We are seeking an expert Web Scraper Developer to build a robust, custom application for large-scale B2B email extraction targeting German companies exclusively. This is a high-volume, mission-critical project. The primary requirement is MAXIMUM EMAIL YIELD. We need a scalable tool capable of reliably scraping AS MANY UNIQUE EMAILS AS POSSIBLE, with a target goal significantly exceeding 10 million unique records. Key Requirements: Scope: Scrape company emails across all of Germany, driven by user-defined keywords (e.g., "Engineering Firm," "SaaS"). Robustness: Must include sophisticated, scalable anti-blocking mechanisms (geo-located proxy rotation, smart throttling, CAPTCHA handling) to ensure continuous operation and access to German-specific search results/websites. Deliverable: A fully documented application (Python/Scrapy or equivalent) and clean data output (CSV/JSON) including Email Address, Company Name, and Source URL. Data Quality: Must perform rigorous de-duplication and basic format validation. Technical Expertise Needed: Proven experience with massive-scale data extraction (million+ records). Deep knowledge of anti-bot strategies and maintaining high uptime. Familiarity with the technical challenges of scraping European/German web infrastructure. Budget and timeline are highly flexible for the right developer who can confidently guarantee the highest possible email volume and uptime. Please detail your proposed technical stack and strategy for achieving a 10M+ email target within German regulatory constraints and technical blocking challenges.