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
Senior Full-Stack Developer | React | Next.js | Node | Claude | Web3
100%
Job Success
Dhari, India - 5:37 pm local time
Let's build your MVP in 7 days.
I build full-stack web and mobile applications, agentic AI systems, and Web3 platforms that are production-ready from day one.
If your codebase is a mess — AI-generated or otherwise — I'll fix it fast and build it right. If you need AI integrated into your product, custom Claude agents, or MCP servers connecting your systems, that's exactly what I do. If you need a DeFi platform, NFT marketplace, or smart contract shipped, I've done it across Ethereum, Polygon, and BSC.
What I build:
Agentic AI Systems — Claude Code, MCP servers, multi-agent workflows, AI integration into existing products and platforms.
Full-Stack Web & Mobile — React, Next.js, Node.js, TypeScript, React Native. Clean architecture, real performance, zero shortcuts.
Web3 & Blockchain — Smart contracts, DeFi platforms, NFT marketplaces, DEX systems, wallet integrations. Solidity, Ethers.js, Wagmi, OpenZeppelin.
Stack: Claude Code · Anthropic API · MCP · React · Next.js · Node.js · TypeScript · React Native · Solidity · Ethers.js · Wagmi · PostgreSQL · MongoDB · AWS · Supabase
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.