/* Scoped to this post: allow diagram-heavy figures to bleed beyond the 720px column on wide viewports while collapsing back on narrow viewports. */ .post__entry figure.wide { max-width: 100%; } @media (min-width: 1150px) { .post__entry figure.wide { max-width: 1100px; width: 1100px; margin-left: ca...

Upstream schema changes were breaking our finance pipelines daily. With monthly reporting deadlines looming, we needed to balance data quality with pipeline reliability. Here’s how we solved it without compromising either. We obsessed over data quality. Why? Ideally, we’d like data to be pristine. M...

Metro - modern and kotlin injection framework created by Zac Sweers. And we, Android developers at Vinted, officially and fully migrated to it! It was quite a bumpy ride for our huge codebase. Our story begins… Era before Metro We have a huge codebase of a few hundreds Gradle modules, collected some...

Growing platform - Growing maintenance Keeping the Lights On (KTLO) is an essential, yet often taxing, part of a platform engineer’s role. It represents the routine operational work required to keep the business running and the platform stable. For our team, this primarily involves maintenance on ou...

A few years ago, our platform reached a point where the way we’d always built software simply wasn’t enough anymore. The monolith that powered our early success had served us well, but as the business expanded across the continent, it started showing real limits. Global growth forced us to confront ...

In the first part, we described how growth pushed us beyond the limits of the monolith and forced us to rethink our architecture from the ground up. We explored how Domain Driven Design helped us uncover clear boundaries, and how shifting from synchronous calls to events and sagas changed the way th...

TL;DR: How Vinted standardizes large-scale decentralized data pipelines. When we started migrating Vinted’s data infrastructure to the cloud, we set out to create a decentralized way of working. The idea was simple: teams know their data best, so they should be fully empowered to build, own, and ope...

TL;DR: integrating embedding-based retrieval into the e-commerce search application is a significant undertaking. Introduction The low-recall aspect of the keyword-based search is challenging when dealing with the content which is both very visual and multilingual. Returning “no results” even when t...

TL:DR: When required data can be encoded with match-features, Vespa can apply a new optimisation, which can be a lifesaver when data is frequently redistributed. Use-case When ranking, Vespa requires additional information that cannot be easily stored within the documents being ranked (e.g. the stat...

Inconsistent Redis performance was observed across a fleet of otherwise identical servers. After investigation, we discovered that differences in Linux system clocksource settings - specifically, servers running the slower HPET clocksource instead of the default TSC - led to significant increases in...

TL;DR: Vinted operates a billion-scale search system - time to reflect and celebrate. Current state As of November 11 12:01, 2024, there are 1,000,000,000 documents in the search index. And that number keeps on growing! Figure 1: Searchable documents count When I joined the Vinted search team in lat...