Senior JavaScript Developer – Web SDK
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Job Description
Staff JavaScript Developer designing and building a Web SDK to enhance fraud detection for AI Risk Decisioning at Oscilar. Collaborating across teams to deliver innovative solutions.
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.
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
- 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.
Benefits:
- 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
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