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I am a senior blockchain and full-stack engineer with sixty years of experience in designing and implementing web applications and blockchain solutions. My expertise includes DeFi protocols, DAOs, NFT marketplaces, and cryptocurrency payments. I’m proficient in Layer 1 and Layer 2 scaling solutions, cross-chain interoperability, and driving performance and throughput improvements. I excel at managing technical projects and solving complex business challenges.…I am a senior blockchain and full-stack engineer with sixty years of experience in designing and implementing web applications and blockchain solutions. My expertise includes DeFi protocols, DAOs, NFT marketplaces, and cryptocurrency payments. I’m proficient in Layer 1 and Layer 2 scaling solutions, cross-chain interoperability, and driving performance and throughput improvements. I excel at managing technical projects and solving complex business challenges.

Sebastian Robinson

Full Stack Developer, Blockchain Developer, Web Developer, +2

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I am a senior blockchain and full-stack engineer with sixty years of experience in designing and implementing web applications and blockchain solutions. My expertise includes DeFi protocols, DAOs, NFT marketplaces, and cryptocurrency payments. I’m proficient in Layer 1 and Layer 2 scaling solutions, cross-chain interoperability, and driving performance and throughput improvements. I excel at managing technical projects and solving complex business challenges.…I am a senior blockchain and full-stack engineer with sixty years of experience in designing and implementing web applications and blockchain solutions. My expertise includes DeFi protocols, DAOs, NFT marketplaces, and cryptocurrency payments. I’m proficient in Layer 1 and Layer 2 scaling solutions, cross-chain interoperability, and driving performance and throughput improvements. I excel at managing technical projects and solving complex business challenges.

Available to hire

I am a senior blockchain and full-stack engineer with sixty years of experience in designing and implementing web applications and blockchain solutions.

My expertise includes DeFi protocols, DAOs, NFT marketplaces, and cryptocurrency payments. I’m proficient in Layer 1 and Layer 2 scaling solutions, cross-chain interoperability, and driving performance and throughput improvements. I excel at managing technical projects and solving complex business challenges.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Remote Lead Developer at ShypV

October 1, 2024 - November 13, 2025

Architected and scaled 5+ enterprise-grade applications using React/Redux ecosystem, implementing custom hooks that drove 30% improvement in performance metrics. Spearheaded UI/UX modernization initiatives based on data-driven user feedback, resulting in a 40% surge in user retention. Engineered mission-critical Java OSGi bundles and Sling Servlets, enabling rapid deployment within a 24-hour turnaround. Orchestrated cross-functional collaboration with UX teams to implement accessibility standards, reducing user churn by 30%. Established a CI/CD pipeline with Jenkins and GitHub Actions, slashing deployment cycles by 50%. Formulated developer documentation framework that accelerated onboarding by 20%.

Senior Blockchain Developer at Freelancing United States

June 1, 2025 - June 1, 2025

Enhanced DePIN project analytics site implementing GraphQL, Apollo, Dune Query, Redis caching, achieving 30% improvement in data retrieval speed and user experience through efficient Cron Jobs and monorepo architecture. Designed and launched NFT marketplaces on Ethereum and Solana using Next.js, Node.js, PostgreSQL, IPFS, Solidity, Hardhat, and Ethers.js, resulting in a 25% reduction in transaction times. Developed a Solana trading bot with TypeScript, Solana/Web3.js, and Raydium SDK, increasing trading efficiency by 15% through automated strategies and real-time data integration via Telegram API. Migrated React apps to Next.js with SSR/SSG, achieving a 40% improvement in page load times and SEO. Managed tasks and tracked progress using Jira for smart contract, Web3, and frontend work, boosting team coordination by 30%.

Senior Blockchain Engineer at Luxfy

November 1, 2024 - November 1, 2024

Directed the development of the Vulcan ICO launch pad frontend and smart contract using Solidity, Hardhat, TypeScript, Ethers.js; raised $50K in first week. Constructed Turbo Trade cross-chain AMM/DEX platform using Cosmos SDK and IBC, enabling seamless cross-chain liquidity, increasing liquidity by 25%. Deployed 5+ Solidity smart contracts to manage secure trading on a multi-user platform with data via The Graph Subgraph, improving front-end data retrieval speeds by 30%. Implemented a QA-driven test strategy to achieve 100% pass rate across browsers. Integrated CoinMarketCap and CoinGecko APIs into Next.js UI providing real-time analytics and dashboards, boosting user trust and engagement by 30%.

Remote Smart Contract Developer at Ruby Exchange

December 2, 2021 - December 2, 2021

Created RubySwap and additional smart contracts for DeFi functionalities, ensuring secure liquidity pools, token swaps, and staking mechanisms; improving transaction speeds by 20%. Conducted thorough testing and audits to identify vulnerabilities, enhancing platform security and reducing incidents by 50%. Built a user-centric interface for DeFi using Next.js and React, integrating seamless smart contracts via Ethers.js and Subgraph, resulting in a 35% increase in user satisfaction.

Frontend Developer at Auto Trophy

May 1, 2020 - May 1, 2020

Built a reusable library of React components across 10+ projects, increasing developer productivity and reducing coding time by 30%. Implemented advanced frontend features such as lazy loading and code splitting using Next.js, delivering a 50% improvement in page load times and user interactions. Built scalable backend architecture in Golang enabling real-time data processing for media and notification services, supporting a 50% rise in user engagement metrics.