Стас

Shumilov Stanislav
Senior Software Engineer
Odesa, Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

Professional Summary
Results-driven Senior Java Engineer with 10+ years of experience building scalable,
high-performance enterprise applications. Expert in the Java ecosystem, including Spring
Boot, microservices, and distributed systems. Able to modernize existing applications and
design new systems from the ground up

Technical Skills

●​ Languages: Java(21), SQL
●​ Frameworks & Libraries: Spring Boot, Spring (MVC, WebFlux, Data, DI),
JPA/Hibernate, JDBC, Elasticsearch
●​ Web Technologies: GWT, Angular (basic experience)
●​ Tools: Maven, Gradle, Git, Docker
●​ Databases: PostgreSQL, MySQL

Professional Experience

Sectigo | Oct 2017 - Present
Senior Java Developer

●​ Independently designed and developed new services while also collaborating with
the team to align on architecture, standards, and integration.
●​ Refactored REST API layer from Spring-integrated JAX-RS (legacy adapter) to
Spring MVC, standardizing controller logic and aligning with modern Spring Web
architecture.
●​ Replaced legacy Hibernate-based data access (manual queries via Session) with
Spring Data JPA, reducing boilerplate code and improving maintainability.
●​ Migrated manual API documentation to automated, test-driven documentation using
Spring REST Docs with Asciidoctor and Maven, ensuring up-to-date, accurate, and
versioned API specs.
●​ Integrated Flyway into the project to manage database migrations, improving
deployment reliability and aligning with CI/CD workflows.

Provectus | Feb 2017 - Oct 2017 (8 month)
Java Developer

●​ Optimized data processing jobs using Apache Spark and Hadoop, reducing rebate
calculation time from 20+ hours to 4 hours.
●​ Implemented API authorization based on Spring Security.

Comodo | Oct 2011 - Feb 2017
Senior Java Developer (Distributed Crawler System) | (2015 - Feb 2017)

●​ Improved database performance by replacing manual connection handling with a
connection pool, significantly reducing query latency and improving throughput.
 ●​ Built a monitoring page to track the status and availability of DigitalOcean droplets via
API integration, enabling easier infrastructure monitoring and faster issue detection.

Junior to Mid-Senior Java Developer (AVS & CWS Web Applications) | (Oct 2011 -
2015)

●​ Developed key features for both front-end (GWT) and back-end (Spring MVC,
Hibernate) components of the AVS platform, contributing to reduction in manual order
validation time.
●​ Contributed to the development and maintenance of the CWS web application for
corporate site statistics, enhancing user experience and data reporting functionalities.

Education
Odessa National Academy of Telecommunication | 2006 – 2011
M.S. in Automation Engineering

Languages

●​ English: Advanced
●​ Ukrainian: Native