Iadviga Kosovtseva
Iadviga Kosovtseva

QA Engineer | QA Analyst | Software Tester

Open to offers · Member since 25 Aug 2026
Message
Location
Saint Petersburg, Russia
Desired salary
Unspecified
Work preference
Hybrid / Full Time
Experience level
Mid

About

Professional summary

I am a QA Engineer with nearly three years of hands-on experience testing enterprise telecom billing systems, microservices, and web and mobile applications. I specialize in manual functional, integration, regression, API, and UI testing.

I design test scenarios, test cases, checklists, and documentation, while performing exploratory testing, requirements analysis, defect investigation, and root cause analysis. I focus on identifying edge cases and ensuring that complex business logic is thoroughly validated.

I have strong technical experience with REST APIs, Postman, Swagger, SQL, PostgreSQL, JSON, YAML, RabbitMQ, Jira, Confluence, GitLab, Jenkins, Docker, Kubernetes, Selenium WebDriver, and Selenide. I use these skills to validate backend data, API integrations, and end-to-end business processes.

I currently work as a System Analyst, where I gather requirements, prepare functional and API specifications, analyze integrations, and collaborate with architects, developers, and QA teams. This role strengthens my understanding of system behavior and helps me create more effective test coverage.

I also have UX/UI design experience, which gives me an additional user-centered perspective when testing interfaces and workflows. I am open to remote, hybrid, and on-site opportunities, as well as relocation.

Skills

27 capabilities

Tech stack & tools

Working toolkit

Application Hosting

Application Utilities

Collaboration

Data Stores

Design

Languages & Frameworks

Experience

Career history

System Analyst Nexign

I gather and analyze requirements for telecom billing modules and system integrations. I prepare functional specifications and YAML API specifications for microservices, as well as technical and reference documentation for internal systems.

I collaborate with architects, developers, and QA engineers to make requirements clear, consistent, and testable. I analyze business logic, API interactions, and integration scenarios to identify edge cases, review analyst documentation, and support QA teams in understanding expected system behavior.

QA Engineer Nexign

I performed functional and integration testing of enterprise telecom billing and product management systems for telecommunications providers. I designed and maintained manual test scenarios and automation-ready test cases, validated REST APIs with Postman, and verified backend data using SQL and PostgreSQL.

I configured product offerings and business scenarios for end-to-end convergent billing testing, investigated production defects, performed root cause analysis, and verified fixes. I also supported releases, coordinated QA work during team lead absence, and collaborated with business analysts and solution architects to improve requirements and test coverage.

UX/UI Designer Altcraft

I designed interfaces for a corporate website and a Customer Data Platform. I created user flows, wireframes, UI layouts, responsive website versions, and high-impact product and training pages in Figma.

I collaborated with developers to ensure implementations matched design specifications. I also designed mass-operation workflows for the CDP platform, improving usability and streamlining user actions.

Software Tester AIS Gorod

I performed functional and UI testing of web applications and iOS mobile applications for housing and utilities management. I wrote and maintained test cases, use cases, and checklists, executed regression testing before releases, and logged defects for resolution with developers.

I developed and maintained frontend automated tests using Selenium WebDriver and Selenide. I improved test case readability, accelerated onboarding, optimized regression execution, and contributed to faster issue resolution through effective collaboration.

Education

Learning history

Saint Petersburg State Electrotechnical University "LETI"

Bachelor, Urban Environmental Safety; Engineering for Environmental Protection

Bachelor's degree in Urban Environmental Safety with a specialization in Engineering for Environmental Protection.

ProductStar

Professional Course, UX/UI Design

Studied UX principles, interface design, usability, design systems, Figma, wireframing, and user flows.

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