v
vladyslav_sp

Vladyslav S

@vladyslav_sp

Java Spring Boot Developer

Ukraine
Ukrainien, Russe, Anglais, Polonais
Certaines informations sont présentées en anglais.
À propos de moi
Java & Spring Boot developer focused on REST APIs, backend debugging, API testing, and full-stack integrations. I work with Java 17, Spring Security, JPA/Hibernate, MySQL, Flyway, Docker, Swagger/OpenAPI, JUnit, Postman, RestAssured, React, and TypeScript. I can build CRUD APIs, fix bugs, add endpoints, configure databases, write automated tests, connect frontends, and improve existing code. I provide tested solutions, clear communication, and setup instructions.... Plus d’infos

Compétences

v
vladyslav_sp
Vladyslav S
hors ligne • 

Voir mes services

API & Intégrations
I will build, fix, and improve your java spring boot rest API
De5 $US / projetPlus de détails
Test de logiciels
I will test your rest API with postman and automated java tests
De5 $US / projetPlus de détails

Portfolio

Expérience professionnelle

Self_Employed

Independent Software Developer

Self Employed • Freelance

Mar 2022 - Present • 4 yrs 4 mos

Develop and improve backend, frontend, mobile, and API testing projects. Work with Java 17, Spring Boot, Spring Security, Spring Data JPA, Hibernate, MySQL, Flyway, Docker, Maven, Swagger/OpenAPI, JUnit 5, Postman, RestAssured, React, TypeScript, Kotlin, Firebase, and GitHub Actions. Main responsibilities and achievements: • built REST APIs and CRUD functionality • implemented authentication and role-based authorization • designed relational database schemas and JPA relationships • added validation, exception handling, and database migrations • created Swagger/OpenAPI documentation • wrote unit, integration, and black-box API tests • configured Docker Compose and CI workflows • connected React and TypeScript frontends to backend APIs • debugged application startup, CORS, database, and API issues • reviewed, refactored, tested, and documented existing code Main portfolio project: Book Exchange, a full-stack Java and React platform with user profiles, a searchable catalog, ownership and lending workflows, an admin panel, 77 backend tests, and 30 independent API tests.