Sergii K. Java Developer

Work Experience

Java Developer, Undisclosed Project

Jul 2023 - Feb 2024
Summary: Participated in discussions for project improvement, feature implementation, and technology update methodologies.
Responsibilities: Take part in discussions of project improvements, implementing new features, bug fixing, and providing new technologies and methodologies.
Technologies: Java17, Spring Boot, Spring Data, Hibernate, Liquibase, MariaDB

Java Developer, API Gateway, and Enterprise Service Bus

Jan 2020 - Dec 2022 
Summary: Designed API solutions and integration architecture for microservices in the telecommunications sector.
Responsibilities: Design, analyze, and implement new features for the API Gateway solution and Enterprise service bus between company backend systems and inner and outer customers. Building architecture solutions for the new microservices and integrating that into the existing ecosystem which deploys into the Kubernetes cluster.
Technologies: Spring, Spring Boot, Spring Data, Hibernate, Elasticsearch, Akka, Docker, Oracle, microservices.

Java Developer, Language localization and translations

Jul 2018 - Dec 2019
Summary: Implemented and improved unified delivery platform for seamless data workflows between different CRM platforms, customized ORM for business model data, and enabled cloud deployment (AWS).
Responsibilities: as a Java developer implemented and improved unify delivery platform which provides work with data between two different CRM platforms. Customized the high-level abstraction of ORM for business model data. Implementation of the stage deploying into the cloud environment (AWS).
Technologies: Spring, Spring Boot, Spring Data, Spring Cloud, Hibernate, Elasticsearch, GraphQL, Docker, MySQL, Oracle, AWS

Java Developer, SaaS Components for Sales Quotes

Sep 2017 - Jul 2018
Summary: Designed and implemented SaaS components for sales quotes, discounts, and SSO integration.
Responsibilities: Designed and implemented the SaaS components which were responsible for the sales quotes, discounts, and SSO.
Technologies: Spring, Spring Boot, Spring Data, Spring Cloud, Hibernate, Oracle

Java Developer, VAS Products Development

Jul 2015 - Sep 2017
Summary: Developing and maintaining VAS products, integrating technological improvements.
Responsibilities: Developing and Maintenance of VAS (value-added services)
Technologies: Java 6,7,8, EJB, JPA, Web Services (SOAP, REST), Spring, Spring Boot, Spring Data, Hibernate, Oracle, PL SQL, JBoss WildFly

Software Engineer 3rd category, PDM/CAD Systems Customization

Sep 2012 - Jul 2015
Summary: Customized PLM/CAD systems for enterprise needs and enabled software programming.
Responsibilities: Customization (adjustment and programming) of PDM/CAD systems - Teamcenter/NX
Technologies: Java 6,7, JSP, Eclipse Workbench

Software Engineer, Academy Site Support and Software Development

Sep 2011 - Sep 2012
Summary: Administration and support of academy site, software development for internal affairs education.
Responsibilities: Administer and support the academy site; software development.

Developer, Booking Service

Responsibilities: Connecting a bonus pack of roaming minutes to the user.
Technologies: Spring Boot, JDBC Template, Oracle, POI, JavaEmail

Developer, Ussd for OKPO

Responsibilities: Takes order of report type, makes and sends results to the subscriber.
Technologies: Jboss7, Spring Boot, JPA, Oracle, POI, JavaEmail

Developer, AntiSilent

Responsibilities: Developer for the AntiSilent project.
Technologies: Spring Boot, Oracle, Hibernate, SOAP

Education

• Specialist diploma of the National Technical University of Ukraine "KPI", Physical-Technical Institute
  "protection of information against unauthorized access to computer systems and networks"
  6 years