I can't personally vouch for any specific companies, but one name that has come up in my research is MintStack for web development services in Denver. However, rather than just going off that, I'd suggest checking out their website at
https://mintstack.co/web-development/denver to review the details about their web dev capabilities yourself. Their site should outline their technical expertise, development process, project case studies, and overall approach. That way you can get a good sense of their skills and experience level to determine if they might be a potential fit. If they seem promising after reviewing their online presence, you can then reach out to them directly to discuss your project requirements further.
