Javascript Engineer (IV-V)

📋 Description

• Co-own design, development, and maintenance of Confiant's client-side JS SDK.
• Optimize SDK internals for runtime performance and small footprint.
• Implement SDK versioning, deployment, and distribution strategies.
• Translate threat intel into SDK-level detection and blocking logic.
• Instrument the SDK for observability and reliable signals.
• Debug production issues across browsers and platforms.

🎯 Requirements

• Expert-level JavaScript (ES6+) with deep browser internals knowledge.
• Strong JS know-how in third-party/sandboxed envs (iframes, cross-origin).
• Proven experience building, shipping JS SDKs at production scale.
• Optimize for performance: bundle size, parse time, runtime efficiency.
• SDK distribution patterns: versioning, CDN, backward compatibility.
• Proficiency with modern JS tooling: Webpack, Rollup, esbuild; Babel/SWC; Jest.

🎁 Benefits

• Fully Remote
• Unlimited Paid Time Off
• Sabbatical
• Stock Option Plan
• Exceptional Health Care Plans (Medical, Dental & Vision)
• 401(k) Plan with Automatic Employer Contribution