
Job Overview
Location
UK
Job Type
Full-time
Category
QA Engineer
Date Posted
February 27, 2026
Full Job Description
đź“‹ Description
- • Ruby Labs is a dynamic and innovative tech company dedicated to creating and operating cutting-edge consumer products across the health, education, and entertainment sectors. We are at the forefront of driving the future of consumer-led products, fostering a culture of innovation and continuous growth. Our mission is to empower individuals through technology, and we are seeking a highly skilled and motivated QA Engineer to join our talented team and play a pivotal role in ensuring the stability and reliability of our critical payment platform.
- • In this crucial role, you will be instrumental in maintaining the integrity of our payment systems amidst frequent releases and the occasional need for urgent hotfixes. We operate within a flexible Kanban and continuous delivery framework, which means you should be adept at navigating evolving priorities, defining test scopes with precision, building efficient and lightweight test coverage, and contributing to rapid deployment cycles without compromising the stability of our core payment functionalities.
- • Your primary focus will be on implementing robust risk-based testing strategies for all payment flows. This involves meticulously analyzing potential impacts on financial transactions and customer experience, and proactively identifying and communicating any residual risks. You will be responsible for end-to-end API validation, ensuring the seamless operation of REST APIs, asynchronous processes, and critical webhook integrations. A significant part of your role will involve developing and maintaining pragmatic regression and smoke checklists, striking an optimal balance between the need for speed in our delivery pipeline and the imperative of ensuring system safety and reliability.
- • Key responsibilities include performing comprehensive manual testing across Web UI and APIs to validate new features, bug fixes, and hotfixes. You will meticulously define test scopes based on the potential financial and customer impact of any changes, and clearly articulate any identified residual risks to stakeholders. A core aspect of your work will involve end-to-end API validation, including testing REST APIs, asynchronous flows, and webhooks, leveraging tools like Postman/Newman or equivalent.
- • You will also be responsible for data validation, ensuring the accuracy of state transitions and side effects within our PostgreSQL database. A deep understanding of concepts such as idempotency and retry mechanisms will be essential for this. You will own the maintenance and continuous improvement of our smoke and regression suites, with a particular emphasis on critical payment routes, ensuring they remain effective and up-to-date.
- • A vital part of our QA process is converting production incidents into actionable improvements. You will be tasked with transforming identified production issues into new regression test cases or enhanced monitoring checks, thereby strengthening our proactive defect prevention capabilities. Close collaboration with engineers and Product Managers is paramount; you will work hand-in-hand with them to clarify requirements, meticulously reproduce reported issues, and efficiently verify the effectiveness of implemented fixes.
- • Furthermore, you will be responsible for providing concise and informative QA notes for each release. These reports will encapsulate the scope of testing, the results obtained, any identified risks, and recommended follow-up actions, ensuring transparency and informed decision-making across the team. This role offers a unique opportunity to significantly impact the reliability and success of a high-volume payment platform within a fast-paced, innovative environment.
- • The ideal candidate will possess a strong foundation in manual testing principles, coupled with a practical understanding of payment processing concepts. Experience with API testing tools and basic database querying skills are essential. You should be comfortable working in a dynamic, agile environment that prioritizes continuous delivery and rapid iteration. Your ability to communicate effectively in English, both written and spoken, will be crucial for seamless remote collaboration.
- • We are looking for someone who is not just a tester, but a proactive quality advocate, deeply invested in the success of our products. You will be a key player in our mission to deliver exceptional consumer experiences by ensuring the utmost reliability and security of our payment infrastructure. This role is ideal for an ambitious individual eager to grow their expertise in a challenging and rewarding setting, contributing directly to the success of a leading tech company.
Skills & Technologies
About Ruby Labs Ltd.
Ruby Labs Ltd. is a London-based product studio that builds and scales consumer subscription mobile and web applications. The company focuses on health, wellness, and productivity verticals, developing apps such as Hint, Able, and the award-winning fitness platform FitCoach. Using data-driven growth and proprietary technology, Ruby Labs rapidly prototypes, launches, and iterates products to serve millions of global users. The team combines engineering, product design, and performance marketing expertise to create sustainable digital businesses. Founded in 2018, Ruby Labs operates a portfolio of self-funded apps, emphasizing user privacy, scientific validation, and long-term customer value.



