Kostiantyn Vorobiov
Java Software Developer at Azon5
Ukraine
Summary
🤩
Rockstar🎓
Top SchoolKostiantyn Vorobiov is a Java backend developer with five years of experience building high-load, reactive microservices for fintech, including a payment platform that processed 5,000+ TPS. He specializes in Java 8+, Spring Boot, Spring WebFlux, R2DBC, Kafka, Redis and Keycloak, and has hands-on experience optimizing PostgreSQL for large datasets. Kostiantyn led the migration from imperative to reactive architecture, improving throughput by up to 2× and cutting request latency by ~20%. He has integrated multiple payment gateways (Stripe, Nomypay, Sipay, Fastpass), implemented custom monitoring for faster failure analysis, and mentored new engineers to accelerate onboarding. Based in Ukraine, he pairs strong operational discipline with a continuous-learning mindset and a background in engineering that contributes to systematic, performance-focused designs.
5 years of coding experience
5 years of employment as a software developer
Master's degree, Specialty of Building Engineer, Master's degree, Specialty of Building Engineer at DNIPROPETROVSK NATIONAL UNIVERSITY OF RAILWAY TRANSPORTJava Backend Development course, Java Backend Development course at Mate academy
Ukrainian, EnglishProgramming languages (3)
Github contributions (5)
KostiantynVorobiov/Internet-shop
Sep 2020 - Oct 2020
Contributions:59 reviews, 24 PRs, 32 pushes in 1 month
KostiantynVorobiov/My-own-project2-Cinema
Sep 2020 - Nov 2020
Contributions:20 reviews, 21 PRs, 27 pushes in 1 month
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