Introduction

Travel connectivity has undergone a massive shift over the last few years. Physical SIM cards are rapidly being replaced by embedded SIMs (eSIMs), allowing international travelers to download carrier profiles directly to their devices before boarding a flight. For developers, product engineers, and technical founders, this transition from hardware to software introduces an interesting data-engineering challenge: how do you build a reliable system to compare travel connectivity options when the underlying source data is inconsistent, fragmented, and constantly shifting?

At first glance, comparing digital SIM plans might seem straightforward. After all, every plan has a price, a data allowance, and a validity period.…