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I'm a Web3 Backend Engineer with 6+ years of commercial experience, specializing in Solidity, EVM, and scalable Node.js backends. I have a strong background in system architecture and performance optimization, focusing on reliability, modularity, and security. I love building practical Web3 and AI-driven products with international teams.…

Roman Vaseruk

Back-End Developer, Web Developer, Full Stack Developer, +2

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I'm a Web3 Backend Engineer with 6+ years of commercial experience, specializing in Solidity, EVM, and scalable Node.js backends. I have a strong background in system architecture and performance optimization, focusing on reliability, modularity, and security. I love building practical Web3 and AI-driven products with international teams.…

Available to hire

I’m a Web3 Backend Engineer with 6+ years of commercial experience, specializing in Solidity, EVM, and scalable Node.js backends.

I have a strong background in system architecture and performance optimization, focusing on reliability, modularity, and security. I love building practical Web3 and AI-driven products with international teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Advanced

Polish

Advanced

Ukrainian

Fluent

Russian

Advanced

Work Experience

Founding Engineer at Timus Lab

January 1, 2024 - January 1, 2024

Led a small team in building multiple DeFi, trading, and blockchain infrastructure initiatives. Decentralized Margin Trading Platform designed and shipped using Uniswap V3 LPs as collateral; custom liquidation thresholds and Chainlink-based oracle pricing. Protocol reached significant trading activity and included high-frequency bot development, cross-chain integration, and advanced back-end tooling.

Remote Backend Developer at Check Block

January 1, 2020 - January 1, 2020

Built backend analytics for Bitcoin transaction flows, focusing on address clustering and fund propagation. Implemented batch processing and data pipelines to support risk and analytics workloads.

DApp / Backend Developer at Calamity Online

December 1, 2022 - November 20, 2025

Built a Web3 game DApp including smart contracts and DApp frontend integration (React, wagmi, viem), server operations, and data indexing. Implemented NFT staking contracts (ERC-721/ERC-1155) and a cross-chain bridge with v2 and EIP-712 signature validation. Ongoing involvement in multi-chain tooling and game backend work.

Remote Backend Engineer at NDA

December 1, 2025 - December 1, 2025

Worked on a large-scale Web3 & AI infrastructure initiative under NDA. Focused on backend, data pipelines, and on-chain integrations. Highlights include integrating AI APIs and Retrieval-Augmented Generation pipelines to organize heterogeneous datasets and deliver context to internal services; built high-throughput endpoints and maintained backend reliability.