QA Engineer (Manual, Web / Product Quality)

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: https://rubylabs.com/about-us/

We’re building and scaling a high-growth D2C product in the LegalTech / Utilities space and are looking for a QA Engineer who takes real ownership of product quality.

This is a hands-on, manual QA–first role in a fast-moving environment where features ship often, experiments run continuously, and quality cannot be an afterthought. You’ll work closely with Product and Engineering to ensure that what reaches users is stable, reliable, and works as expected across browsers, devices, and real-world scenarios.

We’re not looking for someone who only executes test cases. We’re looking for a quality owner — someone who thinks in user journeys, spots risks early, understands how systems break in production, and proactively raises issues before they impact customers.

This is not a checkbox or 9–5 role. The pace is high, expectations are clear, and your work will have direct impact on user experience, conversion, and trust in the product.

Core QA & Web Knowledge

• Strong understanding of modern web application architecture.

• Deep knowledge of browser behavior, including:

  • Cookies, sessions, localStorage

  • Cross-tab and cross-device session handling

• Solid understanding of authentication mechanisms, including:

  • Magic link / passwordless authentication

  • OAuth / SSO concepts (Google, Microsoft)

• Experience testing subscription-based products (billing flows, access control, edge cases).

• Good understanding of release cycles, regression testing, and risk-based QA.

• BrowserStack (or equivalent) — mandatory

  • Cross-browser and cross-OS testing

  • Mobile emulation and real-device testing

• Browser DevTools

  • Network inspection

  • Basic console error analysis

  • Cache and storage debugging

• Issue tracking tools (Jira, Plane, or similar)

• Basic familiarity with analytics and logging tools (Mixpanel, Sentry, or equivalents)

• Manual QA–first mindset with strong attention to detail and edge cases.

• Ability to think in real user scenarios, not just happy paths.

• Strong regression mindset — ability to identify areas that break repeatedly.

• Comfortable testing partially implemented or fast-changing features.

• Able to validate fixes independently, without relying on step-by-step instructions.

• Consistent focus on quality across environments and releases.

• Ability to read and understand API responses (REST / JSON).

• Familiarity with HTTP status codes and common error types.

• Awareness of common frontend and deployment-related issues, including:

  • Cache invalidation problems

  • Chunk loading failures

  • Environment mismatches after deploys

• Clear, structured written communication of bugs and findings.

• Ability to describe issues using:

  • Steps to reproduce

  • Expected vs actual behavior

• Proactive mindset — flags risks and potential issues early.

• Comfortable working directly with developers and product managers.

• Takes ownership of quality, not just test execution.

• Experience with D2C SaaS products.

• Exposure to A/B testing, feature flags, or experimentation frameworks.

• Understanding of automated testing concepts (not required to implement).

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: https://docs.google.com/document/d/1nkrN76JlZkbKj9WSOhlT1_mni_CZeDkHdwfIjPXVwvk/preview?tab=t.0#heading=h.ndsdl4wapxtt

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 (90 minutes)

• Final 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.

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