Nikolaos Kantartzopoulos

Delivers Java/Spring Boot backend features from implementation through production, working across REST APIs, persistence and service integrations in a microservices environment. Investigates, deploys and troubleshoots services using logs, runtime diagnostics, GitHub Actions, Helm and Kubernetes.

Built REST API features with Spring Boot, JPA/Hibernate and JDBC, following layered/DDD-oriented design. Improved data-access behavior through PostgreSQL query/index analysis, resolving issues such as N+1 queries; implemented Caffeine/Redis caching and worked with Kafka-based integrations.

Built a production website from the ground up under senior guidance using Next.js, React and TypeScript, implementing advanced filtering, iframe integrations and headless CMS content while collaborating closely with senior engineers and UX.

Provided administrative support at a medical center, handling clerical and organizational tasks.

Founded and operated a tango school, providing instruction and education in tango dance.

Pursued physics studies at the University of Patras from 2006 to 2009.