TypeScript Engineer, JS Agent

21 days ago

Remote, WorldwideMid Level / Senior

Base Salary

$130k - $180k/yr

Responsibilities

Build and maintain the browser-side TypeScript/JavaScript agent for device identification and bot detection.
Engineer for stealth, resilience, and performance-minimizing footprint.
Stay ahead of browser changes and fingerprinting techniques.
Collaborate with backend, security, and data science teams.
Write comprehensive tests and contribute to CI pipelines.
Contribute to a widely-used open-source project with significant usage.
Use native browser JavaScript APIs without third-party libraries.
Push TypeScript and other tools to their limits.

3-5 years of JavaScript and TypeScript experience, especially in browser environments.
Experience building libraries or SDKs for production or developer-facing use cases.
Strong frontend experience (~80%) with backend familiarity (~20%).
Deep knowledge of browser JavaScript APIs.
Experience writing asynchronous code with parallel execution.
General understanding of the HTTP protocol and web security.
Proficiency with build tools like Vite, Webpack, Rollup, and Esbuild.
Experience with modern testing frameworks such as Vitest, Jasmine, or Jest.
Familiarity with security principles and privacy best practices.
Strong sense of ownership and autonomy in problem-solving.
Clear written and verbal communication skills in English.

JasmineJavaScriptJestTypeScriptWebpack