Marcus Liu

Marcus Liu

$50/hr
I've specialized in Blockchain technology
Reply rate:
-
Availability:
Hourly ($/hour)
Age:
30 years old
Location:
Toronto, Ab, Canada
Experience:
8 years
Marcus Liu Blockchain Developer -- Toronto, Ontario, Canada Summary Blockchain Developer with 8 years of experience in designing, developing, and deploying blockchain solutions and backend systems. Architected projects processing over $10 million in daily transactions. Optimized performance metrics, scaled blockchain networks to support double the load, and integrated smart contract architectures. Enhanced user experience and system performance; strong collaborative skills for cross-functional teamwork. Education The University of Toronto • 09/2012-04/2016 Bachelor of Science in Computer Science Skills Blockchain Development Smart Contracts, Web3, Defi, Token Standards Bitcoin, Ethereum, Hyperledger, Polkadot, BSC, Solana, Cosmos Consensus Algorithms, P2P network, NFT marketplaces Programming Language C, C++, Python, JavaScript, TypeScript, SQL/NoSQL Solidity, Go, Golang, Rust Web Development React.js, Node.js, Next.js, HTML/CSS Restful APIs, Vue.js, Angular DevOps CI/CD, Agile, Docker & Kubernetes AWS, Google Cloud, Azure, Git, GitHub, GitLab Soft Skills Communication Teamwork Work Experience Blockchain Developer Etherparty / Vancouver, Canada (Remote) • • • • • • 01/2021–Now Architected of the Over the Counter (OTC) segment of the trading platform, enabling daily transactions to exceed $1 million, reducing transaction processing time by 20%. Developed a Rust-based proxy server, reducing UI latency by 20% and enhancing client experience. Implemented ERC-1155 protocol for asset tokenization in a blockchain game, attracted over 50000 players within 6 months. Created 50+ smart contracts on the Solana network using Rust, enhancing transaction speed by 40%. Leveraged APIs from multiple cryptocurrency exchanges to capture real-time pricing data, creating a dashboard for instantaneous market insights, increasing data retrieval speed by 40%. Resolved 95% of issues within 24 hours, ensuring continuity and improvement. Blockchain Developer FroanX / New York, NY, USA (Remote) • • • • Crafted a Solidity-based auction system on the Ethereum blockchain, supporting managed bids and ERC20 token transactions. Devised a TypeScript proxy with the Soltsice library for strongly-typed contracts, reducing runtime errors by 30% and doubling code maintainability by ensuring type safety and consistency. Developed APIs for transaction creation and signing by abstracting complex cryptographic processes, reducing implementation time by 40% and decreasing error rates by 30%. Deployed a microservice with Spring Boot and Kubernetes, using Docker containers for isolation and Helm charts for deployment, cutting deployment times by 50%. Backend Developer Sensibill / Toronto, Ontario, Canada • • • • • 06/2018 – 12/2020 06/2016 – 04/2018 Optimized API response with B-tree and GIN indexes in PostgreSQL reducing query response time by 60%. Devised advanced indexing strategies in PostgreSQL, including composite indexes, partial indexes, and covering indexes, reducing query execution times by 70% and enhancing performance by 40%. Introduced horizontal scaling with Nginx as a reverse proxy, doubling user capacity to handle concurrent user requests and improving load balancing performance by 50%. Engineered a biometric authentication system across 10 locations, reducing unauthorized access by 80%. Integrated third-party APIs from external applications into web platforms using OAuth 2.0 for secure authentication and authorization.
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