Oleksii

Oleksii Yakovets
Warsaw, Poland
[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація»)

Professional Summary
Java Backend Developer with 3+ years of experience building scalable, production-grade
applications using Java, Spring Boot, Docker, Kafka, and PostgreSQL. Skilled in designing
RESTful APIs, optimizing backend performance, and integrating event-driven architectures.
Based in Warsaw, open for remote and on-site roles across the EU. Ukrainian citizen with
Temporary Protection — fully authorized to work in the EU.

Skills
- Programming: Java (Core, Maven, Gradle, JUnit 5, Mockito, TestContainers)
- Spring Framework: Boot, Data, Security, AOP, Validation
- DevOps & Tools: Docker (used in production), REST APIs
- Messaging & Event Streaming: Kafka (message handling), RabbitMQ
- Databases & SQL: PostgreSQL, SQL
- Software Architecture: OOP, SOLID, ACID, TDD, DDD

Work History
 Java Backend Developer | DLW (Office — Warsaw)
May 2023 — Present

- Developed a shipping cost automation module, reducing manual operations and improving
partner collaboration efficiency.
- Designed and implemented RESTful APIs for integration with tracking systems,
minimizing manual data entry and accelerating data processing.
- Optimized data flow between microservices, reducing system load and improving overall
operational throughput.

 Java Backend Developer | ForwardVision (Remote — Ukraine)
May 2022 — March 2023

- Developed a backend module for a digital banking platform to manage customer
transactions and real-time account balances.
- Implemented lightweight RESTful APIs using compressed responses and partial data
fetching, reducing payload size and memory overhead.
- Introduced caching with Redis, reducing system response times by up to 70% under high
load.
- Focused on backend performance, lowering the 95th percentile response time from 300
ms to under 100 ms by leveraging caching, sharding, and sticky sessions.
Education
WSB Merito – Warsaw (Currently Studying) | Bachelor of Science in Information and
Communication Technology

Languages
Russian, Ukrainian: Native
English: Intermediate (speaking), Upper-Intermediate (reading/writing)
Polish: Upper Intermediate (B2)