Middle QA Engineer

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Middle QA Engineer in Others

GR8 Tech
Full time
Email

Others
09/02/2026
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Warsaw, Poland

Responsibilities

Analyze requirements and product changes, identify risks and gaps, and define appropriate test coverage.
Design and execute functional, regression, integration, exploratory, and end-to-end tests across web, native mobile, backend, APIs, databases, and integrations.
Investigate and localize defects across client, backend, data, integrations, and environments using debugging, network, proxy, API, logging, and database tools.
Test web applications, native iOS and Android applications, REST APIs, backend functionality, authentication, authorization, and API communication.
Validate data with SQL queries and relational databases, and use tools such as Postman and Swagger for API testing.
Support software releases, contribute to release-readiness decisions, communicate quality risks and blockers, and collaborate with developers and stakeholders.
Adapt to new products and testing contexts while improving QA processes, documentation, and testing approaches.

Requirements

Solid hands-on experience in software testing or manual QA and the ability to work independently.
Strong experience testing web applications and native iOS and Android applications.
Strong hands-on experience with backend and REST API testing, including HTTP, client-server architecture, authentication, authorization, and API communication.
Confident use of API testing tools such as Postman, Swagger, or similar.
Understanding of relational databases and the ability to write SQL queries for data validation.
Strong debugging skills using browser DevTools, network analysis, and traffic interception tools such as Charles Proxy, Proxyman, or Fiddler.
Ability to investigate issues across UI, API, database, and integration layers.
Hands-on experience with Git workflows, including branches, merges, pull requests, tags/releases, and basic conflict resolution.
Experience supporting software releases and performing functional, regression, integration, exploratory, and end-to-end testing.
Ability to work with incomplete requirements, ask relevant questions, identify risks, and build sufficient test coverage.
Intermediate English or higher, with fluency in Ukrainian or Russian.
Preferred: experience with Kafka or similar message brokers, asynchronous and event-driven communication, microservices architecture, ADB/Logcat, Xcode Console, CI/CD pipelines, Docker, Kubernetes, cloud environments, test automation or scripting, performance or load testing, and high-load or product-based environments.

Benefits

Annual benefits cafeteria budget allocated among sports, medical, mental health, home office, and language benefits.
Paid maternity and paternity leave, monthly childcare allowance, 20+ vacation days, unlimited sick leave, and emergency time off.
Remote-first work arrangement with technical support and coworking compensation.
Online, offline, and offsite team events.
Internal courses and growth programs.

GR8 Tech

B2B provider. Platform for Champions. Delivering full-scale sportsbook & casino solutions worldwide. Our 2026 solution suite includes: • GREAT_CRYPTO TURNKEY — full-service sportsbook + casino platform + crypto payments • GREAT_TURNKEY — full-service sportsbook + casino platform • GREAT_SPORTSBOO...

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