Yyyyep. Step into one of Walmart's cubicle farms in Bentonville, Arkansas and it's mostly middle aged folks hacking away in C# and VB.
The bootstrapped, 6-year-old former startup I work for is filled with people from their 20s on up past 50s making, selling, and supporting Software as a Service, with the developers hacking away at a RESTful API and Ember.js apps. Plus, we share the building with Kickstarted startups like Pixel Press, VC-funded startups like TrakBill, etc. and we're a couple blocks from an incubator + coworking space with 80 startups at every stage.
Being away from Silicon Valley doesn't make you automatically boring, or a cubicle farm, or even full of old people
"RESTful API", "Ember.js apps", "Software as a Service", "sharing the building with kickstarted start ups".