Kristina Klementova

Worked across multiple projects, primarily on a Kotlin + Ktor service serving 10K+ CIS clients. Over two years, independently upgraded Ktor 1.6→3.2 with zero critical incidents, significantly boosted performance, and personally expanded the codebase and feature set by 60%. Eliminated all blind spots and broken legacy blocks. In parallel contributed to classic Java + Spring Boot microservices. Solely designed and implemented one stable microservice from scratch, now serving internal GPN infrastructure needs.

Developed a monolithic Java + Spring Boot + MySQL + Hibernate service for real-time tram tracking, Excel/PDF reporting, and travel time analytics. Worked in a 4‑developer team with a separate analytics unit. Operated under extreme uncertainty and shifting requirements-often changing multiple times daily. Actively negotiated with unclear stakeholders, used visual mock-ups and whiteboard sessions to clarify vague business needs, prioritised features via trade-off discussions.