We are looking for a General QA Engineer
About us Kyivstar.Tech is a Ukrainian hybrid IT company and a resident of Diia.City.
We are a subsidiary of Kyivstar, one of Ukraine’s largest telecom operators.
Our mission is to change lives in Ukraine and around the world by creating technological solutions and products that unleash the potential of businesses and meet users’ needs.
Over 700+ KS.Tech specialists work daily in various areas: mobile and web solutions, as well as design, development, support, and technical maintenance of high-performance systems and services.
We believe in innovations that truly bring quality changes and constantly challenge conventional approaches and solutions.
Each of us is an adherent of entrepreneurial culture, which allows us never to stop, to evolve, and to create something new.
Work in a cross-functional team with product managers, analysts and developers on a high-load telecom platform
Review requirements and use cases early, and flag gaps, ambiguities, and edge cases before development starts
Own test planning for features: planning, test design, execution, follow-up, and reporting
Test APIs and integrations across microservices, verifying the full data flow
Plan and run performance and load tests using JMeter, and analyze results
Develop automated tests across layers (component, integration, E2E) using Java 21, JUnit 5, REST Assured, Testcontainers, WireMock, and Allure
Maintain and stabilize existing test suites in CI
Run regression testing and triage failures
Maintain test documentation in Jira, Zephyr, and Confluence
4+ years of relevant working experience as a QA Engineer with a backend focus
Strong backend testing experience: verifying end-to-end data flow between services, databases and message brokers, not only HTTP responses
Solid Java test automation skills and experience integrating tests into CI pipelines
Practical Kafka experience: producing and consuming test messages, verifying async processing, and understanding consumer groups
Performance testing experience: designing load profiles, running tests, and interpreting latency, throughput, and error rate
Excellent requirements analysis skills — identifying gaps and ambiguities before development starts
Strong test design skills and experience writing test strategies and test plans
SQL knowledge: complex queries with joins and aggregations, data integrity checks
Linux/UNIX command line: log analysis, basic bash
Practical skills with Git: branching, merging, code review
Experience isolating dependencies with WireMock, MockServer, or similar tools
Knowledge of TCP, HTTP
Understanding of client-server and microservices architectures: inter-service communication, failure points, idempotency
Good knowledge of Postman, IntelliJ IDEA, Atlassian stack (Jira, Confluence, Zephyr), GitLab, Kibana, Grafana
Higher technical education or equivalent relevant experience
Ability to work in a fast-paced Agile environment in close collaboration with the development team
Strong analytical and troubleshooting skills, a critical mindset, and clear communication
English at Intermediate level or higher (written and spoken)
Telecom domain experience: billing, charging, provisioning
Docker, Kubernetes
High-load systems experience
Office or remote – it’s up to you
Remote onboarding
Performance bonuses for everyone (annual or quarterly — depends on the role)
We train employees: with the opportunity to learn through the company’s library, internal resources, and programs from partners
Health and life insurance
Wellbeing program and corporate psychologist
Reimbursement of expenses for Kyivstar mobile communication
