Salesforce Plugin Development for Sales Methodology

I'm seeking an experienced developer to construct a plugin for Salesforce. Essentially, this plugin should encapsulate a sales framework and methodology, and integrate it flawlessly within the existing CRM system.

Here are few important elements for the project:

- Proficiency in plugin development for Salesforce is necessary.
- The plugin should effectively embed a sales framework and methodology into Salesforce.
- Emphasis is on the integration of sales data.
- Demonstrable experience in handling sales data and CRM data integration will be an added advantage.

Given the nuance required in understanding sales frameworks and methodologies, direct experience in these areas would be a major plus. End goal is to incorporate this methodology seamlessly in our Salesforce usage to optimize our sales process.