Oscilar · 1 week ago
Sr./Staff JavaScript Developer - Web SDK
United States
Full-time
Remote
Senior Level, Lead/Staff
8+ years expOscilar is building an advanced AI Risk Decisioning™ Platform that helps organizations manage fraud, credit, and compliance risk. They are seeking a highly skilled Staff JavaScript Developer to design, build, and optimize their Web SDK, which will play a crucial role in device fingerprinting, identity verification, and behavior analytics.
Cyber SecurityOperating SystemsSecurity
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
Qualification
Required
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
Preferred
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
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
Company
Oscilar
The smartest way to make risk decisions.
51-200 employees
H1B Sponsorship
Oscilar has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (9)
2024 (3)
2023 (2)
2022 (1)
Funding
Current Stage
Growth StageTotal Funding
$20M2021-07-05Series A· $20M
Leadership Team
Neha Narkhede
Co-Founder & CEO
Recent News
MarketScreener
2025-12-12
2025-12-11
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