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English
$
USD
I will develop secure web3 dapps and smart contracts
About this Gig
Building full-stack decentralized applications requires flawless state synchronization between on-chain smart contracts and frontend clients. I am a Protocol Engineer with a top 0.1% national CS rank (GATE AIR 61), specializing in engineering production-quality Web3 dApps with airtight execution.
I architect highly complex Web3 systems like PredictXa full prediction market protocol with parimutuel pooling logic, real-time dynamic pricing, and decentralized off-chain data flows.
What I build for you:
Advanced Logic: Parimutuel pools, binary/multi-outcome markets, referral layers, and liquidity mining.
Secure Stack: Solid smart contracts rigorously validated with stateful Foundry test suites.
Elite Frontend: Next.js, wagmi v2, and viem for robust multi-wallet state management.
Real-Time Indexing: Custom GraphQL subgraphs via The Graph Protocol for rapid data queries.
Oracle Infrastructure: Secure Chainlink integrations for tamper-proof data validation.
Please share your technical requirements and product specs before ordering.
Purpose:
DeFi
•
Smart Contracts
Programming language:
JavaScript
•
Solidity
•
Node.js
•
CSS
Expertise:
Blockchain development
•
Smart contracts
Keep your assets and information safe
Cryptocurrency services focus solely on developing and programming. Never share sensitive information or private keys with others.
My Portfolio
FAQ
What blockchain networks do you support?
I primarily work with Ethereum and EVM-compatible chains including Sepolia testnet, Ethereum mainnet, Polygon, Base, Arbitrum, and BNB Chain. My demo project PredictX is deployed on Sepolia testnet. Network choice depends on your budget and requirements
Do I need to know Solidity or Web3 to work with you?
No. I handle everything — smart contract development, testing, frontend integration, and deployment. You just need to provide your project requirements. I will explain everything in simple terms throughout the process.
Will my smart contracts be tested before delivery?
Yes. Every contract I deliver comes with a Foundry test suite. My own PredictX project has 130+ passing tests covering trading logic, resolution, claims, edge cases, and fuzz testing. I do not deliver untested contracts.
Can you build a custom DeFi protocol from scratch?
Yes. I built PredictX from scratch including YES/NO markets, multi-outcome markets, PRED token rewards, referral system, Chainlink oracle integration, The Graph subgraph, and full Next.js frontend. I can build a similar system customized to your requirements.
What is The Graph and do I need it?
The Graph is a blockchain indexing protocol that enables fast, low-cost access to on-chain data. Instead of slow, expensive direct queries, dApps can efficiently fetch data—ideal for listings, trade history, and user stats. Included in Standard and Premium packages.
Do you provide the source code?
Yes, always. Full source code is delivered via a private GitHub repository. You will have complete ownership of the code. Source code is included in all packages.
How does the revision process work?
After delivery, you review the project and request changes within the revision limit of your package. Revisions cover bug fixes and minor adjustments to existing features. Adding entirely new features counts as a new order.
What do I need to provide before you start?
Just a clear description of what you want to build. Helpful extras include wireframes or design references, your preferred blockchain network, any specific token requirements, and your deadline. We discuss everything before I start work.
Can you deploy to mainnet?
Yes, mainnet deployment is available as a some $ gig extra. Note that mainnet deployment requires you to provide gas fees in real ETH. I strongly recommend a security review before any mainnet deployment.
How do I contact you before ordering?
Click the "Contact Me" button on my Fiverr profile. I respond within a few hours. Please describe your project briefly and I will tell you which package fits best and give you an honest timeline estimate.
