Senior/Staff JavaScript Developer – Web SDK

About the role

Shape the future of trust in the age of AI at Oscilar. We're building the most advanced AI Risk Decisioning™ Platform used by banks, fintechs, and digital organizations to manage fraud, credit, and compliance risk. As a Senior/Staff JavaScript Developer you will design, build, and optimize our Web SDK for device fingerprinting, identity verification, and behavior analytics.

Key responsibilities

• Lead the design, development, and performance optimization of a high‑performance Web SDK that collects and analyzes browser and device data.
• Implement algorithms for unique device fingerprints and behavior‑based insights such as gestures, keyboard, and mouse interactions.
• Build and maintain a robust CI/CD pipeline with automated cross‑browser testing and release cycles.
• Ensure data privacy, security, and cross‑browser compatibility while continuously optimizing resource usage.

Required profile

• Bachelor’s degree in Computer Science, Software Engineering or related field, or equivalent experience.
• 8+ years of web development experience, including at least 3 years focused on building and maintaining SDKs.
• Proven track record of contributing to open‑source projects or showcasing relevant work on GitHub.

Required skills

• JavaScript (ES6+)
• TypeScript
• REST APIs
• Git and version‑control tools
• Browser APIs and cross‑browser compatibility
• Web SDK design and data‑collection libraries
• Security principles: encryption, hashing, obfuscation
• Build tools such as Webpack, Babel, Rollup
• CI/CD pipelines and automated testing

What we offer

• Competitive salary and equity packages, including 401k.
• Remote‑first culture – work from anywhere.
• 100% employer‑covered health, dental, and vision insurance (US).
• Unlimited PTO and family‑friendly environment.
• Professional development opportunities in an AI‑first company.