Salesforce Platform Developer I Certification Guide

Vandevelde Jan:
Jan Vandevelde is a Salesforce MVP, speaker, trainer, and blogger, and a Senior Salesforce Consultant at Salesforce Platinum Partner 4C. He is based in Belgium. He has been working on the Force.com platform since 2009. Currently, he is working as a Salesforce Consultant and is a regular contributor to the Trailblazer Community. He has 15 certifications in Salesforce. He works on all aspects of Salesforce and is an expert in data migration, configuration, customization, and development, with his main expertise being in Sales Cloud, Service Cloud, Community Cloud, and Salesforce Quote-to-Cash. He is the leader of the Belgium User Group of Salesforce. He is one of the board members of Europe's community-led event, YeurDreamin.Roskams Gunther:
Gunther Roskams is a 7x certified Salesforce Application Architect, integration specialist, and Senior Salesforce Developer at Salesforce Platinum Partner 4C. He designs many (integration) solutions and gives advice about how to integrate Salesforce with other platforms or ERPs. Besides that, he still likes to develop nice Salesforce applications with the newest standards and technologies, together with the Salesforce best practices. You can follow Gunther on Twitter via @guntherRoskams, or on LinkedIn as Gunther Roskams.