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Custom Web App Development Services

Our flexible, out-of-the-box developers can create solutions that are not only tailored to your needs, but which also integrate seamlessly with your existing internal systems.

Project approaches



Our team can develop the front end user interface of your website or web app and integrate it with your existing backend and API.

Front-end + Backend

Front-end + Backend

When you need to develop a backend solution to support your mobile app, our backend engineering team is ready to help.

Admin Panel

Admin Panel

We design and develop easy-to-use admin panels for mobile and web apps, using popular UI solutions that are reliable and easy to support and extend.

Project Stages and Flow

Depending on your current project stage Diffco can work-out and suggest the most effective plan to achieve your goals, and launch or release a new version that your users will love.

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Discovery stage

To plan and run your project efficiently, we start with discovery. In this four-step stage, we collaborate with you to align functionality, prioritize business goals, coordinate strategy, and prototype future products. During discovery, we also define your deadlines and budget.


Design stage

After developing a prototype wireframe, our design team starts to create your application style (the app’s “look and feel”). In this stage, we provide you with a full set of UI screens to use for further development.


Development stage

Product development typically evolves across multiple releases, including a minimum viable product (MVP) for the earliest possible release. To speed the process, we use Agile methodology with short sprints, and we run the development stage in parallel with design wireframes, documentation, and mockups.


Ongoing Development, Support,
and Maintenance Stage

After releasing the MVP, our team performs new sprints to speed new releases with additional functionality. And we support and maintain the latest version of the launched app.

Development formats and billing

Time & Materials

The best software requires flexible thinking, tweaks to requirements, and shifts in scope. With the T&M approach, you won't overpay for risk contingencies that you probably won’t need.
Read our blog for a full analysis

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Time & Materials


Agile software development involves a series of short sprints to ensure rapid, transparent progress toward your product goals. We apply this nimble, responsive approach to incorporate your feedback, adjust priorities as needed, and ensure your approval at every step. We use the Agile best practice because it is more flexible—and less risky—than the linear Waterfall development methodology.

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What Is Custom
Web App Development?

Diffco’s custom web app development services includes uniquely designed web apps custom-made to meet both your current and projected future needs. Through the power of custom web development, our team of experts will plan, create, test, and launch new apps made just for you.

Pulling this off will take everyone working together: a team of front-end, back-end, and full-stack developers, business analysts, and quality assurance testers.

UI/UX Designers

A great web app starts with great user interface and experience. Because this is the part of the app your users will interact with, UI/UX designers pay attention to matters such as the site’s appearance (colors, fonts, logos, buttons, layout, graphics), content (text, copy), navigation (menus, links), and user experience (usability, intuitiveness).

Front-end Developers

Front-end developers are responsible for the outward-facing look and feel of your custom web applications. They create a web service that is both attractive and easy to use for customers and clients.

Our front-end developers are skilled in JavaScript and TypeScript, and well-versed in frameworks and front-end architecture and coding standards. With their knowledge and experience—and savvy application of responsive web design technologies—they can ensure that your web app solutions look good and are a pleasure to navigate no matter what device your users prefer (desktop, laptop, tablet, phone).

Back-end Developers

Anyone who lives in a house or apartment building knows that there’s more to the structure than meets the eye. While the walls, windows, and roof are what we first see, they don’t hold themselves up. There’s a lot going on under the surface to hold the entire structure together. The back end of a custom web application needs a solid infrastructure and well-crafted application holding it together behind the scenes.

Back-end developers are responsible for building the structures that will make your outward-facing website (and its functions) possible. These include:

  • Software codes
  • Servers infrastructure
  • Databases
  • Application Programming Interfaces (API’s)
  • CI/CD pipelines

Back-end developers are experienced in popular backend languages (such as PHP, Node.js, and Python) and in the principles and architectures of building backend software. With their skills, our back-end developers ensure that all systems the front-end developers have created are properly supported and are integrated with all your internal systems and programs.

Full-Stack Developers

As their title indicates, full-stack developers are comfortable with the intricacies of both front-end and back-end development. These cross-disciplinary developers can move comfortably from working on client-facing applications to server-facing integrations, plus everything in between.

Full-stack developers use most existing front-end and back-end languages and can therefore work on the UI and back-end functionality of the site at any level. They may float between back-end and front-end teams to fill in as needed during development. They can mediate backend and frontend teams, integrating designing and implementing the most effective integration between the two sides. Full-stack developers have the knowledge and expertise to follow the entire flow of the user experience and track any potential problems back to their source, solving them quickly and efficiently.

Our Approach to Custom
Web Application Development

Get Started with Enterprise Applications Development and Diffco

We are ready to help to design your own custom web applications and level up. We create flexible, strategic solutions that keep you on the cusp of growth and innovation in your market. Based in Silicon Valley, Diffco team operates worldwide. From the heart of the world's high-tech center, we bring the latest trends and the best technologies for your business’ success.


What is custom web app development?

Custom web app development is the art and science of building phenomenal applications for users to access via the web. Unlike mobile apps, web apps can be leveraged via a range of browsers built into a desktop, laptop, mobile, tablet, or another internet-connected device. These apps can sometimes also integrate with a variety of other tools accessed by end-users, such as CRMs or collaboration tools.

With custom web app development, the technology is built according to the specific needs of the company and their target audience. Here at Diffco, we use an extensive discovery process to learn everything there is to know about your audience, customer pain points, and business goals, to develop an app from scratch that’s functional, secure, and reliable.

How much does it cost to create a custom web app?

Custom web app development services are highly diverse and versatile solutions. The scope of your project will often determine the price you pay to have your technology developed. The more complex the app, the more you may need to pay to access specific tools and expertise.

Diffco uses a transparent pricing model which focuses on the cost of time and materials for each unique project. Our team devises a strategy to fit each individual client’s budget and to position them for growth. This means clients receive a bespoke quote for their project, according to the specific resources they need to access, and the time the app takes to build. This way, you have the complete freedom to adapt your project to suit your needs, without paying more than necessary.

How long does custom web application development take?

When it comes to custom web apps, the project length depends on many factors. In our strategy discussion, our team will review the complexity of your company’s project, the scope of functionality, and budget. Some web apps can be designed in a matter of weeks, while others take several months. Diffco is flexible and can work according to your individual needs and terms. For some companies, we may suggest various approaches that allow launching MVP faster and having an ongoing development plan. The key to successful custom software development is an agile approach, which allows you to rapidly create a minimum viable product (MVP) for release.

Diffco’s lean and agile approach to development ensures we can rapidly build applications according to your expectations and goals quickly, while taking your feedback into account every step of the way. Our nimble and responsive workflows ensure we can incorporate your insights into our processes, and deliver results as quickly as possible.

Let’s build something
great together

We believe in turning ideas into reality and we're ready to join your journey. Reach out to us and let's start discussing your project.

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