We are building a sophisticated, low-latency traffic management platform designed to perform real-time visitor segmentation. Our goal is to develop a "Smart Proxy" that distinguishes between automated crawlers (Ad Networks, Spy Tools, Headless Browsers) and genuine human users to dynamically serve content without traditional 301/302 redirects. The Challenge: You aren't just building a web app; you are building the "Brain" that manages thousands of requests per second. You must solve for sub-100ms response times while performing deep-packet and browser-level analysis to stay one step ahead of the most advanced bot-detection algorithms on the planet. Key Responsibilities & Scope: • The Filtering Engine: Build a multi-layered analysis pipeline (IP Intelligence, User-Agent Parsing, and Geo-fencing). • Advanced Fingerprinting: Implement JS-based detection for "bot-like" traits (missing fonts, WebGL signatures, navigator.webdriver detection). • Cloaked Delivery (The "Ghost" Proxy): Develop a server-side content swapping mechanism (SSI/Reverse Proxy) so that the end-user and the reviewer see different content on the exact same URL. • Edge Integration: Deploy logic via Cloudflare Workers or AWS Lambda@Edge to minimize latency and bypass standard server signatures. • Admin Dashboard: Build a high-performance UI for campaign management and real-time analytics using a modern stack. Technical Requirements: • Languages: Expert-level Go (Golang) or Node.js (built for concurrency). • Data: Experience with Redis for ultra-fast IP lookups and ClickHouse/PostgreSQL for massive event logging. • Infrastructure: Mastery of CDN logic (Cloudflare, AWS, or DigitalOcean) and Serverless functions. • Bonus: Prior experience in Ad-Tech, Cyber-security, or building Anti-Fraud/Bot-Mitigation systems. What We Offer: • A high-stakes, "cat-and-mouse" technical challenge. • The opportunity to build a high-performance engine from the ground up.