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Vladyslav Liubachevskyi

@vladyslavliubachevsk1

Senior Java Engineer at Aspira.global who optimized real-time data services and built FinTech payment systems.

At Aspira.global, I worked on a distributed Java platform that collected and normalized real-time data from more than 40 external sources. I diagnosed performance and stability issues in long-running Kubernetes services, using VisualVM to inspect JVM heap and threads.

At Maxpay, I built a card transaction limits system with real-time enforcement and rollback handling, and integrated Visa and Mastercard processing. At TASCOMBANK, I migrated core banking logic from Oracle PL/SQL into a Java service and built a bulk payroll payments system.

On my ParseKeep side project, I built and operated a Java and Spring Boot service for real-estate market analytics, including its REST API, MySQL data layer, payment integration, and Kubernetes deployment. Earlier, I built a Docker plugin for IntelliJ IDEA at Viatra2 s.r.o.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Aspira.global

Oct 2025 - Jun 2026 (8 months)

Senior engineer on a distributed Java platform collecting and normalizing high-volume data from 40+ external sources in real time. Diagnosed and resolved production performance issues and runtime stability defects in long-running Kubernetes services.

Java Spring Boot Redis Liquibase Kubernetes Helm Grafana Loki VisualVM Distributed Systems Real time Data Processing

Senior Software Engineer

Skai

May 2022 - Aug 2025 (3 years 3 months)

Maintained and evolved a large monolithic production platform and drove its gradual decomposition into microservices. Sole owner of end-to-end integrations for three new advertising platforms (LinkedIn, TikTok, Instagram Ads).

Java Spring Framework RabbitMQ Kafka Kubernetes Jenkins GitHub Actions Microservices Integration Code Review Mentorship

Senior Java Developer

Maxpay

Feb 2020 - May 2022 (2 years 3 months)

Built the card transaction limits system from scratch with real-time enforcement and rollback handling. Integrated and maintained card payment processing via a payment provider (Visa/Mastercard) and contributed to SEPA payments implementation.

Java Payment Processing Visa Mastercard SEPA Transaction Limits REST APIs

Solution Architect

ITernal Group

Aug 2020 - Nov 2020 (3 months)

Prepared a Proof of Concept for 24/7 bank payments for Raiffeisen Bank Aval.

Architecture Proof of Concept Banking Payments

Java Software Developer

TASCOMBANK

Feb 2018 - Feb 2020 (2 years)

Migrated core banking logic from Oracle/PL/SQL to a PostgreSQL-based Java service. Built a mass payments system for bulk salary disbursements and designed REST APIs for web and mobile banking.

Java PostgreSQL Oracle Pl SQL Spring Security OAuth JWT SSO Hibernate JPA Liquibase REST APIs

Java Developer

Jetforcer s.r.o.

Apr 2014 - Mar 2018 (3 years 11 months)

Worked on an IntelliJ-based IDE for the Salesforce platform and implemented integration with the Salesforce API for retrieving platform objects.

Java IntelliJ Plugin Development Salesforce API

Java Developer

Viatra2 s.r.o.

Feb 2011 - Apr 2014 (3 years 2 months)

Built the first version of a Docker plugin for IntelliJ IDEA, adding UI support for Docker Compose and a tree view of containers and images. Developed site-specific parsers for a data-scraping system.

Java IntelliJ Plugin Development Docker Docker Compose Data Scraping