Sr./Staff JavaScript Developer - Web SDK

Accountabilities:

• • Lead the development, maintenance, and evolution of a high-performance Web SDK for collecting and analyzing browser and device data.
  • Design and implement algorithms for device fingerprinting and behavioral analysis, including gestures, keyboard activity, and mouse interactions.
  • Build and maintain robust CI/CD pipelines with automated cross-browser testing and reliable release processes.
  • Continuously optimize SDK performance, resource consumption, and reliability to deliver a seamless end-user experience.
  • Monitor emerging web technologies, browser capabilities, security practices, and industry trends to enhance SDK functionality.
  • Develop clean, maintainable, well-documented code aligned with strong engineering and coding standards.
  • Conduct thorough code reviews and mentor junior engineers through technical guidance and constructive feedback.
  • Collaborate with product managers, designers, QA engineers, and other stakeholders to deliver high-quality solutions aligned with customer requirements.
  • Embed data privacy and security principles throughout the SDK architecture and implementation.
  • Drive innovation in browser-based technologies supporting risk management, fraud detection, device intelligence, and behavioral analytics.

  Requirements:

  • Bachelor’s degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.
  • 8+ years of experience in web development, including at least 3 years focused on building and maintaining SDKs or similar libraries.
  • Advanced proficiency in JavaScript ES6+, TypeScript, REST APIs, Git, and modern version-control practices.
  • Extensive experience designing and maintaining Web SDKs or libraries focused on data collection, tracking, analytics, or similar use cases.
  • Deep understanding of browser environments, browser APIs, and efficient collection and processing of browser-related data.
  • Strong knowledge of data privacy, encryption, hashing, obfuscation, and related security principles.
  • Experience developing solutions that maintain compatibility across multiple browsers and devices.
  • Familiarity with server-side technologies and RESTful APIs for data retrieval and storage.
  • Proficiency with modern build tools such as Webpack, Babel, or Rollup.
  • Strong problem-solving abilities, attention to detail, and commitment to high-quality engineering.
  • Excellent communication and collaboration skills, with the ability to work effectively across technical and cross-functional teams.
  • Demonstrated ability to mentor engineers and provide constructive technical feedback.
  • Proven track record of contributing to open-source projects or showcasing relevant technical work through platforms such as GitHub.
  • Experience with AI-driven analytics, risk systems, or fraud prevention is an advantage.
  • Familiarity with JavaScript SDKs, gesture processing, and interaction data analysis is a plus.
  • Experience working in high-scale or distributed environments is preferred.

  Benefits:

  • Competitive compensation package with equity opportunities.
  • Remote-first culture with the flexibility to work from anywhere.
  • 401(k) program.
  • Comprehensive employer-paid health, dental, and vision insurance for employees and dependents in the US.
  • Unlimited paid time off.
  • AI-first technical environment with strong engineering and product representation across the organization.
  • Family-friendly workplace culture.
  • Regular team events and company offsites.
  • Extensive learning and professional development opportunities.
  • Opportunity to contribute to technology focused on making online transactions safer and strengthening digital risk protection.