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Roman Makitrenko is the Head of QA at Wirex, a British fintech company that works on combining traditional and digital currencies in one app. He explains how to find a balance between losses due to mistakes and fast delivery of functionality. A bug in a product can be costly for a company, not only financially, but also in terms of reputation. QA specialists need to consider security, data protection, performance and UX issues when testing a product. It's important to remember if the parts of functionality don't work or have serious issues, a company could lose profit on operations.