A millennial engineer dreamed of a walkable small town with big-city vibrancy. So, she's building it herself.

A millennial engineer dreamed of a walkable small town with big-city vibrancy. So, she's building it herself.

Edge Esmeralda, pictured above, is a pop-up retreat that represents what the future town of Esmeralda hopes to be.Devon Zuegel/Edge EsmeraldaDevon Zuegel, a San Francisco tech worker, longed to live in more of a community.She is building Esmeralda, a small city in Sonoma Wine Country.She hosts Edge Esmeralda, a pop-up event to give people an idea of what Esmeralda could look like.Devon Zuegel graduated from Stanford and moved to San Francisco in…