Custom B2B Lead Gen Tool

## B2B Lead Generation Platform

I’m looking for an experienced full-stack developer to build a **B2B lead-generation platform** that allows me to search for business prospects worldwide, filter them by different criteria, verify business emails, and export qualified leads to CSV.

### Main Features

* Search businesses worldwide
* Filter by:

* Industry
* Country / city / region
* Company size
* Job title / contact role
* Other available firmographic data
* Use reliable **licensed APIs/data providers**
* Collect available company and business contact information
* Email verification with deliverability status
* Custom filters, tags, and lead management
* Search results with pagination
* Bulk lead selection
* One-click CSV export
* Secure database
* Admin dashboard
* API key management
* Usage limits / quotas
* Search and export history
* Error handling and logging
* Clean, responsive interface
* Documentation and deployment instructions
* Short video walkthrough explaining how to use and maintain the system

### Data Providers / APIs

Please recommend the best combination of providers based on **data accuracy, coverage, API cost, and legal/ToS compliance**.

Possible providers include Apollo, Hunter, Crunchbase, Clearbit/HubSpot, People Data Labs, or other suitable providers.

I am open to your recommendation rather than requiring a specific provider.

### Preferred Technology

I’m flexible regarding the technology.

Python/FastAPI, Node.js, React, PostgreSQL, or another modern scalable stack is acceptable.

### Proposal Requirements

Please include:

1. Recommended data providers/APIs and why
2. Recommended technology stack
3. Estimated total cost
4. Estimated development timeline
5. Milestone breakdown
6. Examples/screenshots of similar lead-generation systems you have built
7. How you would handle data accuracy and email verification
8. How you would design the system for future scaling
9. Deployment and maintenance requirements

**Important:** Please do not simply send a generic proposal. Explain specifically how you would build the search → filtering → verification → export workflow.

I’m looking for someone who can build a **working, maintainable platform**, not just a basic scraper.