Олексій

Oleksii (Alex) Tkachenko
JAVA BACKEND DEVELOPER
Previous Team Lead Experience • FinTech

PROFESSIONAL SUMMARY
Java Backend Developer with 13+ years of commercial experience
CONTACT building enterprise backend solutions for FinTech. Combined hands-on
development with Team Lead responsibilities, mentoring engineers and
• Bratislava, Slovakia
collaborating directly with customers. Seeking a primarily hands-on
• alex.tkachenko.od@gmail.
engineering role focused on Java, Spring Boot, REST APIs and scalable
com
backend systems.
• [open contact info](look above in the "contact info" section)
• [open contact info](look above in the "contact info" section) PROFESSIONAL EXPERIENCE
SKILLS Provectus Inc. — Team Lead / Java Developer
Nov 2018 – Present | FinTech | Team size: 12
• Java, Kotlin
• Spring Boot, Spring MVC, • Combined hands-on backend development with technical leadership
Hibernate for a distributed engineering team.
• REST APIs, Microservices, • Designed and implemented scalable Java/Spring Boot backend
Kafka services and REST APIs.
• PostgreSQL, MySQL, • Worked directly with enterprise customers to clarify requirements
Oracle, MongoDB and deliver reliable backend solutions.
• Docker, Kubernetes • Investigated production issues, optimized application performance,
• Maven, Gradle, Git and improved system stability.
• JUnit, Mockito
• Performance Provectus Inc. — Java Developer
Optimization Jan 2014 – Nov 2018 | FinTech | Team size: 10–15
• Production Support
• Developed enterprise backend applications using Java and Spring.
• Cursor, Claude Code
• Designed and maintained REST APIs for financial systems.
LANGUAGES • Implemented new business functionality and integrated third-party
services.
• English • Optimized SQL queries and participated in production support.
• Ukrainian
Provectus Inc. — Managed Services Engineer
• Russian
Dec 2012 – Jan 2014 | FinTech | Team size: 6
• Slovak
• Supported financial platforms in production environments.
• Resolved production incidents and collaborated with development
teams to improve system reliability.

EDUCATION
Odesa National Academy of Telecommunications
Master's degree in Telecommunication Software Engineering