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Fiverr Pro
English
$
USD
I will develop custom smart contract for staking, defi, raffle, presale, or any dapp
Fullstack and Blockchain Developer, Founder of Dock30
Full-Stack & Blockchain Engineer | Founder of Dock30
420+ Fiverr projects | 5.0 ⭐ | Top Rated Seller
→ Built the platform behind a $40M+ AUM project
→ Token launches with $10M+ market cap
→ $300K+ fro...
Top Rated
Top Rated sellers are individually selected by Fiverr after meeting specific benchmarks for quality and service.
About this Gig
Need a complex smart contract that works in production, not just on testnet?
I specialize in custom Solidity and Rust contracts for DeFi, staking, presales, raffles, and advanced on-chain logic. 420+ projects delivered, 5.0 rating, Top Rated Seller.
What I build:
- Staking and yield farming contracts
- Vesting and token distribution systems
- Presale and ICO smart contracts
- Raffle, lottery and gamification systems
- Multi-sig and governance contracts
- Custom DeFi protocols (lending, liquidity pools)
- Airdrop and reward distribution
- Any custom on-chain logic you need
My contracts power:
- A $40M+ AUM project (still running)
- Token launches with $10M+ market cap
- NFT mints generating $300K+ in single drops
Every project includes:
- Gas-optimized, production-ready code
- Full test coverage (Hardhat + Foundry)
- Contract verification on explorer
- Documentation
- 1 week free support
Works on all EVM chains (ETH, Polygon, Base, BSC, Arbitrum) + Solana.
Message me with your idea for an exact scope, timeline, and quote.
Purpose:
DeFi
•
Web browser
•
Dao
•
NFT
•
Smart Contracts
Programming language:
Solidity
•
TypeScript
•
Node.js
•
React
•
CSS
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
Can you build a raffle or lottery system?
es! I have built multiple raffle and lottery dApps with verifiable randomness (Chainlink VRF or custom). These are some of my most popular projects.
Can the same contract work on multiple chains?
Yes, Solidity contracts deploy to any EVM chain. I set up scripts for all chains you need.
How do you handle security?
Solidity best practices, OpenZeppelin where appropriate, comprehensive tests, and I can arrange external audits for high-value contracts.
Do you work with existing contracts?
Both. I can modify, extend existing contracts, or build from scratch.
What if I need ongoing development?
Many clients return for features. Priority support for returning clients, retainer for larger projects.
Reviews
2 reviews for this Gig
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| (0) | ||
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
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Most relevant
M 
marcus_alpha
Romania
Ongoing collaborationI ve collaborated with Roberto several times, and each time I was pleasantly surprised by the quality of his services, his professionalism, and kindness. I highly recommend him to everyone with confidence!
$2,500-$5,000
Price
2 weeks
Duration
Helpful?C crypto10k
Bulgaria
Ongoing collaborationGreat work!
$800-$1,000
Price
9 days
Duration
Helpful?
Reviews
2 reviews for this Gig
| (2) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
M marcus_alpha
Romania
Ongoing collaborationI ve collaborated with Roberto several times, and each time I was pleasantly surprised by the quality of his services, his professionalism, and kindness. I highly recommend him to everyone with confidence!
$2,500-$5,000
Price
2 weeks
Duration
Helpful?C crypto10k
Bulgaria
Ongoing collaborationGreat work!
$800-$1,000
Price
9 days
Duration
Helpful?
