Solidity Developer

Senior Blockchain Engineer

Senior Blockchain Engineer with over 10 years of software engineering experience, including 6 years specializing in blockchain, DeFi, smart contracts, and Web3 applications. Proven expertise in designing and delivering secure, scalable blockchain solutions across Ethereum and EVM-compatible networks, including smart contracts, dApps, wallet infrastructure, and distributed backend systems. Skilled in Solidity, React, Next.js, TypeScript, Node.js, GraphQL, and AWS, with strong experience in blockchain architecture, system design, security best practices, and performance optimization. Proven ability to lead technical initiatives and deliver reliable, production-ready Web3 applications.


Experience: 7 years

Yearly salary: $120,000

Hourly rate: $70

Nationality: 🇺🇸 United States

Residency: 🇺🇸 United States


Experience

Senior Blockchain Engineer (Web3 / DeFi Applications)
Interexy
2024 - 2026
Led development and integration of blockchain features for Web3 and DeFi client applications in production environments. Designed and integrated Solidity smart contracts into Ethereum and EVM-based decentralized applications. Developed Web3 frontend systems using React and TypeScript, implementing wallet-based authentication and transaction workflows. Built and maintained blockchain integration layers connecting smart contracts with backend APIs and off-chain services. Improved system reliability by refining transaction handling, state synchronization, and error recovery flows. Collaborated with cross-functional distributed teams to deliver secure and scalable Web3 client solutions. Contributed to architectural decisions for frontend–blockchain interaction patterns and application structure.
Blockchain Engineer (DeFi Protocol/ DEX Systems)
OneDex
2022 - 2024
Contributed to the development of a decentralized exchange (DEX) and DeFi trading infrastructure on the MultiversX ecosystem. Designed and implemented smart contract logic for decentralized trading, liquidity operations, and token swap mechanisms. Developed modular contract components supporting scalable DEX execution and on-chain trade settlement flows. Contributed to protocol architecture design for trading execution, liquidity management, and system extensibility. Built frontend and backend integrations supporting real-time Web3 trading functionality. Participated in optimization of transaction execution flow, improving reliability and consistency of trading operations. Collaborated with engineering team on protocol improvements, smart contract refinement, and system stability.
Blockchain Developer (Web3 / Wallet / dApp Systems)
Rhino.fi | MyKobo
2019 - 2021
Built decentralized applications and blockchain-integrated systems enabling cross-chain trading and wallet-based services. Built React-based Web3 applications with wallet integration and transaction lifecycle management. Integrated blockchain APIs and smart contract interactions for decentralized swap and token transfer functionality. Developed and supported wallet-based blockchain applications, including Stellar-based services (MyKobo). Worked on multi-chain interaction flow improving transaction consistency across blockchain networks. Collaborated with distributed teams to deliver production-ready Web3 applications and dApps. Supported debugging and optimization of blockchain transaction handling and frontend integration flows.

Skills

ai
blockchain-engineer
data-science
ethereum
hardhat
java
machine-learning
openzeppelin
python
rust
smart-contract
solana
solidity
typescript
web3js
english