Application Development

Custom web applications that streamline your business processes.

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Is your business using the right solution?

Not only can we scope and build your project, but we have the technical power to maintain and scale it as your company grows. Our development team has years of experience with custom PHP/MySQL development, iOS/Android App creation, and custom WordPress sites. As part of our process, we use Agile techniques to ensure projects stay on-time, on-budget, and flexible as requirements change.

We focus on building the right solution for your business. Then, we optimize for functionality and scalability while providing dedicated support throughout our partnership.

Our Approach

Streamline Business Processes

Development projects are all about streamlining processes. We make your application quicker, more reliable, and easier to validate.


It doesn’t just need to look great — it needs to function well, too. We develop an intuitive workflow for your website or application.

Dedicated Support

Our support team operates on a customer-first mentality, offering quick response and issue resolution while providing actionable feedback.

Optimized for Speed and Security

Access to your online data needs to be fast and safe. We optimize your website or application for speed and security to provide an excellent user experience.

Infinitely Scalable Platform

Scalability is crucial for a growing business. We build web applications that are scalable and able to grow with your company.


"We appreciate everything Design Extensions does for us. They keep us out in the forefront of our space."


Our Process


Meet with Us


Finalize Project Scope


Build Your Application


Provide Ongoing Maintenance
App Development in Jacksonville & St. Augustine, FL
Got an idea for an app? We have the technical power to build a streamlined application that’s fast, secure and infinitely scalable. Our development services also involve keeping websites and applications well-maintained, and we offer full support you when issues arise. Design Extensions provides custom web solutions for businesses that want to optimize their processes and offer employees and customers alike an optimized experience. Whether you need quality web applications, mobile apps, maintenance or support services, DE can handle all your development needs.

get results like these.

Turn to the team at Design Extensions when you need development services in Jacksonville and St. Augustine, FL.