Manual QA Engineer for CRM & Data Team

GR8_TECH; Warszawa; On-site; PLN 120,000 - 180,000; Full time

Benefits offered by this job

Paid maternity/paternity leave

20+ vacation days

Team events

Learning culture

Job summary

GR8_TECH builds B2B iGaming platforms and seeks a QA Engineer to ensure quality and reliability across Web apps, Backend layers, and REST APIs. You will independently identify risks, define test coverage, and localize root causes across client, database, and integration environments to support release decisions.

You’ll drive test coverage from requirements, design and execute tests, and validate data with SQL while communicating progress and risks clearly to the team.

Qualifications

• Solid hands-on experience in Software Testing / Manual QA and the ability to work independently.
• Strong experience testing Web applications.
• Strong hands-on experience with Backend and REST API testing.
• Good understanding of HTTP, client-server architecture, authentication, authorization, and API communication.
• Confident use of API testing tools such as Postman, Swagger, or similar.
• Good understanding of relational databases and ability to write SQL queries for data validation.
• Ability to investigate issues across UI, API, database, and integration layers.
• Hands-on experience with Git and common development/release workflows, including branches, merges, pull requests, tags/releases, and basic conflict resolution.
• Experience supporting software releases and understanding of functional, regression, integration, exploratory, and end-to-end testing.
• Ability to work with incomplete requirements, ask the right questions, identify risks, and build sufficient test coverage.
• Practical experience using AI tools in day-to-day QA work, such as Claude Code, ChatGPT, or similar tools, and willingness to incorporate AI into testing and problem-solving workflows.
• Intermediate English or higher, with fluency in Ukrainian or Russian.

Responsibilities

• Analyze requirements and product changes, identify gaps and risks, and define the right test coverage.
• Design and execute functional, regression, integration, exploratory, and end-to-end testing.
• Validate functionality across UI, API, database, and integration layers.
• Assess regression and release risks and make quality visible before changes go live.
• Investigate defects and localize issues across client, backend, data, integrations, and environments.
• Inspect HTTP/HTTPS requests and responses to troubleshoot issues.
• Verify bug fixes and make sure changes don’t introduce new problems.
• Test Web applications across relevant user flows, integrations, and edge cases.
• Test REST APIs and Backend functionality, including authentication, authorization, and API communication.
• Validate data using SQL queries and relational databases.
• Work with API tools such as Postman, Swagger, or similar.
• Releases & cross-team collaboration
• Support software releases and contribute to release readiness decisions.
• Communicate testing progress, blockers, risks, and quality clearly to the team.
• Work with developers and other stakeholders to investigate issues and unblock delivery.
• Contribute to improving QA processes, documentation, and testing approaches.
• Quickly understand new products, technical areas, and testing contexts.
• Bring a generalist QA mindset and apply the right testing approach rather than relying on one fixed process.
• Work independently while knowing when to ask questions, challenge assumptions, or raise a risk.

Skills

Manual QA

Web testing

Backend testing

REST API testing

Postman

Swagger

SQL queries

Git

CI/CD

Docker/Kubernetes

Tools

Postman

Swagger

Git

Docker

Kubernetes

Job description

GR8 _TECH builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.

If you’re a challenger in spirit and a champion in action — join us.

Why this role exists:

The purpose of this role is to ensure software quality and system reliability across Web applications, Backend layers, and REST APIs. The engineer independently identifies risks, defines test coverage, and localizes root causes across client, database, and integration environments to support release decisions.

What you’ll drive:

Analyze requirements and product changes, identify gaps and risks, and define the right test coverage.

Design and execute functional, regression, integration, exploratory, and end-to-end testing.

Validate functionality across UI, API, database, and integration layers.

Assess regression and release risks and make quality visible before changes go live.

Investigate defects and localize issues across client, backend, data, integrations, and environments.

Inspect HTTP/HTTPS requests and responses to troubleshoot issues.

Verify bug fixes and make sure changes don’t introduce new problems.

Test Web applications across relevant user flows, integrations, and edge cases.

Test REST APIs and Backend functionality, including authentication, authorization, and API communication.

Validate data using SQL queries and relational databases.

Work with API tools such as Postman, Swagger, or similar.

Releases & cross-team collaboration

Support software releases and contribute to release readiness decisions.

Communicate testing progress, blockers, risks, and quality clearly to the team.

Work with developers and other stakeholders to investigate issues and unblock delivery.

Contribute to improving QA processes, documentation, and testing approaches.

Quickly understand new products, technical areas, and testing contexts.

Bring a generalist QA mindset and apply the right testing approach rather than relying on one fixed process.

Work independently while knowing when to ask questions, challenge assumptions, or raise a risk.

What makes you a GR8 fit:

Must-have

Solid hands-on experience in Software Testing / Manual QA and the ability to work independently.

Strong experience testing Web applications.

Strong hands-on experience with Backend and REST API testing.

Good understanding of HTTP, client-server architecture, authentication, authorization, and API communication.

Confident use of API testing tools such as Postman, Swagger, or similar.

Good understanding of relational databases and ability to write SQL queries for data validation.

Ability to investigate issues across UI, API, database, and integration layers.

Hands-on experience with Git and common development/release workflows, including branches, merges, pull requests, tags/releases, and basic conflict resolution.

Experience supporting software releases and understanding of functional, regression, integration, exploratory, and end-to-end testing.

Ability to work with incomplete requirements, ask the right questions, identify risks, and build sufficient test coverage.

Practical experience using AI tools in day-to-day QA work, such as Claude Code, ChatGPT, or similar tools, and willingness to incorporate AI into testing and problem-solving workflows.

Intermediate English or higher, with fluency in Ukrainian or Russian.

Nice-to-have

Practical experience with Kafka or similar message brokers and the ability to read and analyze messages/events.

Understanding of asynchronous and event-driven communication and microservices architecture.

Familiarity with CI/CD pipelines, Docker, Kubernetes, or cloud environments.

Basic experience with test automation or scripting, and/or performance or load testing.

Experience working with high-load or product-based environments.

Why you’ll love working here:

Benefits Cafeteria — annual budget you allocate to:

Work-life & support

• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Team events (online/offline/offsite).
• Learning culture with internal courses + growth programs.

Our culture & core values:

GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.

FUELLED BY TRUST: we’re open, honest, and have each other’s backs.

OWN YOUR GAME: we take initiative and own what we do.

ACCELER8: we move fast, focus smart, and keep it simple.

CHALLENGE ACCEPTED: we grow through challenges and stay curious.

BULLETPROOF: we’re resilient, ready, and always have a plan.