Ihor

IHOR HRYNIV
Senior Java Developer
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | in/hryniv-ihor | Kyiv, Ukraine

SUMMARY SKILLS
Senior Java Developer with expertise in building scalable microservices and event-driven Languages
systems using Spring and Kafka. Strong focus on architectural best practices, API design Java 17+, Groovy, TypeScript,
(REST/GraphQL), and DevOps automation (CI/CD, Docker) to deliver reliable, high-quality JavaScript,, PHP
software solutions. Databases​
EXPERIENCE MySQL, SQL, PostgreSQL

Senior Java Software Engineer Frontend​
HTML, CSS, JavaScript, TypeScript,
ProfiRealt React, JSP
09/2024 - Present
Development of a distributed modular system built on independent services for leads,
CI/CD​
buyers, realty, tasks and authentication TeamCity, Jenkins
●​ Designed and enforced a standardised modular architecture, which reduced new Cloud​
service setup time by 40% and streamlined the onboarding process. AWS (S3)
●​ Engineered a fault-tolerant notification microservice with advanced retry policies,
Frameworks​
ensuring 100% delivery reliability for critical business alerts (leads, tasks) and
Spring, Spring Boot, React, Next.js,
eliminating message loss.
Hybris (legacy experience)
●​ Spearheaded the backend development, implementing the majority of core
REST/GraphQL endpoints and defining service boundaries for key business domains Technologies​
●​ Containerised services with Docker, maintained CI/CD (Jenkins) Apache Solr, Git, JUnit, Ant, Maven,
●​ Integrated backend services with React/TypeScript client interfaces Docker, Tomcat, XML, Kafka, GraphQL

Java Software Engineer Tools​
IntelliJ IDEA, Postman, Docker Desktop,
Techwave
Jira, Confluence, Git, GitLab, Bitbucket,
12/2022 - 09/2024
WebStorm, pgAdmin
Backend development across several enterprise systems with a focus on stability,
automation and integration Other​
●​ Designed a scalable modular architecture, establishing a rigid foundation for future Shell Script,
microservices migration Linux Administration (basic)
●​ Engineered TeamCity CI/CD pipelines, achieving a 60% reduction in deployment time
through advanced automation
●​ Optimised SQL workflows, reducing query execution time by 40%
●​ Automated environment configuration and deployment flows
●​ Ensured production stability and resolved high-priority issues

Java Software Engineer
Customertimes
12/2019 - 09/2022
Development and optimisation of backend integrations in high-load environments
●​ Implemented robust marketplace and POS integrations
●​ Diagnosed and resolved a critical deadlock, recovering tens of thousands of stuck
orders and restoring revenue streams without data loss
●​ Enhanced service reliability through monitoring and refinements
Early Career Roles - Java Software Engineer
Mobilunity, EPAM
12/2018 - 12/2019
●​ Worked on Java backend features and integration tasks
●​ Contributed to the development of Java modules within a distributed team
●​ Assisted in stabilising deployment pipelines

LANGUAGES
Ukrainian ⬤⬤⬤⬤⬤ English ⬤⬤⬤⬤⬤
Native Upper-Intermediate