Manual QA Engineer

Who we are: We are a leader in fraud prevention and AML compliance. Our platform uses device intelligence, behavior biometrics, machine learning, and AI to stop fraud before it happens. Today, over 300 banks, retailers, and fintechs worldwide use Sardine to stop identity fraud, payment fraud, account takeovers, and social engineering scams. We have raised $145M from world‑class investors, including Andreessen Horowitz, Activant, Visa, Experian, FIS, and Google Ventures. Our culture: We have hubs in the Bay Area, NYC, Austin, and Toronto. However, we maintain a remote‑first work culture. #WorkFromAnywhere We hire talented, self‑motivated individuals with extreme ownership and high growth orientation. We value performance and not hours worked. We believe you shouldn't have to miss your family dinner, your kid's school play, friends get‑together, or doctor's appointments for the sake of adhering to an arbitrary work schedule. Location: Remote - Brazil São Paulo: São Paulo, Campinas, São José dos Campos Rio de Janeiro: Rio de Janeiro Minas Gerais: Belo Horizonte Paraná: Curitiba Santa Catarina: Florianópolis About this role: We are looking for a Manual QA Engineer who is passionate about delivering high‑quality, reliable software. You will be responsible for testing and validating device intelligence and security mechanisms across our mobile and web applications. You will apply your experience and knowledge to transform requirements into actionable test plans and detailed test cases. This work will also result in reports and metrics, allowing us to improve continuously. In addition, you will have ownership over the quality of significant deliverables and will collaborate with multiple engineers and teams to drive success. What you'll be doing: Create detailed, comprehensive, and well‑structured test plans, test cases, and reports on device trust, fraud detection, and secure user behavior. Perform manual testing across a variety of real devices, simulators/emulators, including rooted/jailbroken environments, VPN/proxy simulations, and mobile SDK integrations. Validate security and device intelligence features by working closely with multiple engineers and teams. Implement and maintain test cases inside Testmo or similar test management tools. Identify, record, and thoroughly document bugs. Use tools like Charles Proxy, ADB, Xcode, and Crashlytics to support exploratory testing, debugging, and log analysis. Promote a culture of quality throughout the organization as a quality champion. Track quality assurance metrics and continuously seek improvements. While the primary focus will be on manual testing, you will be expected to contribute to Mobile Automated testing over time using tools like Appium (WebdriverIO, NodeJS). What you'll bring: 4+ years of experience in manual testing, with a strong focus on mobile and web applications. Strong ability to review product requirements and design, and translate them into effective test plans and cases. Solid understanding of device intelligence, security testing, and threat vectors like jailbreak, VPN, emulator detection, and location spoofing. Familiarity with tools such as Burp Suite, Charles Proxy, ADB, and Xcode Instruments. Strong analytical and problem‑solving skills, with attention to detail and a security‑first mindset. Experience with CI/CD processes and agile environments. Exposure to mobile automation frameworks such as Appium (WebdriverIO, Node.js), or XCUITest — or a strong interest in learning them. Familiarity with JavaScript or TypeScript is a plus. Experience testing pure API products (headless) is a plus. Software development experience is a plus. Benefits we offer: Generous compensation in cash and equity. Early exercise for all options, including pre‑vested. Work from anywhere: Remote‑first Culture. Flexible paid time off, Year‑end break, Self‑care days off. Health insurance, dental, and vision coverage for employees and dependents – US and Canada specific. 4% matching in 401k / RRSP – US and Canada specific. MacBook Pro delivered to your door. One‑time stipend to set up a home office — desk, chair, screen, etc. Monthly meal stipend. Monthly social meet‑up stipend. Annual health and wellness stipend. Annual Learning stipend. Unlimited access to an expert financial advisory. Join a fast‑growing company with world‑class professionals from around the world. If you are seeking a meaningful career, you found the right place, and we would love to hear from you. To learn more about how we process your personal information and your rights in regards to your personal information as an applicant and Sardine employee, please visit our Applicant and Worker Privacy Notice. #J-18808-Ljbffr