Олександр

Oleksandr Abakumov
Kyiv, Ukraine​
[open contact info](look above in the "contact info" section)​
[open contact info](look above in the "contact info" section)

Senior Java Backend Developer
Senior Java Developer with 19+ years of experience in enterprise software development,
distributed systems, and Kafka-based integration solutions.

Strong background in backend development using Java and Spring Boot, with hands-on
experience in AWS, Kubernetes, CI/CD pipelines, and large-scale enterprise integrations for
international customers.

Focused on reliability, maintainability, performance optimization, and production support of
high-load backend systems.

Technical Skills
Backend Development
●​ Java 8-25
●​ Spring Boot
●​ Spring Data
●​ Hibernate
●​ REST APIs

Messaging & Data
●​ Apache Kafka
●​ Avro / Schema Registry
●​ PostgreSQL / MySQL (Aurora DB by AWS)

Cloud & DevOps
●​ AWS (IAM, Lambda, S3, EC2, Aurora DB, Elastic Beans Talk), Kubernetes
●​ GitHub Actions, GitLab CI/CD
●​ Gradle / Maven, Docker
Testing & Quality
●​ JUnit / Mockito / PowerMock
●​ Postman / CURL / Swagger
●​ K6 (used for load testing)

Monitoring & Operations
●​ Splunk (alerts, queries)
●​ New Relic (alerts, dashboards, etc.)
●​ Pager Duty integration

Additional
●​ Git / GitLab / GitHub
●​ GoF Design Patterns
●​ Knowledge transfer sessions, mentoring

Professional Experience
Luxoft — Senior Java Developer
October 2019 – May 2026

Supply Chain domain projects for a major US retail company.

Responsibilities & Achievements

●​ Developed Kafka-based backend integration services
●​ Built and supported data pipelines including HTTP-to-Kafka, DB-to-Kafka, and
Kafka-to-Kafka integrations
●​ Participated in migration from GitLab CI/CD to GitHub Actions
●​ Worked with AWS and Kubernetes-based deployments
●​ Performed production investigations and troubleshooting activities
●​ Configured monitoring, alerts, and operational dashboards
●​ Collaborated directly with onsite teams, managers, and stakeholders
●​ Conducted demos and knowledge transfer sessions

Technologies

Java 8-25, Spring Boot, Kafka, AWS, Kubernetes, GitHub Actions, GitLab CI/CD, Gradle, Splunk,
New Relic
Team Harbour — Java Developer
January 2018 – October 2019

Backend development for projects in banking and real estate domains.

Responsibilities

●​ Developed Spring Boot backend applications (mainly they were Spring based REST
services + Hibernate)
●​ Designed and implemented REST APIs
●​ Worked with PostgreSQL and MySQL databases
●​ Supported integration and testing activities

Technologies

Java 8-11, Spring Boot, Gradle, Maven, PostgreSQL, MySQL, Swagger, Postman

Samsung R&D Center — Java Developer
January 2017 – January 2018

Backend development for Tizen policy management platform.

Responsibilities

●​ Developed backend services using Spring Boot and Hibernate
●​ Implemented authentication and authorization logic using Spring Security Framework)
●​ Participated in IoT-related platform development
●​ Worked in an international development environment

Technologies

Java, Spring Boot, Hibernate, Spring Security, TeamCity, IoT technologies
EPAM Systems — Java Developer
September 2015 – January 2017

Online ticket and event booking platform.

Responsibilities

●​ Developed backend services for booking platform
●​ Implemented new functionality and fixed production issues
●​ Worked with AWS-based infrastructure
●​ Participated in daily communication with distributed international teams
●​ Contributed to BDD testing activities

Technologies

Java 8, Spring Boot, Hibernate, AWS, Lombok, YAML, BDD testing

Luxoft — Java Developer
April 2013 – June 2015

Enterprise backend development for bank corporate systems.

Responsibilities

●​ Development and maintenance of business logic components

Technologies

Java 7, Scala, .NET, WebLogic 12

Codeminders — Java Developer
October 2011 – February 2013

Development of SIP-related web platform and communication services.

Responsibilities

●​ Backend and frontend development for communication platform
●​ Worked with multithreading and web technologies
●​ Participated in development of Skype-like application

Technologies

Java 7, JavaScript, jQuery, Yahoo UI, Apache Ant
Luxoft — Java Developer
October 2010 – October 2011

Development of a monitoring platform for renewable energy resources for AREVA France.

Responsibilities

●​ Developed AJAX-based monitoring web application
●​ Worked with SmartGWT and MVP architecture
●​ Participated in UI and backend integration

Technologies

Java, GWT, SmartGWT, AJAX

Relevant Traffic SE — Java Developer
September 2009 – October 2010

Development of a web platform for electronic advertising.

Technologies

J2EE, JSF, Spring IoC, Bash, Unix tools, cron

Mirasoft — Java Developer
July 2008 – August 2009

Development of web systems for healthcare and medical insurance domain.

Technologies

JSF, IceFaces, CSS, HTML, JavaScript

Luxoft — Java Developer
April 2007 – July 2008

Development of a web platform for bonds trading and securities.

Technologies

Java, J2EE, Spring Framework, JSF, Oracle, jUnit, jMock, Ant, Perforce
Education
National Technical University of Ukraine “Kyiv Polytechnic
Institute”
Specialist Degree in Automated Controlling Systems​
Graduated: June 2005

Certifications & Additional Education
●​ Coursera — “Functional Programming Principles in Scala” (Certificate with Distinction)
●​ EPAM English Classes
●​ New Stream English School
●​ Luxoft Udemy Courses (AWS, Kubernetes, Terraform)
●​ English self education using AI tools

English
Intermediate / Upper-Intermediate working proficiency.​
Experience in daily communication with international teams.

Additional Information
●​ Driver license: Category B
●​ Hobbies: cycling, retro gaming, guitar, family trips