02/10/2026 updated
100 % available
Java Developer
Wrocław, Poland
Only remote
Java od Podstaw, Software Development AcademyAbout me
Java Developer. 3+ years in FinTech. Specialized in migrating legacy systems (Java 8) to Spring Boot Microservices. Proficient in RESTful API design, Spring Security, and Full-Stack integration with ReactJS.
Java (Programming Language)Spring SecurityApplication Programming Interfaces (APIs)ArchitectureAtlassian ConfluenceAtlassian JiraBuild AutomationBankingDevOpsDigitizationHibernateInfrastructure ManagementJava Persistence APIJUnitApache Maven
I. Professional Focus: FinTech Modernization (3+ Years)
My professional focus is Enterprise Application Modernization within the demanding FinTech sector. For 3+ years, I have been part of the Digital Transformation of a banking services at Commerzbank. This involved the critical overhaul of systems, migrating from outdated Java 8 infrastructure to modern, high-performance Java 17/21 environments.
II. Back-End, Security & ArchitectureJava & Spring: Expert in Java 17/21 and the full Spring Ecosystem: Spring Boot, Spring Security, and Spring Cloud.
APIs: Mastery of designing, implementing, and documenting performant and secure RESTful APIs using industry best practices and Swagger/OpenAPI.
Testing: Deep commitment to quality assurance utilizing JUnit and Mockito for comprehensive unit and integration testing.
III. Data & Full-Stack IntegrationPersistence: Strong command of JPA and Hibernate. Experienced with enterprise SQL Databases.
Front-End: Practical knowledge of ReactJS for seamless full-stack integration and building API consumption layers.
IV. DevOps & MethodologiesTools: Proficient with Docker for containerization, Apache Maven for build automation, and Git for version control.
Methodology: Strong proponent and practitioner of Scrum, using tools like JIRA and Confluence.
Languages
EnglishFluentPolishNative speaker
Project history
Migrated a legacy Java 8 application to Java 17/21, redesigning and rebuilding it with Spring Boot, Hibernate, and React. Collaborated with business experts to redefine requirements and design new system functionalities from scratch. Developed and documented RESTful APIs using Swagger. Delivered both frontend and backend components, maintained technical documentation, and worked in an Scrum environment with JIRA.