Smart Home Integration - Google & Alexa

I am seeking an expert who can integrate smart home devices - lighting, climate control, and security systems - with both Alexa and Google Assistant.

Specifics:
* Successful integration with both platforms: Alexa and Google Assistant
* Seamless control of home devices

Ideal candidate:
* Extensive experience with Alexa and Google Assistant
* Proven track record with home automation
* Familiarity with Firebase would be a plus

Your job will be to create an integration that allows me to control all aspects of my smart home system with my voice, directing either Alexa, Google Assistant, or both. Please be ready to provide examples of similar work you've done.