Build an Advanced Bot to Discover and Monitor 10M+ Trading-Interested Users

I am looking for a highly experienced developer or technical team to build an advanced, scalable system for discovering, monitoring, and analyzing people interested in:

Trading
Automated Trading
Algorithmic Trading
Programmatic Trading
Trading Bots
Quant Trading
Copy Trading
Trading Indicators & Strategies

The idea is to build a large-scale search and monitoring engine that operates 24/7, not just a simple web scraper.

The system should be capable of discovering relevant accounts and users across as many sources as technically possible, including:

X / Twitter, Reddit, LinkedIn, YouTube, TikTok, Instagram, Facebook, Discord, Telegram, forums, blogs, specialized communities, and other relevant websites.

The ultimate goal is to build a database of more than 10 million relevant accounts, while collecting and classifying as much publicly available information as possible about each account.

Once accounts are discovered, the system should continuously monitor their activity and the content they publish.

I will be able to define keywords and specific topics, and whenever a monitored account publishes content related to those keywords or topics, the system should detect it and send me an alert.

The system should also be capable of:

Continuously discovering new relevant accounts.
Classifying users based on their interests and activity.
Detecting and removing duplicate accounts.
Linking the same person across different platforms where reasonably possible.
Searching and analyzing published content.
Monitoring millions of accounts efficiently.
Creating alerts based on keywords, topics, and predefined conditions.
Storing and processing tens of millions of records at scale.
Providing a dashboard for searching, filtering, managing accounts, keywords, and alerts.
Allowing new platforms and data sources to be added easily in the future.

Important: The actual project is significantly deeper than this brief description. Full requirements and details will be discussed with the selected developer.

I am not looking for someone to build a basic scraping script. I am looking for someone with real experience building large-scale systems involving Web Crawling, Social Media Monitoring, Data Pipelines, Large-Scale Databases, APIs, Search Engines, Distributed Systems, and Real-Time Monitoring.

Preference will be given to developers who have previously built systems that collect or process millions of records and who can design the right technical architecture for this project.

You should also understand the technical limitations, API restrictions, rate limits, and compliance requirements of different platforms rather than making unrealistic promises.