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Job DescriptionWorks on the development and evolution of the unified SDK's web components, ensuring the secure capture, validation, and transmission of data from different sources, such as images, documents, and sensors, while preserving its integrity throughout the entire journey to backend services.Responsible for implementing advanced protection mechanisms against digital fraud, including detection of content injection, session tampering, malicious automation, and execution in virtualized environments or untrusted browsers. Works directly on the client layer, considered one of the most critical surfaces exposed to attacks.Collaborates with Architecture, Information Security, Platform Engineering, and Product teams to transform security, reliability, and compliance requirements into scalable, production-ready solutions. Continuously works on performance optimization, cross-browser and cross-device compatibility, observability, and telemetry, contributing to increased confidence and accuracy in risk and fraud decision engines.Key ResponsibilitiesDevelop and maintain critical web components of the unified SDK using JavaScript and TypeScript.Design and implement protection mechanisms against digital attacks, automation, and manipulation of execution environments.Create solutions for detecting headless browsers, virtualized environments, emulators, and digital fraud tools.Ensure secure communication between web components, native SDKs, and backend services.Implement integrity and validation controls for data captured by the SDK.Develop telemetry, metrics, logs, and observability mechanisms for continuous platform monitoring.Perform performance analysis and optimize the capture experience across different browsers and devices.Participate in defining architecture, development standards, and security strategies for client-side applications.Conduct code reviews and provide technical support to development teams in adopting engineering best practices.Investigate vulnerabilities and contribute to the continuous evolution of fraud and abuse prevention mechanisms.QualificationsBachelor's degree in Computer Science, Software Engineering, Information Systems, or related field.Solid experience in developing web applications using JavaScript and TypeScript.Advanced knowledge of the architecture and internal workings of modern browsers.Experience with modern front-end frameworks such as React, Angular, or Vue.js.Knowledge of web application security, including OWASP Top 10, CSP, CORS, XSS, CSRF, and secure authentication.Experience with WebAuthn, device fingerprinting, and client-side protection mechanisms.Knowledge of detecting browser automation, virtualized environments, emulators, and scraping tools.Experience in integrating web applications with native mobile or desktop SDKs.Knowledge of REST APIs, secure communication protocols, and applied cryptography.Experience with observability, monitoring, and log analysis tools.Experience with agile development processes and DevSecOps practices.Preferred QualificationsExperience in digital identity, biometrics, or fraud prevention products.Knowledge of WebAssembly (WASM).Experience with behavioral analysis and device intelligence.Knowledge of anti-tampering, anti-debugging, and client code protection techniques.Experience in high-scale environments and applications with critical security requirements.Knowledge of document capture, liveness detection, or digital onboarding solutions.Experience with multi-platform SDK architecture.Behavioral CompetenciesStrong analytical skills and ability to solve complex problems.Mindset focused on security, quality, and reliability.Excellent communication skills for interacting with multidisciplinary teams.Ability to influence technical and architectural decisions.Sense of ownership and autonomy in driving strategic initiatives.Continuous interest in research and evolution in cybersecurity, anti-fraud, and emerging web technologies.Additional InformationSerasa Experian is much more than you imagine. With the purpose of creating a better future by expanding opportunities for people and businesses, in Brazil we are more than 4,000 people working in diverse teams and specialties. Here, every piece of knowledge and diversity complements each other, and you can work on what you love most. We are committed to building an inclusive culture and an environment where people can balance their careers with their personal commitments and interests, prioritizing well-being.We are dedicated to being one of the best and most innovative companies to work for in the country, enabling incredible experiences and careers for our people. Our strong people-first approach is recognized externally through various market certifications: we have been awarded by Great Place To Work™ in 24 countries and the international Top Employers certification, in addition to being recognized as one of the best companies for young professionals and having a 4.6 rating on Glassdoor. Each recognition indicates that we are on the right track, providing an increasingly better work environment for our talent.Experian Careers - Creating a better tomorrow togetherFind out what its like to work for Experian by clicking here
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