oscilar - Sr./Staff JavaScript Developer - Web SDK (Brazil)
Requirements
• Proficiency: JavaScript (ES6+), TypeScript, REST APIs, Git, and version control tools. • Web SDK Expertise: Extensive experience designing and maintaining Web SDKs or libraries with a focus on data collection, tracking, or analytics. • Browser APIs: Deep understanding of browser environments, APIs, and efficient handling of browser-related data. • Security Principles: Strong knowledge of data privacy, encryption, hashing, and obfuscation techniques. • Cross-browser Compatibility: Experience in building solutions that work seamlessly across various browsers and devices. • Server-side Familiarity: Understanding of server-side technologies and RESTful APIs for data retrieval and storage. • Build Tools: Proficiency in modern build tools and frameworks like Webpack, Babel, or Rollup. • Excellent problem-solving abilities, with attention to detail and a focus on delivering high-quality solutions. • Strong communication and collaboration skills to work effectively in cross-functional teams. • Ability to mentor and provide constructive feedback to junior developers. • Bachelor’s degree in computer science, Software Engineering, or a related field (or equivalent experience). • 8+ years of experience in web development, with at least 3 years focused on building and maintaining SDKs. • Proven track record of contributing to open-source projects or showcasing relevant work on platforms like GitHub. • Experience with AI-driven analytics, risk systems, or fraud prevention technologies. • Familiarity with JavaScript SDKs, gestures, and interaction data processing. • Prior experience in a high-scale, distributed environment.
Responsibilities
• Lead the development and maintenance of a high-performance Web SDK for collecting and analyzing browser and device-related data. • Design and implement algorithms to create unique device fingerprints and capture behavior-based insights (e.g., gestures, keyboard, and mouse interactions). • Build and maintain a robust CI/CD pipeline with automated cross-browser testing and release cycles. • Continuously optimize SDK performance to minimize resource usage and ensure a seamless user experience. • Stay updated on emerging web technologies, security practices, and industry trends to enhance SDK capabilities. • Develop clean, maintainable, and well-documented code aligned with the best coding practices. • Conduct thorough code reviews and mentor junior engineers on best practices. • Collaborate with cross-functional teams—including product managers, designers, and QA engineers—to meet high-quality standards and customer requirements. • Ensure data privacy and security principles are embedded in the SDK’s design and implementation. • Drive innovation in browser-based solutions for risk, fraud detection, and device analytics.
Benefits
• Mission-driven teams: Work alongside industry veterans from Meta, Uber, Citi, and Confluent, all united by a shared goal to make the digital world safer. • Ownership and impact: We believe in extreme ownership. You'll be empowered to take responsibility, move fast, and make decisions that drive our mission forward. • Innovate at the cutting edge: Your work will shape how modern finance detects fraud and manages risk. • Compensation: Competitive salary and equity packages, including a 401k • Flexibility: Remote-first culture — work from anywhere • Health: 100% Employer covered comprehensive health, dental, and vision insurance with a top tier plan for you and your dependents (US) • Balance: Unlimited PTO policy • Technical: AI First company; both Co-Founders are engineers at heart; and over 50% of the company is Engineering and Product • Culture: Family-Friendly environment; Regular team events and offsites • Development: Unparalleled learning and professional development opportunities • Impact: Making the internet safer by protecting online transactions • If you are passionate about creating impactful web SDKs and enjoy solving complex challenges in risk and fraud prevention, we’d love to hear from you.
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