User interface and mobile app engineering

This white paper explores how Vercel frontend deployment innovations, including developer experience optimization, fluid computing, and AI-assisted development, enable organizations to accelerate development velocity by 30-50%, improve global performance by 30-50%, and reduce infrastructure man...

Download the white paper to get your hands on a comprehensive guide on the privacy and performance benefits, as well as implementation, optimization, and security best practices of client-side AI. Below is a taste of what you can expect, with more in-depth details, code samples, and actionable...

When it comes to the best web development frameworks, finding the right balance between efficiency, creativity, and maintainability is key to building modern, responsive designs. Developers constantly seek tools and approaches that simplify workflows while empowering them to create visually strikin...

Accessibility is a critical factor for businesses across various industries, including retail, technology and media, insurance, FMCG, HORECA, and manufacturing. The potential impact of neglecting accessibility can be immense, not only from a legal standpoint but also in terms of lost revenue an...

Booking online travel is not easy, unless it's on the best apps. But what makes their UX so good? We take a closer look.

Lessons in the perils and pitfalls to avoid—and the opportunities to seize—in the course of your app...

In the rapidly-evolving digital landscape, the performance of an application can dramatically influence a company's success. Users expect fast, efficient, and smooth experiences, and failing to meet these expectations can result in losing customers to competitors. ❔But what does it really...

The Grid Dynamics' UX/UI team undertook a comprehensive redesign of a client's web and mobile apps, recognizing the pivotal role of digital customer experience in boosting revenue and conversions for consumer-facing businesses. Following a design thinking approach, the team's tasks included definin...

According to the 2022 Disability Statistics: Information, Charts, Graphs and Tables report, around 10% of the world population lives with a disability. People with hearing, movement, sight, or cognitive ability impairments require web applications without any barriers for communication or inte...

Cross-platform technologies have revolutionized the way developers create mobile and web applications. These frameworks allow developers to use a single codebase to build applications that run across different devices and platforms instead of writing separate code for each platform. Moreover, eac...

When our team embarked on the project to redesign the interface of a critical reporting tool for one of the world’s largest athletic apparel companies, we knew we had a big challenge ahead of us. Not only did we need to extend the interface toolkit, but we also had to ensure that the new design wou...

We built an Augmented-Reality-powered space and product measurement application for a leading specialty retailer in the storage and space organization market. By offering the AR functionality in the client's mobile app, consumers save significant time and effort by being able to measure, coordinate...

There has been a noticeable surge in interest in augmented reality (AR) in recent years, as demonstrated by the release of new updates from major technology companies such as Apple and Google. With that in mind, the mobile development team at Grid Dynamics conducted some additional research into AR...

A virtual world where we live, work, shop, and interact with others may have sounded like science fiction a few short years ago, but it’s fast becoming a tangible reality. This virtual world is called the Metaverse: a digital ecosystem made up of decentralized, user-generated platforms that provide...

For retailers, it’s no secret that a critical component of a commercial website is a delightful and compelling user experience. If customers can’t find your website though, the value of that user experience goes out the window. Recognizing the combined value of user experience and SEO, this global...

Looking to take customer engagement to the next level, the client requested a mobile application that could run on the iOS platform, and be expanded on the Android version later, for a specific group of customers, providing a personalized and unique customer experience. To create the best possib...

In today’s digital age, visually appealing web applications are not enough to please customers. Providing compelling customer experiences through fast, easy-to-use web applications is a critical component of any competitive business strategy today. Deliver a downright delightful user experience, ra...

We share our experience of migrating a monolith app to micro frontends using webpack module federation What does a web application usually look like? Most often it is a monolith with a single code base where the whole team merges the code, and a single pipeline where everything is deployed at...

It is no surprise that the outbreak of COVID-19 accelerated the adoption of AR technology. The transformative challenges posed by the pandemic urged businesses to find new approaches to customer engagement, and advances in human-computer interaction and AR have high potential in that regard. Th...

Discover how we migrated an AngularJS application to Angular 4. We share our step-by-step experience of migrating a financial web application. In the life cycle of each long-lasting, enterprise-size web application there comes a time when it becomes too large to integrate innovations, add brand...

Guide on web pages media (images, GIF, animations) optimization. Image optimization techniques & examples (compression, lazy loading). Our brains interpret images much faster than text, which is why high-quality visuals drive conversions and user engagement. To be effective, all images o...

Since there is a lot of hierarchically structured information in the real world (e.g system folder structure, animal/plant classification, company management, etc.), and the tree chart is a perfect data structure for the storage of hierarchy information, an effective method of tree visualization be...

There are many architecture approaches used in the Android development field nowadays. You have probably already chosen your preferred methods and strive to use a unified approach when writing your applications. However, in some cases many approaches have to co-exist in the same project, often in...

In the current on-demand marketplace, customers dictate the rules of engagement. And with the rapid rate of cool new features becoming available, businesses need to be ever-present and just as rapid in development and delivery. Our client, one of the largest department store chains in the US, en...

Let’s just imagine what it’s like for a major e-commerce website in the weeks leading up to the Christmas holiday shopping rush: they’ve horizontally scaled their server, prepared a proper marketing campaign, and calculated their revenue projection. It takes a lot of planning to pull everything off...

In this manual, we share our experience of using D3.js in React to build custom, scalable, and engaging charts via creating reusable components. We recommend this article for: React developers ready to start with D3.js Web developers engaged in implementing data-driven UI Anyone inte...

There are a number of technical, educational, and organizational issues that commonly lead to failure in test automation. This is confirmed by two recent surveys from 2017 and 2018, which found that only 19 percent of teams are able to implement test automation correctly on the first attempt. Th...

In this article, we’ll be discussing Next.js image component usage and the performance and accessibility benefits it offers. So if you’re interested in improving the performance of websites and want to learn a bit more about how this component works under the hood, then you’re definitely in the rig...

Have you ever heard of Spiral Dynamics? It’s a sociological theory about the cultural levels of a society. There is a model of the evolutionary development of individuals, organizations, and societies based on it. And the concepts behind this model can also be applied to any organization o...

Working from home was never more fun than these days of pandemic and lockdowns. We all stay connected with video conferencing,  and, with obvious benefits of seeing friendly faces of our colleagues, we get all the drawbacks of exposing not-so-glamorous aspects of our work-from-home lives...

After we made all the necessary decisions regarding the general architecture, it was a time to think about the implementation details. We needed to build all the necessary screens and organize navigation between them. Navigation details have already been described in the first part of the artic...

Before moving to the problem of choosing and applying a package manager in our project let’s define the list of features we want from a dependency manager usage perspective: A simple, reliable and efficient integration with CI / CD User friendly interface Minimum effort for imp...

Mobile applications help enterprises reach higher levels of success by increasing sales and providing improved experiences to their users. The share of sales generated via mobile applications continues to rapidly rise year over year, reflecting the increasing importance of mobile technologies i...

With the increasing popularity of Progressive Web App (PWA), we thought it would be the ideal time to explore the differences between PWA and other approaches to building mobile user experiences. To conduct this research, we gathered a list of the most important mobile application criteria and fr...

Consumers pay attention to ratings, and you should too. Ratings are indicative of an item’s quality, and people give bad ratings when they have a terrible experience. In this case study, we explore how to raise your app rating and what effect this has on mobile app revenue. For purposes of this...

How bad can a 3.7-star rating really be? Imagine a Fortune 500 retailer with considerable online revenue, but only a minuscule fraction of online sales derived from their mobile app. In fact, this exact retailer approached us, asking for assistance. To help them get their mobile app revenue back...

Your product is good. Your mobile app has great features, but your app store rating is low. What happened? In a previous blog post we demonstrated that high crash rates can cause low app ratings. In this blog, we explain how we analyzed negative reviews to determine what motivated customers to...

These days, every retailer has to be mobile-friendly to be competitive, but our client was ahead of the curve. They wanted to provide their largely teenage customer base, who prefer to use mobile devices, with a truly awesome mobile experience. They realized that in order to make this leap into t...

“But I already have an Android and iOS app, why would I need Flutter?” After you read this blog post, the answer will become obvious - to save time and money. “I understand the advantages of Flutter, but can't afford to throw away my current apps and restart in Flutter.” You won't need to! In th...

Many retailers face a tough decision: should their mobile retail shopping app support Android or iOS? They feel their limited resources cannot be stretched to build and support both platforms, so they often pick just one. Some retailers may have already committed to one platform, but are unsure...

Many large brick-and-mortar retailers lack a strong mobile app experience, which is a problem on days like Black Friday and Cyber Monday, when online traffic soars. In the 2018 holiday season, 79% of all purchases involved a mobile device - this includes customers that made a purchase, looked up...

Cool AR apps were possible before, but now they have become increasingly sophisticated, thanks to new features in Google's ARCore and Sceneform. Objects can now be placed on vertical planes such as walls or doors. 3D images render faster and more easily, and augmented reality scenes can be shared...

Write once, run anywhere. This is what mobile application developers have long been promised. One code for both Android and iOS No performance issues One engineering and QA team for all mobile development One common user interface utilized across all platforms that is visually...

Unit tests are the de facto standard for establishing a consistent product and an efficient continuous delivery process. They force you to write well-structured code that is split into modules with clear interfaces between them. Unit testing is necessary to safely refactor your code. In this p...

In the previous post we discussed which models we tried for sentiment classification and which one has demonstrated the best performance. In this post, we’ll show you how to visualize our under-the-hood findings so that others can see the results of our analysis. You can see our twitter senti...