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Serhii Vakulenchyk
Open to opportunitiesBackend Node.js Developer
I build high-load Node.js payment systems with reliable event-driven transaction processing.
GeorgiaBackend Node.js Developer at Andersen Lab
About
At Andersen Lab, I build payment services for a high-concurrency iGaming platform processing tens of thousands of transactions daily. I deliver multi-currency deposits and withdrawals, provider integrations, webhooks, reconciliation, and failure recovery.
I resolved duplicate callback race conditions with Redis-based distributed locks and scale zero-loss flows with Kafka and RabbitMQ. I also optimise MySQL and ClickHouse read paths, deploy through GitLab CI/CD, and lead production root-cause analysis using Coralogix.
Previously, I owned the data layer for Warner Music Group's ADA Hub at Enke Systems, supporting release distribution, DDEX/ERN exchange, PostgreSQL/Aurora, OpenSearch, and Oracle integration. My earlier full-stack work across Capgemini Engineering, Eastern Peak, EPAM Systems, and Sellbery helps me take features from backend architecture through React or Angular implementation.
Experience
Backend Node.js Developer
Own payment services on a high-concurrency iGaming platform processing tens of thousands of transactions per day. Built integrations with international payment providers, resolved race conditions with Redis-based distributed locks, and optimized event-driven flows on Kafka and RabbitMQ.
TypeScriptNodeJSNestJSTypeORMKafkaRabbitMQMySQLClickhouseRedisOpenSearchGraphQLRESTReactS3CoralogixDockerKubernetes
Education
Vinnytsia National Technical University
Specialist degree in Information and Communication Systems Security from Vinnytsia National Technical University, completed in 2014.
Specialist degree in Information and Communication Systems Security from Vinnytsia National Technical University, completed in 2014.