Олександр

Mgr. Oleksandr
Nesposudnyi
Bratislava, Slovak Republic • [відкрити контакти](див. вище в блоці «контактна інформація») • [відкрити контакти](див. вище в блоці «контактна інформація»)

WORK EXPERIENCE SKILLS

Software Developer / Java Backend Developer, Fiserv, s.r.o. - Java (Spring Boot)

Bratislava, Slovak Republic Node. JS

June 2026 - Currently Angular
Develop and maintain backend services using Java, Spring Boot React
and Quarkus TypeScript
Build and work with REST APIs and microservices
JavaScript
Develop and maintain Kafka-based integrations and messaging
Rest API
Work with PostgreSQL databases
PostgreSQL
Refactor and migrate services from Quarkus to Spring Boot
Implement new features and business requirements MySQL

Investigate and fix bugs and technical issues Unit testing (JUnit, Mockito)
Write and maintain unit and integration tests Docker
Use Docker, Git and Maven in daily development Amazon Web Services (AWS)
Participate in code reviews, refinement sessions and technical
discussions
L A N G UAG E S
Collaborate with developers and tech leads in an Agile/Scrum
environment Ukrainian - Proficiency (C2)

Russian - Proficiency (C2)
Java Full-Stack Developer (Spring Boot + Angular/React),
ITeam - Kiev, Ukraine Slovak - Advanced (C1)

December 2024 - March 2026 English - Upper intermediate (B2)

Delivered end-to-end application features across frontend and
backend layers using Angular, React, Java (Spring Boot), and
Node.js Driving lic ense
Designed and implemented REST APIs supporting frontend
modules and external integrations B
Developed reusable UI components using Angular and React with
TypeScript
Managed client-side state and application data flow across
complex views
Implemented backend business logic using Spring Boot and
Express.js aligned with product requirements
Integrated frontend applications with backend services ensuring
stable API contracts and error handling
Worked with relational databases (PostgreSQL, MySQL) including
schema updates and query optimization
Containerized application services using Docker for development
and deployment consistency

Deployed and supported services within AWS environments (EC2,
S3, RDS)
Contributed to CI/CD pipelines automating build, test, and
deployment workflows
Implemented integration tests validating API behavior and
frontend-backend interaction
Investigated and resolved production issues improving application
stability and performance
Refactored legacy modules improving maintainability and reducing
technical debt
Collaborated with designers, backend engineers, and QA within
Agile delivery cycles

Backend Developer (Java / Spring Boot), ProFIX - Kiev,
Ukraine
August 2022 - September 2024
Designed and implemented REST API endpoints supporting
production web application features used by internal and external
users
Developed backend business logic using Java and Spring Boot,
ensuring reliable integration with frontend modules and external
services
Managed relational database interactions (PostgreSQL/MySQL),
including schema updates and query optimization aligned with
evolving product requirements
Delivered backend components for end-to-end features
independently, from requirements clarification to production
deployment
Implemented integration tests using JUnit to validate backend logic
and API behavior
Containerized backend services using Docker for consistent local
development and deployment environments
Deployed and supported backend services using AWS infrastructure
(EC2, S3, RDS), assisting with environment configuration and
delivery pipelines
Worked with CI/CD pipelines to automate build, testing, and
deployment processes
Investigated and resolved production issues related to data
consistency and application logic, improving system reliability
Refactored legacy backend modules to reduce technical debt and
improve maintainability
Collaborated with cross-functional teams during sprint planning
and feature design discussions
Delivered backend tasks independently within Agile development
cycles

E D U C AT I O N

Faculty of Natural Sciences and Informatics, Constantine the

Philosopher University in Nitra
Applied Informatics
September 2019 - May 2025, Nitra, Slovak Republic
I studied applied computer science with a focus on software
development, database systems, computer networks, and
programming languages such as Java and Python. I acquired both
theoretical and practical knowledge in programming, data analysis,
information systems design and implementation, database
management, software engineering, and fundamentals of
cybersecurity. Additionally, I studied IT project management, agile
methodologies, and web application development, applying and
deepening my skills through multiple individual and team projects

Boyarka professional college of NULES of Ukraine
Department of Information Technologies
September 2015 - May 2019, Kiev, Ukraine
Studied information technologies with a focus on basic programming
and computer systems.