Катерина

Kateryna Volianiuk
[відкрити контакти](див. вище в блоці «контактна інформація»)
[відкрити контакти](див. вище в блоці «контактна інформація»)
https://github.com/kiborgozavr

SOFTWARE ENGINEER
SUMMARY
Software Developer with commercial experience in backend development, software testing, and
problem investigation. Currently expanding my expertise in C++ and interested in low-level programming.
Strong analytical and experimental background gained through a PhD in Chemistry and laboratory research.
Experienced in designing experiments, analyzing complex data, troubleshooting technical issues, and
collaborating with cross-functional teams. Motivated to apply programming and analytical skills in integrated
circuit testing and validation.

SKILLS
1. Programming Languages/Technologies: C++ (basic), Java, TypeScript, JavaScript, SQL, HTML, CSS
2. Software Development: Spring Boot, Spring Data JPA, Hibernate, Express.js, REST APIs,
Microservices Architecture, Object-Oriented Programming, Software Design Documentation (SDD)
3. Databases: PostgreSQL, MongoDB
4. Tools & Technologies: Git, Docker, Liquibase, Elasticsearch, Postman, Swagger/OpenAPI, GitHub
Copilot, IntelliJ IDEA, WebStorm
5. Monitoring & Observability: Prometheus, Thanos
6. Testing: JUnit, Mockito, Unit Testing, Integration Testing, API Testing, Smoke Testing, Regression
Testing, Defect Investigation
7. Operating Systems: Linux, Windows

WORK EXPERIENCE
Backend Developer (TypeScript / Express.js)
DotCode | May – June 2026
• Developed and maintained backend functionality for a financial platform focused on lending and
savings products.
• Implemented integrations with external KYC, user verification, and government services through REST
APIs.
• Developed backend features using TypeScript, Express.js, and MongoDB.
• Prepared Software Design Documents (SDD) and technical documentation for new features and
integrations.
• Participated in solution design, API integration, testing, and production support.
Collaborated with QA and business teams during feature validation and troubleshooting.

Manual QA Engineer (Project Assignment)
DotCode | Apr – May 2026
• Performed smoke, regression, and functional testing during a temporary project assignment.
• Created test scenarios and documented expected application behavior.
• Verified application behavior against functional requirements.
• Investigated failures and documented defects.
• Reported defects and participated in bug investigation and root-cause analysis.
• Collaborated with development teams to validate fixes and improve product quality.

Java Developer
DotCode | Jan – Apr 2026
• Developed and maintained backend services for financial and banking applications.
• Worked on a large international web platform based on microservice architecture using Java, Spring
Boot, and PostgreSQL.
• Implemented business functionality and supported existing services in a distributed environment.
 • Developed and maintained database migrations using Liquibase.
• Investigated incidents and application issues using Elasticsearch log analysis and request monitoring.
• Worked with monitoring tools including Prometheus and Thanos.
• Participated in troubleshooting and root-cause analysis of production and testing environment issues.
• Wrote unit tests and participated in integration testing activities.
• Used Git-based development workflows and collaborated with developers, QA engineers, and business
stakeholders.
• Worked with API documentation and testing tools including Postman and Swagger.
• Used AI-assisted development tools to improve code quality and perform security-oriented code reviews
according to customer requirements.

Java Backend Developer
Team Challenge, Ukraine | Sept 2025 – Jan 2026
• Developed a full-featured e-commerce web application using Java, Spring Boot, Hibernate, and
PostgreSQL.
• Implemented RESTful APIs and complete CRUD functionality for users, products, and orders.
• Developed user authentication and authorization functionality.
• Containerized the application using Docker.
• Managed database schema evolution using Liquibase.

Junior Research Scientist
Lviv Polytechnic National University, Ukraine | 2018 – 2023
• Designed and conducted independent scientific experiments, from planning and execution to analysis
and interpretation of results.
• Selected and applied analytical methods for chemical structure determination and validation of research
findings.
• Worked with laboratory equipment during experimental research.
• Solved complex research problems in highly ambiguous environments by defining approaches, testing
hypotheses, and evaluating outcomes.
• Developed strong analytical thinking, information research, and root-cause investigation skills through
independent scientific work and international collaboration.
• Published 11 scientific papers and 37 abstracts.

Online Chemistry Tutor
Self-employed | 2016 – Jan 2026
• Delivered personalized chemistry lessons to school and university students.
• Developed strong communication, mentoring, and problem-solving skills.
• Adapted learning materials and teaching approaches to different student needs.

EDUCATION
PhD in Chemistry – Lviv Polytechnic National University, Ukraine. 2018 – 2024

COURSES & CERTIFICATIONS

JetBrains Academy:
• Introduction to C++

SoftServe Academy:
• Java Fundamentals
• Practical Java
• Database Fundamentals
• DevOps for Developers
• Frontend Fundamentals
Completed as part of the Java Backend Developer learning track (2024–2025).
 CURRENT LEARNING
• Modern C++
• STL
• Google Test
• CMake

LANGUAGES
• Ukrainian – Native
• Russian – Native
• English – B1+ (Working Proficiency)