AWS Podcast · Amazon Web Services

#741: Modernizing Edge Infrastructure: Booking.com's Journey with AWS CloudFront and Lambda@Edge

October 13, 2025·1 hr 4 min·3 clips

Ali explains how pre-established CloudFront connections cut remote users' page load times by 30% by eliminating seven round trips.

Episode 741 opens with the practical pressure behind edge infrastructure. Jillian Ford sets up Booking.com's migration as a story about getting pages to users faster, keeping security close to the request, using serverless where it fits, and watching cost. Ali keeps the tour grounded. He follows a customer request from a browser or mobile app, starting with DNS resolving the Booking.com domain. CloudFront becomes the front door for traffic. Its distribution domain sends back an address near the user through geolocation based DNS behavior, so a user in Europe, New York, or California should head toward a nearby edge location. Once that edge location is picked, the browser negotiates HTTP2 or HTTP3. Then the less flashy part does a lot of work. Booking.com keeps pools of connections open from edge locations back to its own origins because setting them up again and again is expensive. Holding those origin connections open for about five full minutes lets many requests reuse the same backend path. Lambda@Edge is part of that request handling layer, though the excerpt does not unpack every function. Jillian ties the architecture back to results: faster pages, stronger security, and that one line of code that saved $500,000. Sarah closes by pointing listeners toward CloudFront and Lambda@Edge as tools for reaching markets, improving customer experience, and leaving room for the product to change.

As heard by us

A grounded edge-infrastructure case study with real operational stakes.

Booking.com's edge migration is a grounded AWS case study, moving cleanly from DNS to CloudFront to Lambda@Edge and always coming back to the business payoff.

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Why you'd press play

A real Booking.com edge migration, with CloudFront and Lambda at Edge in the frame.

Read the full recommendation in PlayNext →

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