Михайло

Misha Shykoriak
Odesa, Ukraine
Languages Known: English (C1, Advanced), Russian, Ukrainian

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Professional Summary
Java Backend Developer with 4+ years of commercial experience in building enterprise
applications, primarily in the insurance and billing domain. Proficient in Spring Framework,
microservices architecture, relational and NoSQL databases.
Actively improving architectural skills through self-study of Clean Architecture and SOLID
principles. After a focused professional development break, I am ready to bring my experience in
developing scalable backend solutions to a new challenge as a Middle Java Developer.

Certificates
• Provectus Certificate – successfully completed Traineeship as Java Developer. Course Program:
Java 7/8, Spring, Hibernate, MongoDB, REST, Google Maps API.
• EIS Group Certificate – successfully completed “Extreme Course” as Java Developer. Course
Program: Java 8, Databases (Oracle/MSSQL), JSF, Spring, Hibernate.

Education
Incomplete higher education in Computer Science (3 years), Odessa National Maritime University.

Skills
Java (8–22), Spring Framework (Boot + Classic), Hibernate/JPA, REST API, SQL, RDBMS
(PostgreSQL, Oracle, MSSQL), NoSQL (MongoDB, Cassandra), Liquibase, Kafka, RxJava,
Docker, Maven, Git, JUnit, Mockito, Linux (bash).
Good knowledge of SOLID principles and Clean Architecture (studied through Robert C. Martin’s
book and Udemy course). Familiar with Domain-Driven Design and Event-Driven Architecture.

Employment History
Career Break
January 2022 — March 2026
Dedicated time to intensive self-improvement and professional upskilling: deep dive into Clean
Architecture, SOLID principles, DDD, and modern Java ecosystem through books, courses, and
personal projects to stay current with industry best practices.
Middle Java Developer
Exigen Insurance Solutions
July 2018 — January 2022
• Developed and deployed a critical batch job that inverted all invalid transactions on billing
accounts and insurance policies, correcting data corruption caused by a production bug. Delivered
independently and rapidly, ensuring data integrity and preventing financial inconsistencies.
• Developed RESTful APIs using Java 8/11, Spring Framework and Hibernate.
• Worked in microservice architecture using RxJava, Kafka, Cassandra and Docker.
• Wrote unit and integration tests using JUnit and Mockito.
• Created and maintained database scripts for PostgreSQL, Oracle and MSSQL using Liquibase.
• Participated in code reviews, sprint planning and implementation of new features according to
business requirements.
Junior Java Developer
Mobster Agency
February 2018 — July 2018
• Built HTTP client functionality from scratch using native Java (HttpURLConnection / sockets) for
integration with third-party services.
• Implemented multithreading and concurrency mechanisms to optimize backend performance and
handle higher load.
• Deepened expertise in Java 8, concurrent programming and NoSQL databases.
Trainee Java Developer
Provectus
July 2017 — December 2017
Developed backend for the mobile application Public Transport (Odesa), published on Google Play.
• Implemented CRON jobs for checking data relevance.
• Developed caching system for transport locations to reduce server load.
• Created REST APIs for routes, stops and real-time transport tracking.
• Wrote unit and integration tests using JUnit and Mockito.