Web application development custom services

Build usable, high-performing apps for all screens and devices

Why go for outsourced web app development services

So you need a web app. Maybe it’s a marketplace, an ecommerce store, or a SaaS platform. Or maybe it’s a reworked version of your existing web app that needs a little (or a lot) TLC. Or maybe you need to integrate your web app with other software. Whatever your web app development needs are, you’re probably best off finding people who have built and rebuilt dozens of apps across industries and who understand business in general, too.

At least that’s what we recommend. And if that’s not what you have access to in-house, or if you’re short of resources within your organization, finding an experienced web app development company is probably your best bet. 

The thing with web app development is that usually, you’re after a product that is supposed to make you money. It’s often the core of your business or one of its major components. So, of course, it needs more than just code and fancy features. It needs to be usable, and it needs to answer the actual needs of your customers. Otherwise, we’re just looking at a (probably) nice piece of software that nobody will use. And that’s not what we like to do at DeSmart.

Web app development at DeSmart is a comprehensive process taking you from ideation and idea validation throughout the entire product development cycle right until you’re ready to go to market with your app. Our team is skilled not just in frontend and backend development but also in UX/UI design and product development, so we come with the whole package.

If you don’t need the whole package, though, you’ll still get the right experts for your kind of project. They can work alongside your team, or you can just hand over the entire thing to us. We’ll figure that out together first to find what works best for you (and us.)

What does custom web app development include?

(If you don’t really need to read the answer to this question, scroll down to learn more about the specific custom web app development services we offer at DeSmart.)

Web app development is – guess what – the development of web applications, backend, frontend, and all. (And yes, we’re doing this for the SEO. Mostly.) Depending on the type of the actual web application, we’re talking about things like

  • The product discovery phase including elements like impact mapping and business canvases. At DeSmart, we’ll use that time to validate your software assumptions and your business model for the software. We’ll also research your target audience, define the features your users want and need, and suggest the best technology to build them in.
  • Backend development for your web app to create the logic and mechanics behind it, making sure it’s stable, scalable, and secure. And that it’s going to last you a long time, even as new tech developments start dominating the market.
  • Frontend development to get you high-performing and good-looking apps your users will love interacting with.
  • Web design and UX/UI services so that they love it so much they won’t want to leave.
  • API integrations with other web apps and software systems, so you can connect it with your internal software or give your users more options by letting them use your app in conjunction with others.
  • Cross-platform app development, so you can get a web app that also looks and works great on mobile devices (and vice versa.)
  • Modernizing legacy web apps to improve their performance, security, and user experience.
  • Growing existing apps with new features, letting you answer your user requests or enter new markets and address new audience segments
  • Quality assurance testing to evaluate the speed, performance, and scalability of your web applications.
  • And more.

Now, if you’re looking for an experienced web app development company for your next project, scroll down to see what we offer and why you should at least set up a chat with us.

Web app development services at DeSmart

  • Custom software development

    Build a web application from scratch – marketplaces, SaaS platforms, e-commerce stores, and more.

  • Software integration

    Scale your app and integrate it with other software systems to increase the value for your customers.

  • Web application modernization

    Improve underperforming apps and redesign outdated user interfaces to match the changing requirements and needs of your users.

  • Web design services

    Delight your customers with an impeccable user experience in your app and a design that’s a pleasure to look at.

  • Single-page applications

    Get a fast-performing and user-friendly single-page application for your SaaS platform, CRM, booking service, etc.

  • Product development

    Work with experienced product owners who will help you build a profitable app with that product-market fit you’re after.

Why choose DeSmart’s web app development services?

We’re a product-led team of senior devs with 20 years of experience in web app development across platforms and industries. And beyond the actual software development, our team has superior skills in product development. 

We can guide you through the entire product development process to build your MVP. So that we know we’re, in fact, creating something people will need and want to use – and not just something someone thought it would be a good idea to develop.

Our Web App Development Tech Stack

  • JavaScript

  • React

  • Vue.js

What our clients say about our web app development services

DeSmart Software Development has succeeded where several other companies have not. I started this project with a certain vision of what I wanted, but no other companies have been able to provide me with what I wanted. With DeSmart Software Development, I have gotten what I wanted and more.
We received a great deal of effort for our money, and I’m happy with our collaboration. The quality of work was professional, and their team identified any bugs by themselves most of the time. Based on the ideas we provided, they came back with an improved solution. They also gave us extra product functionalities.
The initial meeting we had with DeSmart before we started the project was really effective. I recommend doing so if you have the opportunity. Also, their communication, speed of development, and expertise were impressive. DeSmart was excellent at providing their own ideas, which benefited the project greatly.
DeSmart is synonymous with service quality. The company works in a truly agile mode, regularly delivering work increments, which allows to quickly and easily synchronise on requirement details. I was especially impressed with the dev team’s capability to quickly learn and start using our new APIs.
I’d highlight that their ability to adapt is exceptional. We didn’t go with a fixed scope and ended up with a different product than we’d had in mind. They were accommodating of changes and adjustments. That made them very easy to work with. They were also very transparent about pricing, which we appreciated.
I was impressed with their developers' efficiency, speed, and flexibility . Cooperation was smooth and uninterrupted. Monitoring of resource consumption to be improved. Great culture fit. Good value for cost. Company values aligned.


We realize you might not be familiar with all the aspects of the software development process. So here are a few pointers and explanations you might find helpful. And if you have more questions, send us a message, and we’ll get back with the answers.

What are the first steps when we start working together?

1.We always start with consulting your project with our product and business teams to see if we’re indeed a good fit.

2.We’ll then create a cost estimate and a proposed timeline.
Then we’ll organize workshops to help us define the business and product requirements so that we can build the best software solution for your needs. The people who took part in the workshops will make up the foundation of your project team.

3.We sign the contract and set up a kickoff meeting to nail down all the project details.

What are the benefits and drawbacks of the technologies you use?

Our development team will talk you through all the benefits and drawbacks of a specific technology for your specific project so that you know all you need to know to make your decision before you actually make it.
One of DeSmart’s core values is transparency, and we always inform our clients about any risks involved.

Will I work with a dedicated contact person on your team?

This really depends on your requirements. We have project managers, testers, and developers on board, and everyone’s equally involved in the project. This means you can talk directly to the developer working on your software and avoid the usual miscommunication that can happen when information travels through the hands and keyboards of multiple people.

Do you use project management software like, e.g. Jira?

Yes, we communicate using Slack and Jira and try not to use email too much. We’re also open to adjusting to the tools your company uses.

Are you a stable company?

Oh, we are. In the past 19 years, we’ve completed over 200 projects and have a full-time in-house team of about 30 people. We’re also the founding members of sodapl.com – the Polish Software Development Association. Go to https://clutch.co/profile/desmart to read what our current and past clients have said about working with us.

Why would I want to work with you?

We’re a boutique software house hiring a maximum of 30 people. Among other things, this means that your project is always a priority for us – we just can’t take on too many projects at a time. We’re also super honest and transparent and will always give you a clear picture of what’s going on.

Our team includes experts with many years of experience, and we’re often asked by other software houses to support them with their projects.

We also have a unique company culture. We’re teal-oriented and value a human approach to software development (which is why “Human-first software development” is our tagline) and work in general. And you can see it both in how we run the company and the way we work with our clients.

Who can I talk to about an upcoming project?

Set up call with Bartosz Drzewiński - here's his calendar.

Contact us

Now let’s talk

about you