaaS, Next.js, Node, Supabase
100%
Job Success
Dhari, India - 9:13 am local time
8+ years in, most of my work is one of two things. Either a founder has an idea and needs it built properly the first time — the database, the payments, the mobile app, the admin side — without it collapsing the moment real users arrive. Or someone already has a product, often started by another developer or an AI tool, that almost works but can't be trusted, and they need someone to take it over and finish it honestly.
I've done both ends of that. I built VNYX, a multi-tenant SaaS platform that resale businesses use to grade products, generate listings with AI, and sync them across marketplaces like Shopify and eBay — where multiple businesses run on the same system and none can ever see another's data, isolated on every request through a five-tier role hierarchy. And on PepsiCo's MiNegocio+, a B2B ordering platform live across 8 countries for a Fortune 50 company, I worked on React Native apps that had to keep working with no signal at all — distributors placing orders offline and syncing cleanly on reconnect, with no duplicate or lost orders.
My stack is React, Next.js, Node, and TypeScript on the web, React Native on mobile, with Postgres, Supabase, and Stripe underneath. I lean on AI tools like Claude Code to move quickly — and I read every line they write, which is exactly why I'm comfortable cleaning up a codebase one started.
What you're really hiring is someone who'll tell you the truth about your product, build it to survive growth, and still be around after it ships. If that's what you need, tell me what you're working on and where it hurts.
Steps for completing your project
After purchasing the project, send requirements so Kaushik can start the project.
Delivery time starts when Kaushik receives requirements from you.
Kaushik works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements Gathering:
Collect detailed project specifications from the client, including desired features, platform preferences, and security requirements.
Design Phase:
Draft the smart contract architecture, outlining tokenomics, staking mechanisms, or liquidity pools based on the tier selected.