Natalija Kotuseva, Developer in Vilnius, Vilnius County, Lithuania
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Natalija Kotuseva

Verified Expert  in Engineering

Manual QA Engineer and Developer

Vilnius, Vilnius County, Lithuania
Toptal Member Since
October 18, 2022

Natalija is a software tester experienced in manual testing, mainly working on eCommerce and telecommunications projects. She was the leading QA specialist in a mobility transformation project involving customer data migration from legacy systems for a major telco provider in Europe. Natalija's expertise includes API automation testing, having completed several projects for an international energy holding company.


Baltic Amadeus
Sylius, SQL, Android, iOS, Jira, Postman, Confluence, Microsoft Office...
SQL, Microsoft Office
Microsoft Office




Preferred Environment

Slack, Teams, Jira, SAP CRM, SAP Hybris, Postman, Confluence, BrowserStack, Manual Testing

The most amazing...

...project I've worked on is migrating customer contracts from legacy systems to a new unified solution, resulting in a 99% success rate.

Work Experience

QA Engineer

2019 - PRESENT
Baltic Amadeus
  • Designed automated application programming interface (API) tests for a self-service web application API.
  • Tested customers and services migration from legacy systems to a new unified solution.
  • Created and managed bug reports, test cases, and plans in Jira.
  • Executed test cases and prepared project overviews for stakeholders.
  • Prepared and maintained software and testing documentation.
  • Consulted clients about project testing flow and process.
  • Trained and supervised new joiners and created a training plan for easier onboarding.
Technologies: Sylius, SQL, Android, iOS, Jira, Postman, Confluence, Microsoft Office, JavaScript, SAP CRM, SAP Hybris, BrowserStack, Snagit, Skype, Slack, Teams, Figma, Graylog, QA Testing, Manual Testing, Manual Software Testing, Quality Assurance (QA), Manual QA

Estate Management Analyst

2017 - 2019
  • Ensured the IT asset management compliance with the bank's standards.
  • Produced regular reports based on stakeholder requirements.
  • Tested the upgrade of the IT service management system by manual testing.
  • Remediated unsupported infrastructure and applications.
Technologies: SQL, Microsoft Office

Resource Scheduler | Reporting Analyst

2013 - 2017
  • Maintained and improved the staff scheduling, which helped manage the operational performance of the IT support center.
  • Prepared training materials and knowledge documents for new joiners and stakeholders to improve the onboarding experience.
  • Analyzed data and provided reports based on stakeholder and service requirements.
  • Created a training plan for easier new joiner integration with the team.
Technologies: Microsoft Office

Core Migration Project

The project is related to migrating customer contracts, services, and invoices from legacy systems to a new unified solution for Lithuania's largest telecommunications services provider. I was the lead tester on this project, in charge of the overall test process from test preparation to execution and production results verification.

My tasks included distributing the team workload, supporting business testers with user acceptance testing (UAT) activities, and preparing and organizing integration testing with other teams. I also presented the project demo to stakeholders and supported testers and developers with various matters about the project.

API Tests Automation

I created REST API test suits for customer and utility provider management for this project. My responsibilities also covered preparing automated API tests running in Postman for back-end developers and validating responses according to the JSON Schema and the provided API documentation.

eCommerce Web Application

I managed the overall application, stock, and administration system testing, including login and registration, checkout, payment, email receipts, and discount functionality. Furthermore, I prepared test cases, bug reports, testing documentation, and functionality demo for the client.

Self-service App

Android and iOS application for a telecom enterprise. I was in charge of the application improvements testing, including services overview window, invoices review and payments, and subscribers and services management. Also, I created and managed test cases and bug reports.


Snagit, BrowserStack, Postman, Jira, Confluence, Figma, Graylog, Google Analytics, Slack, Skype, SAP Hybris, SAP S/4HANA


Manual Testing


Android, iOS


Swagger, Sylius


JavaScript, SQL




Microsoft Office, QA Testing, Manual Software Testing, Quality Assurance (QA), Manual QA, SAP CRM, Teams

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