Andrii Kotelnikov

Experience

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  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)

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  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