Sr./Staff JavaScript Developer - Web SDK (Brazil/UK/Poland/India)
Core
Design, build, and optimize a high-performance Web SDK for device fingerprinting, identity verification, and behavior analytics to enable fraud detection and risk management.
Role type
Staff JavaScript Developer (Web SDK)
Builds
Web SDKs for device fingerprinting, identity verification, and behavior analytics
Domain
Fintech / AI Risk Decisioning / Fraud Prevention
Deliverable
production ML models | product features
Required skills
JavaScript (ES6+), TypeScript, Web SDK design, Browser APIs, Security principles (encryption, hashing, obfuscation), CI/CD pipelines, Build tools (Webpack, Babel, Rollup), REST APIs
Preferred skills
AI-driven analytics, risk systems, fraud prevention technologies, high-scale distributed environments
Technologies
JavaScript, TypeScript, Webpack, Babel, Rollup, Git
Responsibilities
Lead development and maintenance of high-performance Web SDK; Design and implement algorithms for device fingerprinting and behavior insights; Build and maintain CI/CD pipelines with automated cross-browser testing; Optimize SDK performance for minimal resource usage; Mentor junior engineers; Collaborate with cross-functional teams; Ensure data privacy and security principles in SDK design.
Seniority
Staff, hands-on IC with mentorship