QA Backend Engineer

Fireup; Rybnik; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Hybrid work model (Rybnik)

Private medical care

MultiSport card

Language courses

Company breakfasts and lunches

Job summary

Fireup is seeking an experienced QA Engineer to design, implement, and oversee multi-level testing. You will build automated tests for APIs, test mobile apps on real devices, and run performance assessments across systems spanning several projects.

You will collaborate with product and development teams in a hybrid workspace, applying AI tools to improve efficiency while maintaining high quality and security standards. Strong English and international communication are essential.

Qualifications

• 5+ years of QA experience with test automation.
• Hands-on Java experience and RestAssured for API testing (Spring a plus).
• Programming or scripting in Python.
• Experience with Postman API testing.
• Experience testing mobile apps on devices and emulators (Android Studio).
• Experience preparing and running performance tests with JMeter and/or k6.
• Ability to analyze network communication using Charles Proxy.
• Experience with Git/GitHub, JIRA, Confluence.
• Strong English and ability to communicate in an international environment.
• Openness to using AI tools in everyday QA work.

Responsibilities

• Design, build, and maintain automated tests across API, mobile, and performance layers.
• Automate API tests and grow automated test coverage.
• Conduct manual API testing and test mobile apps on devices/emulators.
• Design and run performance tests with JMeter and/or k6.
• Analyze network traffic and report defects with Charles Proxy.
• Maintain stable test suites and identify flaky tests.
• Work with product and dev teams to define acceptance criteria and testability.
• Use AI tools to enhance testing while upholding quality and security.
• Share testing best practices with QA Engineers and Developers.

Skills

Test automation

Agile/Scrum

English proficiency

AI-assisted testing

International collaboration

Education

ISTQB or similar

Tools

Java

RestAssured

Python

Postman

Android Studio

JMeter

k6

Charles Proxy

Git/GitHub

JIRA

Confluence

SQL

Appium

Job description

Our projects are long-term partnerships with clients who stay with us for years. Why? Because we deliver solutions that genuinely solve their business problems. At fireup.pro, as a QA Engineer, you will design and test systems that have a real impact on how businesses operate, from complex logistics platforms to advanced industry-specific systems, including solutions for the healthcare sector. You will be responsible for designing, implementing, and overseeing testing processes at multiple levels: from automated API tests, through manual testing of mobile applications, to performance testing of systems that depend on multiple projects and technology stacks.

You will be responsible for:

• Designing, building, and maintaining automated tests using the development team’s stack (Java, Spring, RestAssured, Python)
• Automating API tests and developing a strategy to increase automated test coverage
• Performing manual API testing (Postman) and testing mobile applications on physical devices and emulators (Android Studio)
• Designing and running performance tests with JMeter and k6, including tests of dependent services from other projects
• Analyzing network traffic and request/response communication using Charles Proxy
• Analyzing and reporting defects and preparing detailed test reports
• Maintaining a stable and reliable test suite, analyzing failed tests, and identifying flaky tests
• Working with product and development teams to define acceptance criteria and ensure the testability of new features
• Using AI tools (e.g. Claude Code) to improve testing work while maintaining high standards of quality and security
• Sharing testing best practices with other QA Engineers and Developers
• 5+ years of experience as a QA Engineer, including experience in test automation
• Hands-on knowledge of Java and experience with RestAssured for API testing (knowledge of Spring is a strong advantage)
• Programming or scripting skills in Python
• Experience in API testing with Postman
• Experience testing mobile applications on physical devices and emulators (Android Studio)
• Experience preparing and running performance tests with JMeter and/or k6
• Ability to analyze network communication using Charles Proxy or similar tools
• Experience with version control systems (Git/GitHub) and tools such as JIRA and Confluence
• Good understanding of Agile/Scrum methodology
• Very good command of English and confidence communicating in an international environment
• Openness to using AI tools in everyday QA work

We will additionally appreciate:

• Experience integrating automated tests into CI/CD pipelines (e.g. GitHub Actions)
• Knowledge of security, privacy, or medical device regulations, such as HIPAA or GDPR
• Knowledge of SQL and experience with database data validation
• Experience with mobile test automation (e.g. Appium)
• Certifications such as ISTQB or similar

What we offer:

Employment based on your preferred form of cooperation (UoP/B2B).

Hybrid work model ( Rybnik) with flexible conditions – you decide whether you work remotely or from the office.

Modern equipment and support from an experienced team.

Skill development opportunities through training and language courses.

Attractive benefits: MultiSport card, private medical care (PZU), and many more.

Company breakfasts and lunches twice a week.

• Free parking.

Our recruitment process:

1. CV approval – contact with candidates via email
2. HR meeting – conducted via Google Meet (max. 45 minutes)
3. Technical interview – conducted via Google Meet (60–90 minutes)
4. Meeting with our CEO – final interview (approx. 30 minutes)