Микола Veteran

Mykola Melnyk
Senior Java Backend Developer

Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

Professional Summary
Senior Java Backend Developer with 8+ years of commercial experience building scalable
backend systems and microservices. Strong expertise in Java, Spring Boot, Kafka,
PostgreSQL and AWS. Experienced in distributed systems, asynchronous processing and
event-driven architectures. Currently working in a microservices environment at Playtika.

Technical Skills
Languages: Java (8–21)

Backend: Spring Boot, Spring WebFlux, Hibernate, Spring Data JPA, REST APIs,
Microservices

Messaging: Apache Kafka, ActiveMQ

Databases: PostgreSQL, MySQL, Aerospike

Cloud & DevOps: AWS (S3, Lambda), Docker, Maven, Gradle, Git, GitLab

Testing: JUnit, Mockito, Spring Test

Additional Skills
JavaScript (ES6+), Node.js, React, Next.js — currently studying modern frontend
technologies and building personal projects.

Professional Experience

Senior Java Developer — Playtika (Feb 2020 – Present)
• Designing and developing backend services within microservices architecture
• Implementing asynchronous and reactive client-server communication
• Developing scalable backend services using Java 21 and Spring ecosystem
• Working with Aerospike and AWS services
• Writing technical documentation and designing system components

• Improving reliability and performance of distributed services

Java Developer — SkySoft.Tech (Feb 2018 – Feb 2020)
CyberLabs

• Developed REST APIs for web services
• Integrated Azure SDK services
• Investigated and fixed production issues

The Sphere

• Developed backend services and APIs
• Investigated device compatibility issues
• Maintained and improved system stability

Tidal

• Developed backend APIs for mobile applications
• Integrated payment systems
• Deployed and supported backend services

HighIoT Guardians

• Maintained WiFi security platform
• Implemented new features and refactored legacy components

Education
Vinnytsia National Agrarian University — Faculty of Economics and Entrepreneurship

Additional Training
Advanced Java training including multithreading, REST and SOAP web services, Spring MVC
/ Spring Security, Hibernate / JPA and enterprise application architecture.

Languages
English — B1 (Intermediate)