Данило

Danylo Senchyshyn
Full-Stack Developer · Java / Spring Boot · React / TypeScript · PostgreSQL

SUMMARY

Full-stack developer with over a year of commercial experience building web applications end-to-end. On
the backend I work with Java, Spring Boot, and PostgreSQL — REST APIs, databases, caching, and
message queues. On the frontend I build interfaces with React and TypeScript. I'm comfortable owning
features from database schema to UI.

WORK EXPERIENCE

Full-Stack Developer — Softica Jan 2025 – Present · Remote

• Built REST APIs and backend business logic with Java 17 and Spring Boot. Set up authentication
with Spring Security and database access with Spring Data JPA.
• Worked with PostgreSQL — designed data models and optimized slow queries, reducing response
time on critical endpoints by up to 60%.
• Set up Redis caching from scratch — cut the number of database calls on hot endpoints by ~40%,
which noticeably improved response times under load.
• Connected backend services through async message queues using Kafka and RabbitMQ — so
services don't depend on each other and the system stays stable under load.
• Built user interfaces with React and TypeScript — component architecture, state management,
API integration, and responsive layouts with TailwindCSS.
• Covered backend code with tests using JUnit and Mockito, reaching ~70% test coverage on core
modules. Took part in code reviews and helped fix production issues.

TECH STACK

Backend Java 17, Spring Boot, Spring MVC, Spring Security, Spring Data JPA
APIs & Messaging REST API, Microservices, Kafka, RabbitMQ
Frontend TypeScript, React, JavaScript, TailwindCSS
Databases PostgreSQL, MongoDB, Redis
Testing & QA JUnit, Mockito, Postman
DevOps & Tools Docker, Git, Maven, GitLab CI/CD

EDUCATION

Technical University of Košice (TUKE)
Bachelor's degree in Computer Science · 2023 – 2026