Blog: Wolt Tech Blog

Our Wolt Tech Blog has moved

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Enhancing User Experience with Advanced Image Formats

Efficient image delivery lies at the heart of successful online experiences. It affects both user engagement and search engine optimization (SEO) rankings. In early 2021, we identified a need to expand beyond our conventional JPEG encoding service and began to explore more innovative image processing solutions.

Scaling the Wolt Merchant App to Serve 30x More Users

In this blog post, you'll learn how we scaled our new Wolt Merchant app backend.

Type safe data access with jOOQ and Kotlin

In this article you will learn how to access your data in a truly type safe manner with jOOQ and Kotlin using forced types.

An overview of the multi-page scrollable bottom sheet UI design

In this blog post, we'll explore the foundational design decisions that guide the WoltModalSheet's functionality. More specifically, we'll focus on how we designed the bottom sheet.

Behind the scenes of Wolt Hackathon 2023

Take a peek at what happened behind the scenes of Wolt Hackathon 2023!

Scaling our merchant app with Flutter 

In this blog post, we’ll be covering the story of how we decided to deprecate our existing iOS application for merchants and move to a new app written in Flutter... as well as the bumps we encountered during the process.

How to build a good API with Kotlin

A well designed API can save you plenty of time later in development. Here's how to build a good API with Kotlin.

From Polling to WebSockets: Improving Order Tracking User Experience

Where is my order? Is the app stuck? Even when everything else in an application is polished, the user experience might be far from delightful if the information on the screen rarely updates. In this blog post you'll get insights on how we have improved order tracking user experience at Wolt.

Zoom-in-and-out: An approach to designing operational tools

In this blog post, our Senior Product Designer Giang Nguyen describes the "Zoom in and out" approach used in the product design for Wolt market.