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Mobile
Development
Services

Cross-platform and native mobile development focused on React Native and fully native solutions to build or grow your software product.

Our team is experienced in both end-to-end app development
and team extension cooperation models to best meet
your mobile development needs.

Examples of our projects
contact us

Cross-platform and native mobile development focused on React Native and fully native solutions to build or grow your software product.

Our team is experienced in both end-to-end app development
and team extension cooperation models to best meet
your mobile development needs.

Bartosz Klukaczewski
Head of React Native

Why choose mobile development services?

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If your goal is to build your mobile application quickly without sacrificing the quality, you should choose technologies that are native and cross-platform. React Native, which we specialize in, is one such technology.

Although platforms like iOS and Android drastically differ from one another, most of the mobile app code can be shared between them with fully native results.

The popularity of cross-platform, native mobile development is also a significant factor to consider. Facebook, Microsoft, Wix, Shopify, Bloomberg—they all use it.

We specialize
in React Native

and fully native development

Our experience in mobile development dates back to 2014, when we first started developing native mobile apps in Java and Objective-C. Since then, we’ve provided a comprehensive range of mobile app development services for various companies, gradually switching to cross-platform development and growing our skills in React Native.

Over our many years of experience, we’ve been iterating, optimizing, and improving our mobile app development process. Our mobile tech stack keeps maturing and evolving all the time, which is how we eventually moved away from the native-only approach.

As a result of this continuous improvement, we develop primarily in React Native with the option to create custom, native modules in Swift or Java when needed to provide the best quality, user experience, and complete feature set to our clients at a highly competitive price.

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TOP
IT Outsourcing Company and Global Leader

on the independent, objective B2B research platform Clutch.co with an average rating of 4.8 from over 50 client reviews

Our services

Cross-platform app development

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Optimize your mobile app development by sharing as much implementation as possible between iOS and Android—and still get native applications in the end.

We help you perform user research by gathering actionable insights, reviewing the competition, analyzing benchmarks, discovering the best practices, and taking all the necessary steps that will benefit your product in the long run.

Native app
development

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With native app development technologies like Kotlin or Swift, next to nothing stands in the way of you building the exact product you need.

Based on your specific business requirements, we’ll recommend which parts of your app should be fully native and delivered as custom native modules, and which should rather be developed using the cross-platform approach to offer you
the best price-to-quality ratio.

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Automated end-to-end testing

Creating and documenting test cases is very important in the software development process. However, systematic execution of test suites
is even more important.

End-to-end testing consists of automating user interaction with the UI by playing various test scenarios in shorter time and at much lower cost than manual execution by human testers. Delegating the process to machines allows us to execute test suites much more often, which leads to faster issue detection and better overall quality of the end product.

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Process automation

Save time and money by automating repeatable processes like application building and deployment to the AppStore or Google Play.

Automation in general is one of the most efficient ways to gain an advantage in any field. Various activities related to software development—such as the entire deployment or testing process—can and should be automated. This approach also lets us eliminate simple but costly errors that can happen when dealing with repetitive tasks.

Which mobile development
technologies

do we have the most experience in?
  • icon-react-2 React Native
  • icon-type-script TypeScript
  • icon-firebase Firebase
  • icon-detox Detox

React Native is the leading framework for building cross-platform, native apps with React. It follows the “learn once, write everywhere” principle, respecting platform differences in the process, unlike other cross-platform mobile development technologies. This gives you the best user experience, since mobile apps written in React Native use the same UI components as fully native apps.

Apps developed in React Native use JavaScript (or TypeScript), allowing you to benefit from thousands of open-source modules, which can greatly speed up and overall improve the development process by not reinventing the wheel.

Simply put, TypeScript is JavaScript that scales. To compensate for the known issues of plain JavaScript—scalability issues, low maintainability, weak readability, and lack of static typing—we use TypeScript in all of our mobile projects. We also offer gradual codebase rewriting from JS to TS.

Using TypeScript allows us to write code much faster, since it offers better auto-completion and helps us avoid typos and other mistakes before even running the code. TS also makes the code easier to debug, which is another reason why it’s steadily gaining popularity.

Firebase is part of the Google Cloud Platform and targets mobile apps specifically. It’s the industry standard for push notifications via a service called Firebase Cloud Messaging (FCM). Firebase can also be used for easy integration with Google Analytics and Crashlytics for stability reporting.

In addition, we recommend choosing Firebase as a serverless backend using Firebase Firestore and Cloud Functions, since we’ve developed multiple projects with this technology.

Detox is a gray-box, end-to-end testing framework designed specifically for React Native. It’s become the industry standard, since it’s also used by the core React Native development team.

The framework allows developers to automate user interaction, define test cases and expected actions, or even record videos or take screenshots of the app. Automated end-to-end testing in the app saves you a lot of time and money on repetitive tasks like regression testing and greatly improves the quality of the end product.

icon-react-2 React Native

React Native is the leading framework for building cross-platform, native apps with React. It follows the “learn once, write everywhere” principle, respecting platform differences in the process, unlike other cross-platform mobile development technologies. This gives you the best user experience, since mobile apps written in React Native use the same UI components as fully native apps.

Apps developed in React Native use JavaScript (or TypeScript), allowing you to benefit from thousands of open-source modules, which can greatly speed up and overall improve the development process by not reinventing the wheel.

icon-type-script TypeScript

Simply put, TypeScript is JavaScript that scales. To compensate for the known issues of plain JavaScript—scalability issues, low maintainability, weak readability, and lack of static typing—we use TypeScript in all of our mobile projects. We also offer gradual codebase rewriting from JS to TS.

Using TypeScript allows us to write code much faster, since it offers better auto-completion and helps us avoid typos and other mistakes before even running the code. TS also makes the code easier to debug, which is another reason why it’s steadily gaining popularity.

icon-firebase Firebase

Firebase is part of the Google Cloud Platform and targets mobile apps specifically. It’s the industry standard for push notifications via a service called Firebase Cloud Messaging (FCM). Firebase can also be used for easy integration with Google Analytics and Crashlytics for stability reporting.

In addition, we recommend choosing Firebase as a serverless backend using Firebase Firestore and Cloud Functions, since we’ve developed multiple projects with this technology.

icon-detox Detox

Detox is a gray-box, end-to-end testing framework designed specifically for React Native. It’s become the industry standard, since it’s also used by the core React Native development team.

The framework allows developers to automate user interaction, define test cases and expected actions, or even record videos or take screenshots of the app. Automated end-to-end testing in the app saves you a lot of time and money on repetitive tasks like regression testing and greatly improves the quality of the end product.

Why work
with STX Next?

We understand that each mobile app is as unique as the business it’s meant to serve.

Over the years, we’ve had clients come to us at very different stages of development, looking for support. We never let them down or were caught off guard.

Here’s what you can expect from us if you find yourself in any of the following situations:

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1
I want to build a mobile app, but I can’t decide if I want to choose React Native or go fully native. What can you recommend?

Whenever we start working on a new mobile app, we first ask ourselves what tech stack will be the best fit to develop all the required features and provide the best quality at the most competitive price and timeframe.

With React Native, it’s important to keep in mind that it works within a native context. That's why React Native will always give you some native code. The only question is: how native will it be?

To determine that, we’ll first decide which particular features of your mobile app can be done using React Native with open-source modules, and which should be fully native and developed from scratch.

We’re fully prepared to help you with development in both approaches. Based on our experience delivering over a dozen React Native projects, we’ll advise you individually which approach is optimal in your specific situation.

2
I have a vague business idea, but I’m not sure about the details of what I want. What can you offer me?

With each new cooperation, our first priority is to understand the business context of your project, so we can support you much better than by simply providing you with development services.

At this stage, we usually recommend running discovery workshops, during which we meet with you and together define, extract, and prioritize user stories. We ask in-depth questions to verify the market potential of your initial idea and make sure it is the right one. Sometimes, this might lead you to decide to take your project in a new direction.

As part of the process, we also work on designs or even develop a clickable prototype. This is an extremely useful early step of the development process in end-to-end, product-based cooperation.

After the discovery workshops, the product vision of all the team members is aligned, and with the artifacts created during the session, development can start right away and much more effectively, since the initial planning will have already been done.

3
I’ve already started developing my mobile app, but I’m not too happy with it. Can you take over the project?

Yes, of course. We can support you at any stage of development, even when we’re not building your product from scratch.

In such cases, we usually start with an audit to identify both the positive and negative aspects of your current codebase.

We’ll also root out any potential security, UX, or code quality issues and present you with a specific plan on how to fix them.

Examples of mobile development

projects we’ve delivered

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Industry: Lifestyle

NOTA NOTA

Express yourself by creating perfumes for every occasion in the comfort of your home, using a mobile app.

NOTA NOTA consists of a tailor-made perfume-making machine that can mix various basic scents, creating unique fragrances. The user controls the machine via a mobile app using Bluetooth LE connectivity.

The app allows users to design and produce custom, unique perfumes and share their recipes with the community using the social platform within the app that connects creators and designers from all over the world. Users can try out the perfume recipes, as well as rate them or comment on them.

featured in
design-award-2018
read the portfolio entry
project-tiles-1-1
Industry: Education

Zappi

Zappi is a UK-based startup focusing on education.

Zappi’s goal is to revolutionize the way temp teachers cooperate with local schools. The app allows temp teachers to find work at UK schools in a simple, effortless way.

By setting their availability, teachers benefit from receiving live job notifications through a transparent, two-way feedback system that ensures they’re ready for each work assignment, while cutting out the need for agency calls and tons of paperwork.

Within this comprehensive project, STX Next created a mobile app for teachers, a web app for school managers, and a backend solution in Python with GraphQL. We also designed the majority of the UI/UX.

read the portfolio entry

All of our case studies

During our 15+ years on the market, we have delivered 350+ projects for 130+ clients in several dozen industries, ranging from fintech and big data to education and advertising.

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Cooperation models

End-to-end product development

We have all the necessary competences to build any mobile app you need according to your ideas and requirements—on time and within scope. We’ll optimize the solutions to your budget and support you from start to finish.

It’s no issue at all if the mobile component is only part of your whole project. We work closely with other departments, such as Product Design, to help you create top-notch software products as a single team. Together, we use the Discover–Define–Develop–Deliver workflow and lend our expertise to the entire production process.

This multilayered internal cooperation sets us apart from the competition and extends to the discovery stage of your development as well. Our developers take part in the discovery workshops alongside the Product Consultant and Design Lead to provide technical support from the get-go and help unlock the full potential of your product.

Lastly, we rely on continuous feedback to get input on our deliverables after each iteration as quickly as possible. This allows us to constantly improve your product and make better decisions faster, saving you time and money in the process.

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Team extension

Team extension is the simplest way to increase your development capacity. By adding external team members, you can speed up projects in progress or kick off new projects alongside your current work. Think of it as adding new talent to your roster instantly—but at a different office.

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Mobile development services we’ve provided

to our clients
end-to-end-mobile-app-development End-to-end mobile
app development
icomoon-free-android Android
development
ant-design-apple-filled iOS
development
icon-reactnative-hover-1 React Native
development
prototype-development Prototype
development
react-custom React Native custom native
module development
data-vis Data
visualization
mvp MVP
development
technology-consulting Technology
consulting
technical-audit Technical
audit
automated-end-to-end-testing Automated
end-to-end testing
build-and-release-automation Build and release
automation
Why is STX Next

the right development partner for you?

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Over 6 years of mobile development experience

Since 2014, we’ve been perfecting our mobile app development process and growing our React Native expertise to be a worthy development partner for you.

Full range of complementary services

In addition to mobile development services, we have everything you need for a long-term, end-to-end tech partnership.

We’re hungry for a challenge

Our reputation attracts the best mobile app developers you can hire. These top-notch specialists are always out for a challenge, ready to give 100% of their software development skills into any project that needs it.

Cross-functional mobile development teams

Our teams will work exclusively for you, pooling their talents to build you the best mobile app possible. In the majority of cases, one team sits in one room working on one project, ensuring full focus.

True project ownership

We will build your mobile app as if it was our own; our reputation depends on it. We are interested in why you want to build your product, not just what it is or how to build it.

What do we promise

if you partner with us?
A true partnership only works if both sides bring everything they’ve got to the table. Here’s what you can expect when you join forces with STX Next:
Outstanding, non-corporate atmosphere, team spirit, and great people to work with
Expert knowledge and understanding of mobile app development programming languages
Tried-and-tested use of the best mobile development practices
Extensive specialization in working with native functionalities, like Bluetooth or Biometrics
Demonstrated experience in implementing delightful user experiences and optimizing the development process by introducing automation
Effortless English communication skills
Truly Agile working environment composed of small, independent teams working in Scrum with a flat organizational structure
Expertise in using code-versioning tools, such as Git
Strong skills in unit testing and debugging
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Who trusted us?

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dcernis-logo-bw decernis-logo-color
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logo-notanota nota_nota_logo
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What our clients say

C-level executives, product managers, tech leads, and founders from around the world have appreciated our help in delivering world-class products under strict deadlines.

The feedback we get from our clients is consistent. We take real ownership. We happily serve as mentors in tech and Agile. We listen to real business needs instead of just shipping features.

The team is very product oriented - they try to understand the product and its end users. This means that there are more sets of eyes looking after potential User Experience issues, which results in a better product.

Ron Shteinberg
Head of Product and Operations @ Newable
Acquired by png-transparent-apple-logo-business-iphone-apple-heart-computer-logo

Apart from their quality of work and timeliness, it was important for us to have clear communication. STX Next met this expectation very well.

Nitsan Avni
Mobile Development Lead @ RealFace

They have a genuine interest in their client’s business environment. Their Scrum teams were more like an extension of our own team than an external entity. They don’t force a template on their client, focusing instead on delivering software in a way that compliments the client’s own process. Our work together resulted in award-winning products that we would not have otherwise delivered.

Owen Thornton
Software Development Manager @ BetBright

Working with STX Next felt like a strategic partnership rather than outsourcing. From consultation through to development and delivery, the STX Next team integrated seamlessly within our own team, in a challenging technical area, and delivered to the same standards we expect from our internal developers.

Michael Stone
Chief Technology Officer @ Enroly

One key highlight was their ability to take complete ownership over their work, paying close attention to each detail and always taking into account the end-user and the overall business goal.

Gilad Amir
CEO @ Paze

We really appreciate working with STX Next, because of their dedication to quality as well as their effort to meet always the deadline - even in a very challenging project phase.

Dr. Holger de Bie
Innovation Manager @ finstreet
Featured in logo-techcrunch-1

It was always a team that showed initiative, not just receiving instructions to deliver features but also asking why and what we were building so that it quickly became much more collaborative.

Mark McLaughlin
CEO @ Coras.io
Featured in forbes

It's been an absolute pleasure working with the engineers at STX: from day one they've shown a huge amount of professionalism and drive to deliver great results quickly. It's been easy to discuss different approaches, whether it be technical solutions, better ways to work together, or product decisions from a user perspective. This has ensured we've achieved the best outcomes.

Chris O'Reilly
CTO @ Deuce Tennis

What other services
do we offer?

Web

DEVELOPMENT SERVICES

Product Design

SERVICES

JavaScript

DEVELOPMENT SERVICES
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