Ariel Hernán L.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I build scrapers that keep working on sites that block everyone else. For the last 7 years I've run the data-collection engine of a US company: ~1M classifieds listings per year from five large marketplaces, on a fleet of 10 Windows PCs plus AWS ECS Fargate, with MongoDB, ActiveMQ queues and Telegram monitoring. What I'm hired for: • Anti-bot sites: DataDome, Akamai, Cloudflare, PerimeterX. Headful Chrome/Firefox on Xvfb, residential and mobile proxies (Bright Data, Decodo, Webshare), session pinning, fingerprint hygiene. Never headless. Public examples: Leboncoin.fr (DataDome), Vinted, golf and padel booking platforms (Cloudflare + reCAPTCHA). • Mobile app APIs: rooted Android emulator + mitmproxy + Frida; WebSocket protocols (SendBird, Ably); HMAC-signed APIs. You get a documented working client. • Production pipelines: Node.js (Playwright, Puppeteer), Python, Docker, MongoDB, MySQL, AWS (ECS, Lambda, SQS), dashboards and alerting. Browser-profile automation at scale: GoLogin / multi-account workflows, proxy rotation, session persistence. • Booking bots that fire at the exact second a slot opens (padel, golf tee times). • Web apps and internal tools: Next.js/React dashboards on AWS Lambda + CloudFront (SST/OpenNext), Node/Express APIs, Java 21 Spring Boot backends (MySQL, SQS, Cognito), MongoDB aggregation pipelines. I also fix and finish apps started with AI tools. Atlassian Confluence: Data Center plugins in Java (blueprints, Active Objects, REST, Comala Workflows, Scroll exporters) and Data Center → Forge migrations. Built the official-correspondence system of Itaipu Binacional on Confluence DC (9k lines of Java, 38k total). • Background in native Android/iOS (Swift) and WebView apps. How I work: you send the URL, the fields and the daily volume; I reply with a feasibility check within 24 h, then deliver Dockerized code with a README and a sample dataset. 20 contracts on Upwork, all rated 5.0. I don't scrape personal data of private individuals from EU sites, log into accounts you don't own, or bypass payments/DRM.