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Fiverr Pro
English
$
USD
I will develop and audit smart contracts in solidity or rust
Blockchain and AI Software Developer
Top-rated Web3 & Fintech R&D Hub delivering enterprise-grade infrastructure and production-ready White Label solutions.
We build neo-banking platforms, RWA tokenization systems, stablecoin and payme...
Vetted by Fiverr Pro
Mykhailo was selected by the Fiverr Pro team for their expertise.
Vetted for
Blockchain Development & Solutions
About this Gig
Vetted Pro
I am Mykhailo, founder of Cowchain, a blockchain studio with 60+ engineers. I develop and audit Solidity and Rust smart contracts that secure real assets, funds and production Web3 products.
WHAT YOU GET
Custom Solidity and Rust smart contract development
ERC20, ERC721, ERC1155 and ERC4626 standards
Proxy and upgradeable contract architecture
Manual security review and vulnerability scanning
Written audit report with severity ratings
Fix recommendations and remediation review
Gas optimization and full test coverage
Static analysis, CI setup and deployment support
Source code, tests and technical documentation
WHY COWCHAIN
120+ delivered Web3 products
Contracts supporting projects with $180M+ client market cap
Audit-ready development by default
Clear reports suitable for teams and investors
Transparent milestones and regular updates
Post-launch support included
PROCESS
- Send your specification or repository link
- Receive a concrete scope, timeline and fixed quote within 24 hours
- Approve the specification or audit scope
- Follow development or review through regular updates
- Receive code, tests, findings report, fixes and deployment support
Tools:
Truffle
•
ZeppelinOS
•
Etherscan
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
Other Blockchain Development & Solutions Services I Offer
FAQ
Who owns the source code and intellectual property?
You receive full ownership of the source code and intellectual property after final delivery. All contracts, tests, deployment scripts and documentation are transferred to you.
Do you audit third party smart contracts?
Yes. I provide manual code review, automated vulnerability scanning and a written report with severity ratings, affected code and remediation recommendations.
Do you develop contracts in Solidity and Rust?
Yes. I develop Solidity contracts for EVM networks and Rust programs for Solana and other supported ecosystems, depending on the project requirements.
What is included in the security audit report?
The report includes the audit scope, methodology, vulnerability severity, technical findings, affected code, remediation guidance and a review of implemented fixes.
How do we start the project?
Send your specification, repository link, contract addresses and required scope. I will review the materials and provide a concrete timeline and fixed quote within 24 hours.
