Andrei Marchenkov

Stack: Kotlin, Spring Boot, Microservices, DDD. Key Results: * Led transition of legacy logic into 10+ modern Kotlin/Spring microservices using Domain-Driven Design. * Designed DB schema ensuring 100% auditability and system state restoration. * Orchestrated B2B bank partner ecosystem and loan application flows.

Stack: Java, ScyllaDB, Docker, IntelliJ API. Key Results: * Launched Docker security scanning feature; handles 30% of total platform traffic. * Achieved 100x throughput increase via decoupled engine and async processing. * Reduced DB query time by 500ms through Scylla schema redesign. * Developed IntelliJ plugin for source code license compliance for 100+ customers.

Stack: Java, Project Reactor/RxJava, Spring. Key Results: * Implemented reactive Java APIs for high-load e-commerce payment gateway. * Reduced payment processing errors by 15% via low-latency transaction processing. * Mentored and prepared 3-5 junior/middle developers for promotions.

Stack: Java, GCP, DialogFlow, Microservices. Key Results: * Developed Java sourcing application, reducing delivery costs of 1-line-item orders by 20%. * Built IVR bot using DialogFlow to automate customer requests, decreasing operator load by 15%. * Utilized GCP cloud services for microservice architecture.

Stack: Java, Event-Sourcing, Migration Pipelines. Key Results: * Designed zero-downtime migration pipeline for data transfer across 10 government departments. * Implemented Event-Sourcing pattern to significantly increase data availability for reporting.