In this episode, I spoke with Eduard Bargues, who is a Principal Engineer at Ohpen, a cloud-native open banking platform.We talked about Ohpen's migration from EC2 to a mix of Fargate and Lambda, and along the way, we touched on many topics:migration patternsthe "serverless-first" mindsethow to choose when to use Lambda vs Fargatewhy monolith functions are painful and should be avoidedrecommendations and pitfallswhy you should build a DX teamWe also talked about how being cloud-agnostic makes you use the cloud in a way that is inefficient and creates many layers of unnecessary abstraction layers in your architecture, which Eduard calls "legacy lock-in"!We talked about their event-driven architecture and how they are using an in-house Event Broker to add FIFO support (which EventBridge doesn't support) for some subscribers. It's similar to what Luc van Donkersgoed talked about in episode 68. We talked about their EventBridge topology and how they manage over 200 AWS accounts, and finally, what are the biggest shortcomings with EventBridge right now.Links from the episode:Job openings at OhpenEpisode 68 with PostNLEpisode 73 with NNLuc van Donkersgoed's Twitter and LinkedInThe decoupled invocation patternFor more stories about real-world use of serverless technologies, please follow me on Twitter as @theburningmonk and subscribe to this podcast.Want to step up your AWS game and learn how to build production-ready serverless applications? Check out my upcoming workshops and I will teach you everything I know.Opening theme song:Cheery Monday by Kevin MacLeodLink: https://incompetech.filmmusic.io/song/3495-cheery-mondayLicense: http://creativecommons.org/licenses/by/4.0