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.
What you will do:
- 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
Qualifications and experience needed:
- 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)
Nice to have:
- Telecom domain experience: billing, charging, provisioning
- Docker, Kubernetes
- High-load systems experience
What we offer
- 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
Skills Required
- 4+ years of relevant experience as a backend-focused QA Engineer
- Strong backend testing experience across services, databases, and message brokers
- Automation experience with Java or TypeScript and CI pipeline integration
- Performance testing experience, including load profiles, latency, throughput, and error-rate analysis
- Requirements analysis and gap identification
- Experience creating test strategies and test plans
- Knowledge of test design techniques and testing methodologies
- SQL proficiency, including joins, aggregations, and data integrity checks
- Linux or UNIX command-line skills and basic Bash
- Practical Git skills, including branching, merging, and code review
- Experience with Mock Server or a similar dependency-isolation tool
- Knowledge of TCP, HTTP, client-server, and microservices architectures
- Experience with Postman, IntelliJ IDEA, Atlassian tools, GitLab, Jenkins, Kibana, and Grafana
- Higher technical education or equivalent relevant experience
- Ability to work in an Agile environment with development teams
- Strong analytical, communication, critical-thinking, and troubleshooting skills
- Intermediate or higher spoken and written English
- Telecom domain experience, including billing, charging, or provisioning
- Kafka or RabbitMQ experience
- Docker or Kubernetes experience
- Experience with high-load systems
What We Do
Kyivstar is Ukraine's largest electronic communications operator, providing a wide range of mobile and fixed-line services, including 4G, Big Data, cloud solutions, cybersecurity, and digital TV. Serving millions of subscribers, the company is a leader in the Ukrainian telecom market, committed to innovation and digital transformation while supporting society and the country through its extensive communication infrastructure and technological expertise.
