Oleh Zhylin

Architected scalable, high-availability solutions for a large-scale enterprise retail network. Designed cloud and microservices infrastructure, focusing on predictability of delivery and system uptime. Translated complex business requirements into clean technical blueprints using UML and ArchiMate. Key Achievement: Managed system risks and optimized integration workows between legacy environments and modern cloud APIs.

Drove core feature development and optimization for high-performance software products. Applied the 4+1 Architectural View Model to shift quality control to the design stage, reducing bugs in production. Optimized third-party integrations, decreasing cloud operational budgets through smart architecture choices. Designed and executed automated testing strategies, speeding up product release delivery.

Rescued a legacy monolithic application from architectural collapse (recursive bug growth) by designing and executing a migration to a layered microservices architecture using NestJS. Enforced strict database and service isolation to physically prevent tight coupling and poor coding practices, signicantly improving system stability and maintainability. Orchestrated cross-functional teamwork across different time zones, established code quality standards, and conducted technical interviews for backend roles.

Developed and refactored enterprise web extensions within a global engineering framework. Modernized legacy applications and implemented secure client-side tools for document validation.