Contact information

You can get this candidate's contact information from https://www.work.ua/resumes/10359248/

Work experience

Java Backend Developer

from 01.2025 to now (1 year 10 months)
Affilio-Osa, Київ (IT)

Developed and maintained a production SaaS platform for affiliate marketing, implementing new features, REST APIs, business logic, and integrations with external services. Worked with access control, caching, asynchronous processing, rate limiting, and scheduled tasks. Mentored junior team members and provided technical guidance.

Key Achievements:
Redesigned the report generation approach using a more efficient graph-based architecture, improving performance by 3×.
Reduced peak database load from 95% to 60% by optimizing tenant job scheduling.
Reduced query execution time from 150–200 ms to ~40 ms through database optimization.
Reduced the execution time of an asynchronous Excel report generation task by 60%.
Integrated 200+ external services and introduced dynamic integration configuration, reducing the need to redeploy integration services for configuration changes.
Achieved 100% controller and ~80% service test coverage and established continuous testing of new functionality.

Trainee Full Stack Developer

from 11.2022 to 04.2023 (6 months)
ProfITsoft, Дистанційно (IT)

Participated in an intensive developer training program focused on FinTech web application development.
Developed features as part of a team and participated in the full development lifecycle.
Received regular code reviews and technical guidance from experienced developers.

Programming teacher

from 08.2022 to 12.2024 (2 years 5 months)
Young Coder School, Дистанційно (Освіта, наука)

Taught programming fundamentals, algorithms, data structures, and object-oriented programming.
Guided students in developing projects, debugging code, and improving their solutions.

Education

National University of Life and Environmental Sciences of Ukraine

Software Engineering, Київ
Unfinished higher, from 2022 to 2025 (3 years)

Cherkasy State Business College

Computer Engineering, Київ
Specialized secondary, from 2018 to 2022 (4 years)

Knowledge and skills

• Java
• SQL
• Spring Boot
• Spring Framework
• PostgreSQL
• JUnit
• Mockito
• Apache Maven
• Docker
• Git
• Postman
• HTML
• CSS
• Hibernate
• Google Cloud Platform
• REST API
• Apache Kafka
• Redis
• WebSocket
• Flyway

Language proficiencies

• Ukrainian — fluent
• English — average

Additional information

Java Backend Developer focused on building and improving production backend systems. Experienced in implementing complex business logic, optimizing system performance, integrating external services, and troubleshooting production issues. Strong in database optimization and improving the efficiency of existing solutions.