dmitriyischenko

Senior Blockchain Developer & De Fi Expert

I am Dmytro Ishchenko, a Senior Blockchain Developer & DeFi Expert with over 5 years of extensive software development experience, specialising in designing and deploying secure, interoperable blockchain solutions. My portfolio includes developing cross-chain bridges using LayerZero v1 and v2, engineering core smart contracts for in-game mechanics and vesting, and successfully deploying solutions that secure over $25 million in locked assets, audited by Hacken. I also possess proven expertise in enhancing the ZkSync Era Java SDK, migrating Uniswap Permit 2 test suites, and architecting production-ready Uniswap v4 Hooks with significant gas optimisation. Beyond blockchain, I bring strong Java backend development skills, including processing large blockchain data volumes, and was awarded 1st place at LoNG-2021: Blockchain Coming to Ukraine, alongside experience as a Developer Relations representative. I am actively seeking challenging Senior Blockchain Developer or DeFi Expert roles where I can apply my advanced skills in innovative projects, and I am open to relocation.

Experience: 5 years

Yearly salary: $150,000

Hourly rate: $100

Nationality: 🇺🇦 Ukraine

Residency: 🇪🇸 Spain

Experience

Senior Blockchain Developer

Gunzilla

2024 - 2025

Designed and deployed a cross-chain bridge using LayerZero v2 to enable seamless asset transfers between Gunz and Solana, ensuring high security and interoperability. Developed and deployed a LayerZero v1-based bridge that connects Gunz and Avalanche, using Create2 to ensure all smart contracts and the ERC20 Gunz token have deterministic addresses, which simplifies cross-chain liquidity and maintenance. Engineered core smart contracts for the Off The Grid game, implementing key in-game mechanics and ensuring robust security and scalability for player interactions.

Blockchain Developer

Vareger

2023 - 2024

Enhanced the Java SDK for ZkSync Era by implementing EIP712 signature support using Web3j, adapting Create2 deployment methods, and developing efficient block information retrieval functions. Migrated comprehensive test suites from Foundry to Hardhat for ZKsync compatibility and rewrote core hashing and signature verification logic from Solidity to TypeScript while maintaining test integrity for the Uniswap Permit2 standard.

Blockchain Developer

PureFi

2022 - 2023

Developed a secure SDK with 100% test coverage for backend-signed payload verification, optimizing gas consumption to ensure efficient and reliable smart contract-level compliance. Architected a production-ready Uniswap v4 Hook in Solidity (using Solmate for gas optimization) to provide real-time compliance checks for swaps. Deployed the system to testnet and BNB Mainnet.

Java Backend Developer

AMLBot

2020 - 2021

Developed a Java-based module using Spring Batch to process and write large volumes of TRON blockchain data to PostgreSQL. Created a high-performance REST API with Spring Boot for managing access lists and implemented multi-threaded batch processing of CSV files.

Skills

erc-20

evm

hardhat

solana

typescript

web3

zk-evm

solidity

english

russian

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