Andrii Kotelnikov

Andrii Kotelnikov

Java, Javascript developer

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location of Andrii KotelnikovOpole, Opolskie, Poland

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  • Timeline

  • About me

    Closed for opportunities. Senior Java developer, Full-stack developer

  • Education

    • National Technical University of Ukraine 'Kyiv Polytechnic Institute'​

      2003 - 2009
      Master's degree Technical information security
  • Experience

    • Visicom

      Oct 2017 - Oct 2021
      Java, Javascript developer

      multiple sites with following stack: - back-end - Java (Servlets, Tomcat, Spring, Hibernate, PostgreSQL, SQLite)- front-end - Javascript (VanillaJS, Vue.js, D3.js, Leaflet.js)stand-alone Windows application using Electron (electron-vue, Webpack)REST API with billing system (Java - Vert.x, PostgreSQL)site for POI aggregation:- back-end - Java (Servlets, Nashorn, Tomcat, SQLite)- front-end - Javascript (VanillaJS, D3.js, Leaflet.js)

    • Intellias

      Oct 2021 - Dec 2024
      Senior Java Developer

      High-load telecom system. Stack: Microservices, Java (8, 17), Vert.x, Spring, Hibernate, Docker, docker-compose, Kubernetes, Helm, OpenAPI (with code generation for RPC), Karate (testing), Jenkins, Git (Bitbucket), Jira, AgileTasks: add new features, create new endpoints, fix bugs, e2e testing on clusterHigh-load billing data processing system. Stack: Java (8, 17), Kafka, Kafka Streams, Kafka Connectors, Docker, Kubernetes, Helm, CQEngine, AWS, Litmus (resiliency testing), Jenkins, Git (Bitbucket), Kerberos authentication, Jira, AgileTasks: add new features, performance optimisations, fix bugs, performance testing on cluster, resiliency testing on cluster Show less

  • Licenses & Certifications