Oleksii Liashko
Staff Software Engineer @OpenTable
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WORK HISTORY
Staff Software Engineer @OpenTable
Kitchener, ON, CA
Serve as cross-team technical lead for distributed backend systems responsible for real-time reservation and availability management- Lead the design and delivery of major architectural improvements impacting multiple services and engineering teams- Designed and implemented a data publishing and synchronization engine to improve reliability and scalability across distributed services- Introduced database performance optimizations and caching strategies for large datasets, establishing patterns later adopted by other teams- Led complex data migrations and restructuring efforts required for platform evolution- Improved system resilience by investigating production incidents, resolving critical failures, and driving resource optimization and graceful degradation strategies- Increased team effectiveness through architecture documentation, mentoring engineers, and extensive code reviews- Improved engineering velocity by leveraging AI agents for code analysis, refactoring, and rapid prototyping, accelerating development and technical problem solving.
EDUCATION
Classic Private University
Master's degree, Information Management Systems and Technologies, Programming
ABOUT OLEKSII LIASHKO
Staff Software Engineer with 10+ years of experience designing and building large-scale backend systems for high-traffic platforms.I specialize in distributed systems, backend architecture, and performance optimization, with a strong focus on reliability, scalability, and clean system design. Throughout my career I’ve worked on complex platforms involving high-volume transactions, large datasets, and cross-team service integrations.In my current role I operate as a cross-team technical leader, driving architectural improvements, leading complex system initiatives, and mentoring engineers while remaining hands-on with backend development.I enjoy tackling difficult engineering problems, simplifying complex systems, and improving the developer experience through better architecture, tooling, and automation. I actively use AI-assisted development tools to accelerate problem solving, code review, and system design exploration.Core expertise- Distributed systems & microservices architecture- Backend platform development- System design & API architecture- Performance optimization & scalability- Database design and large-scale data migrations- Production reliability & observability- Cross-team technical leadership and mentoringTechnologies.NET / ASP.NET Core, Java, PostgreSQL, MSSQL, Mongo, Kafka, Docker, Kubernetes, ELK, Grafana, CI (TeamCity, Jenkins)
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