Senior Software Engineer – Javascript/Typescript

🕒 April 1

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Fingerprint

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51 - 200 employees

Founded 2019

🔒 Cybersecurity

🔌 API

☁️ SaaS

💰 $32M Series B on 2021-11

Cybersecurity • API • SaaS

Fingerprint is a technology company focused on bot detection and identification solutions. The platform helps businesses ensure a secure online environment by accurately identifying users and distinguishing between real users and automated bots. They provide developer guides and workspace settings for easy integration into various applications, enhancing security and user experience.

📋 Description

• Build and maintain our browser-side TypeScript/JavaScript agent used for device identification, bot detection, and risk assessment • Engineer for stealth, resilience, and performance—minimizing footprint, resisting detection, and maintaining compatibility across browsers • Optimize for both code size and execution speed in complex, adversarial environments • Stay ahead of browser changes, plugin behaviors, and fingerprinting techniques • Collaborate with backend, security, and data science teams to align signal capture with detection logic • Write comprehensive tests and contribute to CI pipelines that ensure functionality across a wide range of platforms and devices • Contribute to a widely-used open-source project with 24K+ GitHub stars and 25B+ monthly usages

🎯 Requirements

• 3-5 years of JavaScript and TypeScript experience, especially in browser environments • Deep understanding of browser APIs, DOM behavior, timing attacks, and anti-debugging techniques • Experience building libraries or SDKs, especially for production or developer-facing use cases • Strong frontend experience (~80%), with backend familiarity (~20%) • Proficiency with build tools like Vite, Webpack, Rollup, Esbuild, including code obfuscation and minification • Experience with modern testing frameworks such as Vitest, Jasmine, Jest, or similar • Familiarity with security principles, privacy best practices, and adversarial engineering • Comfortable working in fast-paced environments without rigid specifications • Strong sense of ownership and autonomy; you enjoy working independently and solving hard technical problems • Clear written and verbal communication skills in English

🏖️ Benefits

• Remote work options • Professional development opportunities