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Viktor Kalashnykov

@viktorkalashnykov

Senior Java Developer at Luxoft Poland, developing a Euro banknote monitoring system and automating its cloud infrastructure.

Poland

Message

At Luxoft Poland, I develop the Java web application for a European system that validates and monitors Euro banknote circulation. I’ve worked on its migration to Java 21 and developed event-driven functionality using RabbitMQ.

I’ve also improved deployment automation for SAP Data Services on AWS, including Terraform scripts and Kubernetes deployment. The work helped improve application stability and infrastructure security.

At Visa Poland, I developed services for a mobile payment system, including event-driven components using Apache Kafka. I deployed services to Google Cloud Platform and contributed to improved code stability and test coverage.

At Fujitsu, I developed SAP infrastructure integrations and a Java management GUI, and led a 10-person team. My work included SAP solutions and high-availability projects; the resume reports a 50% improvement in product revenue.

Experience

Work history, roles, and key accomplishments

Current

Senior Java Developer

Current

Luxoft Poland

Jul 2024 - Present (2 years 3 months)

Developed Java web applications and web services for a European system for validation and monitoring of Euro banknotes. Led the development team, improved CI/CD pipelines, and migrated the project to Java 21.

Java Spring MVC JavaScript Oracle SAP BI SAP Data Services Pl SQL AWS Terraform BASH PowerShell Gitlab CI Python Robot Framework DBT jFrog Wiz Scrum Confluence Jira Go Datadog RabbitMQ

Senior Java Developer

Visa Poland

Mar 2024 - Jul 2024 (4 months)

Developed multiple Java and frontend services for a mobile payment system, ensuring good performance in a distributed system of microservices. Deployed and monitored services on environments and maintained CI/CD tools.

Java Spring MVC Spring Boot Kubernetes Nginx Docker Jenkins React Kafka Google Cloud Platform

Senior Java Software Developer

Luxoft Poland

Aug 2023 - Feb 2024 (6 months)

Deployed and maintained SAP Data Services and SAP BusinessObjects BI Platform on AWS, improved ETL workflows, and prepared Terraform scripts for infrastructure. Improved application stability and security.

Senior Software Developer

Freelancer

Oct 2022 - Aug 2023 (10 months)

Developed an automation orchestration platform for enterprise automation tasks, including web administration console and agent components. Integrated with external systems and improved application architecture and performance.

Senior Software Developer

Fujitsu

Mar 2018 - Jan 2023 (4 years 10 months)

Developed hyperconverged datacenter infrastructure for SAP solutions, including SAP system integration, OS tuning, and automation scripts. Led a team of 10 and improved product revenue by 50%.

Quality Assurance Specialist

Fujitsu

Mar 2018 - Oct 2018 (7 months)

Implemented automatic acceptance tests and automated Vue.js integration tests for a web page for cloud solutions migrations. Extended functionality written in Kotlin.

Java Groovy JavaScript Vue.Js JHipster Spring Boot AWS MySQL Katalon Studio Maven IntelliJ IDEA Docker Gatling Git Kotlin

Quality Assurance Specialist

Comarch

Mar 2017 - Mar 2018 (1 year)

Performed manual end-to-end tests of frontend and prepared automation scripts for REST and SOAP API testing. Also prepared automated UI and performance testing scripts.

JMeter Java BeanShell Groovy Java Selenium Android SVN

Java Software Developer

Comarch

Jun 2016 - Mar 2017 (9 months)

Developed full stack extensions for CRM components, including backend and REST/SOAP API development. Improved application stability and project success.

Java EE Oracle Database SQL Pl SQL EclipseLink Tiles Framework EXT JS Maven Ant Eclipse Web Logic SVN

Education

Degrees, certifications, and relevant coursework

Swiss International Institute Lausanne

Master degree, Artificial Intelligence and Machine Learning

2026 -

Pursuing a Master's degree in Artificial Intelligence and Machine Learning, ongoing since July 2026.

Lodz University of Technology

Master degree, Information Technology

2017 - 2019

Completed a Master's degree in Information Technology with a focus on Intelligent Databases. The program covered AI system development, Android development, database administration, and distributed systems.