Ігор

Ihor Romanovskyi
Senior Java Developer
15+ years experience · Healthcare & Enterprise
Email: [open contact info](look above in the "contact info" section)
Phone: [open contact info](look above in the "contact info" section)
Location: Ivano-Frankivsk, Ukraine
Open to: Remote (Europe & USA)
LinkedIn: [open contact info](look above in the "contact info" section)
PROFESSIONAL SUMMARY
Senior Java Developer with 15+ years of experience building enterprise and healthcare software. Core strengths include Java, the Spring ecosystem, microservices, and AWS, with a track record of architecting scalable backend systems, mentoring developers, and driving technical quality across the full SDLC. Oracle Certified Java Professional with hands-on experience in distributed systems, Kafka-based event streaming, Docker, and CI/CD pipelines. Uses AI-assisted tools like GitHub Copilot and ChatGPT/Claude to speed up development and improve code quality. Turns complex business requirements into clean, maintainable solutions within Agile teams.
CORE COMPETENCIES
Technical Leadership · System Architecture · Microservices Design · Performance Optimization · CI/CD Pipelines · Cloud (AWS) · Healthcare IT · Agile/Scrum · Code Review & Mentoring · REST API Design
TECHNICAL SKILLS

Languages
Java 8, Java 17 (hands-on); familiar with Java 11, 21 language features; SQL, JavaScript, HTML/CSS
Frameworks
Spring Boot, Spring MVC, Spring Security, Spring Data, Spring Cloud, Hibernate, JPA, ZK Framework, ExtJS
Microservices
Docker, Kubernetes (exposure — deployments & scaling concepts), REST, Apache Kafka, RabbitMQ
Cloud & DevOps
AWS (S3, Lambda, API Gateway), Jenkins, GitLab CI/CD, Maven, Gradle, Ant
Databases
PostgreSQL, Oracle, MS SQL Server, MySQL, MongoDB, H2, Sybase, IBM DB2
Testing
JUnit 5, TestNG, Mockito, Postman, Gatling, JaCoCo
Monitoring
JProfiler, SonarQube, CheckStyle, PMD, FindBugs
Tools & IDEs
IntelliJ IDEA, Git, GitLab, Confluence, Jira, Enterprise Architect, OpenGrok
AI Tools
GitHub Copilot, ChatGPT / Claude (code review & generation)
Methodologies
Agile, Scrum, Waterfall, TDD, BDD, Pair Programming, Feature-Driven Development

PROFESSIONAL EXPERIENCE
Senior Java Backend Developer | SoftServe
January 2020 – Present (5+ years) · Team: 19 people
Hospital Information System · German Healthcare Client
Large-scale monolithic HIS managing all hospital workflows: patient registration, medication management, diagnostics, location tracking, and care planning. The system was built on a modular platform architecture serving multiple clinical departments across hospitals.
• Architected and led development of core backend modules used by 10+ clinical departments, reducing bug regression rate by ~30% through design pattern enforcement and rigorous code reviews.
• Established mentoring program for 5 junior/mid developers; conducted 20+ knowledge-sharing sessions on clean code, SOLID principles, and Java best practices.
• Performed requirements analysis and grooming with the German client’s product team, reducing sprint scope-creep by ~25%.
• Optimized critical SQL queries and Hibernate N+1 issues, achieving ~40% performance improvement on high-traffic patient search endpoints.
• Maintained and extended JasperReports-based reporting engine, delivering 15+ new clinical reports for billing and care management.
• Led migration of core modules from Java 8 to Java 17, adopting records, pattern matching, and updated language features to reduce boilerplate and improve maintainability.
Stack: Java 8/17, Spring Boot, Spring MVC, Hibernate, Oracle, MS SQL, H2, TestNG, Mockito, Jenkins, Maven, JasperReports, Docker, GitLab, Jira, Confluence, IntelliJ IDEA, Scrum
Senior Java Backend Developer | SoftServe
~2018 – 2020 (1 year 11 months) · Team: 23 people
Cloud Analytics Platform · US Enterprise Client
Cloud-native microservices platform providing real-time call statistics and analytics for enterprise messaging tools (Cisco, Webex). Event-driven architecture built on Kafka processed millions of call events per day with strict latency requirements.
• Designed and implemented Kafka-based event streaming pipeline ingesting 5M+ events/day from multiple enterprise messaging sources with sub-second end-to-end latency.
• Built Kafka consumers and producers for real-time aggregation of call statistics, enabling live dashboards for enterprise clients.
• Tuned PostgreSQL queries and JOOQ-based data access layer, reducing average query response time by 60%.
• Implemented load testing strategy using Gatling, identifying and resolving 3 critical bottlenecks before production release.
• Containerized services with Docker, enabling consistent and reproducible deployments across dev/staging/prod environments.
Stack: Java 8/11, Spring Boot, Apache Kafka, PostgreSQL, JOOQ, Docker, Gradle, Jenkins, JUnit, Gatling, Git
Java Backend Developer | SoftServe
~2017 – 2018 (9 months) · Team: 7 people
Mobile App Backend — Receipt Processing Service · US Client
• Built AWS-based receipt ingestion pipeline: API Gateway → Lambda → S3 → ABBYY OCR → Sybase storage.
• Integrated third-party OCR providers (ABBYY, Xtracta), achieving 95%+ receipt recognition accuracy.
• Designed fault-tolerant retry and dead-letter mechanisms for external service failures, improving uptime to 99.5%.
Stack: Java, Spring, AWS (S3, Lambda, API Gateway), Sybase, Tomcat, WebSphere, Jenkins, Git
Java Software Engineer | SoftServe
~2015 – 2017 (1 year 10 months) · Team: 15 people
SQL Safe & SQL Inventory Manager · US Client
• Led Java UI team for enterprise SQL Server backup & monitoring tools used by Fortune 500 companies.
• Built real-time dashboard for SQL Server inventory with automated discovery of 500+ server instances.
• Optimized backup scheduling algorithms, reducing configuration time by 35% for enterprise administrators.
Stack: Java, ZK Framework, MS SQL, Tomcat, Maven, Ant, Jenkins, Git
Java Software Engineer | SoftServe
~2013 – 2015 (2 years 8 months) · Team: 5–9 people
Denial Management (Healthcare) & Enterprise Social Network · US Clients
• Developed backend for 835 remittance data analysis enabling denial trend reporting and revenue optimization for US hospital billing teams.
• Built features for a secure enterprise social network with Spring Security, Oracle, and RESTful APIs.
Stack: Java, Spring, IBM DB2, Oracle, JUnit, TestNG, JasperReports, Maven, Jenkins, Tomcat
Java Software Engineer | SoftServe
~2011 – 2013 (1 year 7 months) · Team: 6 people
Multi-Channel Commerce Platform · Global 1000 US Client
• Developed high-traffic B2C/B2B e-commerce backend components supporting call center and online selling channels.
• Implemented code quality toolchain (Emma, FindBugs, PMD, CPD), reducing defect rate by 20%.
Stack: Java, Spring, MySQL, Oracle, JUnit, Tomcat, Ant, SVN
CERTIFICATIONS
• Oracle Certified Professional, Java Programmer (OCPJP) — 2012
• Oracle Certified Associate, Java SE 8 Programmer (OCA 1Z0-808) — 2017
EDUCATION
Master's Degree, Computer Systems and Networks
Institute of Management and Economics "Galician Academy" · Ivano-Frankivsk, Ukraine
LANGUAGES
Ukrainian — Native English — Professional Working Proficiency (B2+)