Mirrai Careers

Web/App Test Engineer

Binance

Hong Kong Remote Posted 30+ days ago
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Binance is a leading global blockchain ecosystem behind the world’s largest cryptocurrency exchange by trading volume and registered users. We are trusted by 300+ million people in 100+ countries for our industry-leading security, user fund transparency, trading engine speed, deep liquidity, and an unmatched portfolio of digital-asset products. Binance offerings range from trading and finance to education, research, payments, institutional services, Web3 features, and more. We leverage the power of digital assets and blockchain to build an inclusive financial ecosystem to advance the freedom of money and improve financial access for people around the world. Role Overview Responsible for end-to-end quality assurance across Web and App (mobile) surfaces — combining automated and exploratory testing to ensure product stability, compatibility, and interaction experience from the user's perspective. The core requirement is cross-platform testing capability (Web + App), with the ability to design and maintain an automated testing system and to think deeply about troubleshooting and user-experience-oriented quality. In one sentence: This role is the quality gatekeeper for Web/App products — someone who can write automation scripts, test interaction experiences, investigate data issues, and use engineering methods to replace manual testing with systematic automated quality coverage. Not a manual tester — a QA engineer with real coding ability. KEY RESPONSIBILITIES * Design and maintain comprehensive Web/App test cases and test plans covering functionality, compatibility, and interaction * Develop and maintain UI/API automated tests using Java, Python, or JavaScript to ensure high coverage and reliability * Combine automation and manual exploratory testing to validate user scenarios and discover potential experience issues * Perform root cause analysis on test failures and production issues, and drive fixes to closure * Identify blind spots in test coverage and continuously improve automation effectiveness * Participate in testing for new features — define expected behaviors, system impact, and risk points from a user-experience perspective * Conduct App compatibility testing across devices, OS versions, and screen sizes, as well as Web cross-browser and cross-resolution testing * Participate in performance testing (page load time, App cold start / warm start, etc.) and ensure stability under high-concurrency and weak-network scenarios REQUIREMENTS * Strong coding ability in at least one of Java, Python, or JavaScript (live coding assessment required) * Extensive Web/App automation testing experience with tools such as Selenium, Appium, Playwright, etc. * Solid understanding of Web/App testing methodologies and automation framework design * Proficiency in SQL for data validation and issue troubleshooting * Proven root cause analysis ability to solve complex quality problems * Familiarity with Web front-end technologies (HTML/CSS/JS) and mobile platform fundamentals (Android/iOS architecture and characteristics) * Experience building testing tools, platforms, or quality infrastructure IDEAL CANDIDATE PROFILE Background: 1–5 years of QA or test development experience, including at least 1 year of Web or App automation testing Strong coding skills — able to write code from scratch, not just scripts Proficient in SQL for independent data validation and troubleshooting Hands-on mobile or Web testing experience Core Competencies: Automation capability: Can design and develop automation frameworks, not just use existing tools Root cause analysis: Can trace test failures or production issues back to their root cause SQL & data validation: Can write complex SQL to verify data consistency and troubleshoot data-related bugs Cross-platform understanding: Understands Web/App architecture, including front-end/back-end interaction, network requests, cache mechanisms, and WebView UX sensitivity: Can identify experience issues from the user's perspective, not just whether functionality works Test tooling: Experience building test platforms, tools, or quality infrastructure Collaboration drive: Can push developers to fix issues rather than passively waiting Soft Skills: Rigorous and detail-oriented "Destructive thinking" mindset — adept at finding system weaknesses Strong communication — bridges developers and product managers Quality ownership mentality — treats quality as personal responsibility BONUS POINTS * Payment, transaction, or financial system QA experience * AI tooling usage experience * Crypto / Web3 industry background * Hands-on App compatibility testing experience using cloud device platforms such as Testin or WeTest * Weak-network testing experience using tools such as Charles or Fiddler Why Binance • Shape the future with the world’s leading blockchain ecosystem • Collaborate with world-class talent in a user-centric global organization with a flat structure • Tackle unique, fast-paced projects with autonomy in an innovative environment • Thrive in a results-driven workplace with opportunities for career growth and continuous learning • Competitive salary and company benefits • Work-from-home arrangement (the arrangement may vary depending on the work nature of the business team) Binance is committed to being an equal opportunity employer. We believe that having a diverse workforce is fundamental to our success. By submitting a job application, you confirm that you have read and agree to our Candidate Privacy Notice.

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