Patrick Varonik Go (Golang) Developer/ Blockchain Developer Phone : +4915731604437 Email : varonik@pm.me Timezone: GMT+3 Languages: English, Russian CONTACT SUMMARY SKILLS Backend Engineer with 5 years of experience building fintech and blockchain systems using Go (Golang). Specialized in designing and developing scalable, high-load backend services and microservice architectures from scratch . Experienced in distributed systems , blockchain integrations , and smart contract development. • Backend : Go, Kafka, PostgreSQL, Elasticsearch, Redis, RabbitMQ, Prometheus, Jaeger, gRPC, Express.js, Rust • Blockchain : Solidity (EVM-Stack: Ethereum, BNB, Polygon), Solana, Move (SUI/Aptos) • DevOps : Kubernetes, Docker, Grafana, AWS, GCP EXPERIENCE Go Developer Oct 2023 - Mar 2026 HollaEx • Designed and implemented a blockchain indexing system for off-chain market data calculations, enabling users to view up-to-date liquidity pool data with latency under 250 ms. • Developed a custom router for Uniswap V2 liquidity pools, reducing average gas consumption in swap transactions by 13.2%. • Implemented real-time market data streaming via WebSockets , reducing price update latency by 48.9%. Tech Stack: Go, PostgreSQL, Kafka, Solidity, Kubernetes, GCP, Prometheus, Grafana Go Developer Apr 2021 - Oct 2023 Artezio • Designed an NFT metadata indexing system using Elasticsearch, improving attribute-based search and filtering performance by over 12.7x compared to SQL queries. • Built an asynchronous pipeline for processing NFT metadata and media assets from IPFS using a worker pool, reducing the latency of newly listed NFTs appearing in the marketplace by 27.1%. Tech Stack: Go, PostgreSQL, Elasticsearch, RabbitMQ, Redis Remote Remote • Implemented a Redis caching layer for frequently accessed marketplace data (floor price, collection stats, top holders), reducing PostgreSQL load by 58.5% EDUCATION Belarusian National Technical University 2019 - 2023 Bachelor's degree Information Systems and Technologies