Advanced GoLang Build with Essential Features

I'm looking for a highly experienced GoLang developer to enhance an existing code build. The features that need to be integrated are user authentication, data encryption, and database integration.

Key Requirements:

• Advanced skills in GoLang are a must.
• Proven experience in integrating user authentication, data encryption, and database connection management into GoLang Builds.
• Must provide examples of previous GoLang projects.

Your application should focus predominantly on your experience, especially with respect to similar projects. If you fit these requirements, I look forward to seeing your proposal.