“The www. domain name is a CNAME record that ultimately resolves to Akamai.”
A static page on Akamai, a form in S3 behind CloudFront, and one POST to API Gateway. That is the whole site, and it launched a day early without falling over, which Healthcare.gov never managed. The API key in the page source decodes to “Wake up, Neo…” Boring architecture plus one joke is what a working government website looks like.