Principal Engineer – Systems Architecture & Scalability

Lead large-scale architectural refactoring initiatives — breaking down complex monoliths into modular, decoupled services with clear ownership boundaries and well-defined APIs. Define and evolve system architecture principles that support scalability, high availability, and ease of deployment across multi-region environments. Design strategies for multi-tenancy, data isolation, and schema evolution to support Xsolla’s growing portfolio of products and clients. Provide technical leadership across multiple teams — advising on system decomposition, domain-driven design, and dependency management. Establish and guide database architecture strategy, including data partitioning, replication, caching, and observability practices for large-scale distributed systems. Collaborate with platform, infrastructure, and DevOps teams to ensure systems are cloud-native, fault-tolerant, and horizontally scalable. Act as a trusted architectural advisor for engineering leadership, helping prioritize modernization efforts and technical debt reduction initiatives. Conduct architecture reviews, ensuring that performance, maintainability, and scalability are baked into every stage of the software lifecycle. Mentor senior engineers and architects, fostering a culture of design excellence and long-term technical vision.