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You will get Smart Contract Development & DApp — Solidity, Foundry, Hardhat

Hongbin H.Status: Offline
Hongbin H. Hongbin H.
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Let a pro handle the details

Buy Web Application Programming services from Hongbin, priced and ready to go.
Hongbin H.Status: Offline
Hongbin H. Hongbin H.
Preview imagePreview imagePreview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Hongbin, priced and ready to go.

Project details

I build production-ready smart contracts and full-stack DApps with a security-first approach. I've audited 16+ DeFi protocols and found critical vulnerabilities in contracts holding $100M+. That same mindset goes into every line of code I write for you.

What I build:
ERC-20 tokens, ERC-721/1155 NFTs, custom tokenomics
DeFi: staking, vaults, yield strategies, lending
DAO governance, treasury, payment splitters
Vesting, airdrops, CREATE2 factories, upgradeable proxies
Full-stack DApps: React/Next.js + wagmi/ethers.js

Stack: Solidity, Foundry, Hardhat, OpenZeppelin, Chainlink, Python, TypeScript.
Chains: Ethereum, Base, Polygon, Arbitrum, Optimism, BSC.

Every contract ships with full test coverage, gas optimization, and docs.
Programming Languages
JavaScript, Python, TypeScript
Coding Expertise
Performance Optimization, Security
What's included
Service Tiers Starter
$50
Standard
$150
Advanced
$500
Delivery Time 3 days 5 days 10 days
Number of Revisions
235
Number of Pages
136
Design Customization
-
-
Content Upload
-
-
-
Responsive Design
-
Source Code
Optional add-ons You can add these on the next page.
Additional Revision
+$15
Source Code
+$25

Frequently asked questions

Hongbin H.Status: Offline

About Hongbin

Hongbin H.Status: Offline
Blockchain Developer & Security Auditor | Smart Contracts | Python | A
Wenzhou, China - 4:41 pm local time
I build, audit, and automate in Web3.

Smart contract development (Solidity, Foundry, Hardhat) with security-first approach. I've found critical vulnerabilities in DeFi protocols with $100M+ TVL through Immunefi, Code4rena, and HackenProof.

Python automation and data engineering at scale -- processed 1.3 billion records across 280GB+ datasets. Built production Telegram bots, API integrations, and ETL pipelines.

Full-stack Web3 apps (React/Next.js + ethers.js/wagmi). AI agent and chatbot development with multi-model API integration.

Services: smart contract dev, security audits, DeFi protocol design, Python automation, AI agent building, data pipelines.

Fast delivery. Clean code. No BS.

Steps for completing your project

After purchasing the project, send requirements so Hongbin can start the project.

Delivery time starts when Hongbin receives requirements from you.

Hongbin works on your project following the steps below.

Revisions may occur after the delivery date.

Requirements & Scope

Review your specs, clarify requirements, agree on deliverables and timeline.

Development & Testing

Build the smart contract/DApp, write unit tests, iterate based on your feedback.

Review the work, release payment, and leave feedback to Hongbin.