QA Engineer

Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at:

We are looking for a Middle QA Engineer who is detail-oriented, proactive, and confident working in a fast-moving environment without strict sprint cycles. You'll work closely with developers and product engineers to ensure that our platform remains stable and reliable during frequent releases and urgent hotfixes.

You'll focus on risk-based testing for payment flows, API validation, and maintaining lightweight QA coverage that balances speed with safety.

• Manual Testing: Execute test cases for new features, regression, and hotfix validation across web and API layers.
• Risk-based Testing: Prioritize test coverage based on business and financial impact.
• API Testing: Perform end-to-end validation using Postman/Newman or similar tools.
• Test Documentation: Maintain clear checklists and regression sets for critical payment routes.
• Incident Feedback: Transform production incidents into new regression cases or automated checks.
• Automation Support: Contribute to automated test coverage (pytest, Playwright or similar frameworks).
• Collaboration: Work closely with developers and product owners to define test scope and validate fixes.
• Reporting: Provide concise QA summaries per release (status, scope, risks).

• 3+ years of experience in software testing (preferably in fintech, payments, or backend-heavy systems).
• Deep understanding of API testing, regression, and smoke strategies.
• Practical knowledge of payment concepts: Auth, Capture, Refund, 3DS, retries, webhooks, idempotency.
• Strong experience with REST API tools (Postman, Newman, or cURL).
• Basic SQL skills (PostgreSQL) and ability to analyze backend data.
• Comfortable working in Kanban or non-sprint environments.
• Experience with monitoring/logging tools (Grafana, Kibana, or Sentry).
• Strong attention to detail and ownership mindset.
• Good verbal and written English skills; ability to work in a remote, async team.

• Experience with PSPs (Stripe, PayPal, Adyen, Braintree, Worldpay, etc.).
• Familiarity with test automation (pytest, Playwright).
• Understanding of network tokenization (DPAN/NT) and 3DS flows.
• Prior work in fully remote, continuous deployment environments.

Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately ± 4 hours of CET. This ensures optimal collaboration and communication during working hours.

Discover the perks of being part of our vibrant team We offer:

• Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
• Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
• Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
• Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
• Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here:

Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth

After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:

• Recruiter Screening (40 minutes)
• Technical Interview (60 minutes)

At Ruby Labs, we move fast, aim high, and expect the same from our team. We're not here to play small—we're here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.

This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you're hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.

Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more—more responsibility, more growth, and more success.