04/22/2025 updated

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100 % available

Software Engineer, Java Developer

Icod, Spain (Canary Islands)
Only remote
Computer Science
Icod, Spain (Canary Islands)
Only remote
Computer Science

Profile attachments

Oleksandr_Korzhenko_CV.pdf

Java (Programming Language)JavaScriptAmazon Web ServicesAutomationTest AutomationMicrosoft AzureBusiness RequirementsCloud ComputingDatabasesContinuous IntegrationJava Platform Enterprise Edition (J2EE)Infrastructure ManagementSpring FrameworkPython (Programming Language)PostgreSQLMicrosoft SQL ServersMySQLBackendGitLabKubernetes
Experienced Software Developer | Backend Specialist
Seasoned software developer with over 15 years of experience in development, including 8 years in commercial Java development. My expertise lies in backend development, where I focus on building scalable, high-performance solutions.
I have worked extensively on commercial projects, utilizing the following technologies:
  • Backend Development: Java EE, Spring Framework
  • Databases: MS SQL, MySQL, PostgreSQL
  • Cloud & Infrastructure: Kubernetes, AWS, Microsoft Azure
  • CI/CD & Automation: Complex pipelines with GitLab, automated testing
  • Additional Technologies: Python, JavaScript, Go
I specialize in designing and developing efficient solutions tailored to business needs, ensuring high-quality support and long-term maintainability. Let’s build something great together!

Experience

Professional experience10+ years
Freelancer since2016

Languages

EnglishFluentSpanishBasic knowledge

Project history

Software Engineer, Backend Developer

HERE Technologies

Automotive & Vehicle Manufacturing

1000-5000 team member

Developed and maintained a core service for map-making, location technologies, and automotive services. This microservices-based platform serves Apache Spark and Flink applications utilizing Kubernetes.
Key Responsibilities & Achievements:
  • Designed and implemented new API versions, ensuring backward compatibility.
  • Developed new microservices and supporting applications based on project requirements.
  • Refactored data structures while maintaining data integrity and compatibility.
  • Analyzed requirements, defined tasks, and created related technical documentation.
  • Worked extensively with Kubernetes (k8s) for deployment and management.
Technologies:
Java (8-17), Jersey, Scala, PostgreSQL, JUnit, Cucumber, OpenAPI, REST API, Git, distributed GitLab CI/CD, Python (Pandas), Kubernetes, Splunk, Go.

Software Engineer, Backend Developer

Major Ukrainian Telecom Operator

Internet & IT

>10.000 team member

Developed and supported a B2B application for the client's partners, enabling specific business functionalities (e.g., order management, reporting).
Key Responsibilities:
  • Backend development and feature implementation using Java and Spring Boot.
  • Database design and interaction (MySQL, Oracle).
  • API development and integration.
  • Collaboration on frontend integration (React Native/JS).
  • Maintenance and support of the application.
Technologies:
Java (8, 11), Spring Boot, Spring MVC, Spring Data, Spring Security, Hibernate, MySQL, Oracle DB, Scala, Gradle, REST API, Git, GitLab CI/CD, React Native, React JS.

Software Engineer, Java Backend Developer

Quince

Goods & Retail

50-250 team member

Developed a new e-learning platform for a major global electronics manufacturer.
Key Responsibilities & Achievements:
  • Collaborated on feature requirements, design, and implementation for the platform.
  • Designed and implemented a new reporting system using Google BigQuery, including data migration and consolidation from various sources.
  • Developed RESTful APIs and designed database schemas (MySQL, MongoDB/DocumentDB).
  • Architected and provisioned core AWS cloud infrastructure components (ECS, RDS, DocumentDB).
  • Established CI/CD pipelines using GitLab CI/CD to automate build, testing, and deployment processes.
  • Refactored existing code for improved performance and maintainability.
  • Implemented Single Sign-On (SSO) capabilities.
Technologies:
Java 8, Spring Boot (1.5.x), Spring MVC, Spring Data, Spring Security, Hibernate, MySQL, AWS RDS, MongoDB, Amazon DocumentDB, Google BigQuery, SSO, Gradle, AWS ECS, REST API, Git, GitLab CI/CD.

Certificates

Developing Applications with Google Cloud Platform

Coursera

2019

Architecting with Google Cloud Platform

Coursera

2019


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