Senior JavaScript Developer

Description

• 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.

Requirements

• 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 • Proficiency: JavaScript (ES6+), TypeScript, REST APIs, Git, and version control tools • Extensive experience designing and maintaining Web SDKs or libraries with a focus on data collection, tracking, or analytics • Deep understanding of browser environments, APIs, and efficient handling of browser-related data • Strong knowledge of data privacy, encryption, hashing, and obfuscation techniques • Experience in building solutions that work seamlessly across various browsers and devices • Understanding of server-side technologies and RESTful APIs for data retrieval and storage • Proficiency in modern build tools and frameworks like Webpack, Babel, or Rollup

Benefits

• Competitive salary and equity packages, including a 401k • Remote-first culture — work from anywhere • 100% Employer covered comprehensive health, dental, and vision insurance with a top tier plan for you and your dependents (US) • Unlimited PTO policy • AI First company; both Co-Founders are engineers at heart; and over 50% of the company is Engineering and Product • Family-Friendly environment; Regular team events and offsites • Unparalleled learning and professional development opportunities • Making the internet safer by protecting online transactions

Copyright © ReadingWaters 2026.