Dmytro

DMYTRO LEMESHCHENKO
Java Backend Developer

Odesa, Ukraine (Remote)
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https://t.me/dimmonishe

PROFESSIONAL SUMMARY
Results-oriented Java Backend Developer with 3+ years of commercial experience, specializing in
the Fintech sector. Proven track record in designing and maintaining high-load, microservice-based
Payment Service Provider (PSP) infrastructures. Expert in building secure, scalable systems with a
deep understanding of data privacy, encryption, and financial regulations (PCI DSS certified).
TECHNICAL SKILLS
• Core: Java 11/17/21, OOP, SOLID, GRASP.
• Frameworks: Spring Boot , Spring Security/Web/MVC/Data, Hibernate, JPA, Servlet API.
• Databases : PostgreSQL, MySQL, MongoDB, H2, PGVector.
• Architecture & Integrations : Microservices, REST APIs, Kafka, RabbitMQ, AWS,
Google Cloud Services.
• Tools & DevOps: Git, GitHub/GitLab , Maven, Gradle , Docker , Linux, Swagger, Flyway,
Liquibase, Postman.
• Testing: JUnit, Mockito.
WORK EXPERIENCE
Java Software Developer | Asquad | Feb 2025 – May 2026
• Engineered and optimized secure payment modules for a complex Payment Service Provider
(PSP) infrastructure, ensuring 100% compliance with financial security standards.
• Successfully maintained and scaled microservices handling sensitive financial data
(PostgreSQL, MongoDB, Kafka, RabbitMQ), ensuring high availability and system
resilience.
• Streamlined internal team workflows and CI/CD collaboration, resulting in a 15% increase
in development velocity over a six-month period.
Java & Kotlin Developer | Change the World (Startup) | May 2023 – Feb 2025
• Built robust backend architecture for "Rate Me" and "Watch for Ukraine" Android
applications.
 • Integrated AWS for secure storage; utilized Kotlin/Java to ensure seamless communication
with Jetpack Compose UI.
• Developed monetized ad-revenue infrastructure to support volunteer funds.
Java Backend Developer | UWP Digital | Sep 2023 – Mar 2024
• Deployed robust Java applications to parse high volumes of open-source data.
• Trained and integrated a ChatGPT-4 model utilizing PGVector for advanced data processing.
• Architected a scalable, multilingual online support service using AWS and GCP.

EDUCATION
• Mate Academy: Java Software Developer Courses (2022)
• Odessa State Academy of Refrigeration: Master's Degree (2003)

LANGUAGES
• English: Upper-Intermediate
• Ukrainian: Native
• Russian: Native