Marissa Mayer's app cofounder just quit — days after their Shine photo-sharing app debuted

• Marissa Mayer's company just launched Shine, a photo-sharing app.
• Enrique Munoz Torres, the cofounder, just quit the company.
• He posted to his LinkedIn it was "most rewarding experience in my professional career."

When former Yahoo CEO Marissa Mayer tweeted about the launch of her new app, some people roasted Shine's outdated aesthetic and questioned the purpose of the photo-sharing app.

Shine was the third app launched by Sunshine, a company Mayer co-founded with Enrique Munoz Torres, who had also worked with Mayer at Yahoo and Google before that.

Sunshine's apps were deceptively simple: a birthday reminder app, a contact-management app, and Shine, a way to pool photos taken by different people at the same birthday party or event. These apps had some light AI integration and probably appealed to boomers.

Munoz Torres posted this note on his LinkedIn on Wednesday:

After six years, yesterday was my last day at Sunshine.

Starting and running Sunshine was an amazing learning experience and I am immensely proud of the products we built and grateful for the co-founder and team that I had the privilege to work with. Startup life is not easy, but it has been hands down the most rewarding experience in my professional career, which made my decision to leave a very tough one. I am confident that Marissa Mayer and the Sunshine team will keep developing amazing products and wish them nothing but the best moving forward.

In terms of what's next, in addition to the cliché "recharging, spending time with family, and figuring out what to do next" (all of which are true), I have a personal goal of learning SwiftUI and understanding LLMs at a much deeper level. I welcome any pointers on how to get started on either of those. And, of course, I'd be thrilled to have discussions, bounce ideas, or simply reconnect.

Munoz Torres told Business Insider he didn't have a comment beyond his LinkedIn post.

A representative for Sunshine told Business Insider: "Enrique played a pivotal role in our team's work developing Sunshine's products, including the recently-released Shine app for photos and events."