Browse categories
Explore
Fiverr Pro
English
$
USD
Yurri H
@yuriy_hirchak
Level 1
Blockchain and Full Stack Web developer
Ukraine
English, Ukrainian
About me
Blockchain & AI developer focused on trading automation, DeFi protocols, and Web3 infrastructure.
I build Polymarket trading bots, AI-based execution systems, Telegram/Discord automation tools, and crypto volume monitoring solutions. I also develop SPL tokens, presale and launchpad smart contracts, supply chain blockchain systems, and full Web3 dApps.
My approach emphasizes secure architecture, scalability, and production-grade engineering for startups, traders, and serious Web3 projects.
Skills
Yurri H
$100/hour
Offline •
Average response time: 1 hour
See my services
Decentralized Applications (dApps)
I will blockchain developer openclaw polymarket trading ai bot pump fun presale kalshi
Decentralized Applications (dApps)
I will blockchain developer supply chain smart contract spl token launchpad web3 dapp
Want to work on an hourly basis?
Tell Yurri H what you need.
$100
/
hourPortfolio
Work experience
Senior Blockchain & AI Engineer (Freelance)
Independent Consultant (via Fiverr) • Freelance
Aug 2017 - Present • 8 yrs 9 mos
Senior Blockchain and AI engineer with 8+ years of professional experience delivering production-grade solutions across Web3 and intelligent systems. Specialized in DeFi protocol development, smart contracts, EVM architectures, and AI-driven automation. Proven experience building and deploying Compound-style lending and borrowing protocols, token launchpads, presale systems, NFT standards, and on-chain trading and monitoring bots. Strong background in Solidity, proxy patterns, interest rate models, liquidations, oracle integrations, and mainnet deployments. Additionally experienced in applying AI and data-driven models to trading strategies, automation, analytics, and decision-support systems within blockchain ecosystems. Regularly collaborate with founders and technical teams to design secure, scalable, and audit-ready systems from concept to mainnet.
15 Reviews
| (15) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 15 Reviews
Sort By
Most relevant
mateo_clark820
Repeat Client
Canada
I had a good experience working with Yurri. He paid strong attention to detail and made sure everything was done correctly. His coding skills are solid, and the final result worked as expected. He delivered the project on time and kept me updated throughout the process. Communication was clear and proactive,...
Helpful?
henry_lamb25
United Kingdom
Great experience working with this freelancer. The work was bug free and exceeded my expectations. Very cooperative and showed a deep understanding of the project. Highly recommended.
Helpful?
alexenderson
United Kingdom
Amazing client to work with. Very clear requirements and easy communication throughout the project. Quick responses and always respectful, which made the development process smooth and efficient. Really appreciate the trust on this project. Looking forward to working together again in the future. Thank you!
Helpful?
evie_owen54
United Kingdom
Reliable and efficient freelancer. Strong technical skills, clean implementation, and professional communication throughout. Added extra value beyond the original scope and delivered on time. Good experience overall.
Helpful?
michael9285
United States
I had an excellent experience working with this freelancer. The final result exceeded my expectations in both quality and performance. The delivery was completely bug-free, and everything worked exactly as intended from the first handover. Communication was smooth throughout the project. The freelancer...
Helpful?
