Web Application Development Company

Web application development services using industry leading technologies.

At 540 Interactive we build adaptable cloud-based web applications and portal solutions to power end users with thought-out UX and compelling features. With our domain expertise we have created world class B2B and B2C web applications for several industries. ||web-based software developer Greenwich||

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Custom Web Application Development Agency

540 has developed custom web application software for startups, international corporations, schools, municipalities as well as extensions to existing websites and eCommerce systems.  Our software solutions are deployed across secure cloud hosting platforms optimized for speed and security. Best of all our application are built on responsive frameworks so you can access core functions not only from your desktop browser but tablets and smart phones as well.  

With end-to-end web application development, we provide services to emerging businesses & individuals. We develop HTML/JAVAScript applications that are well-tested across desktops, smartphones, and tablets. Our aim is to deliver functional, convenient, and compelling applications while giving responsive outcomes. 

If you are running a legacy web application that needs enhancements we always looks for the opportunity to redesign the outdated & unfriendly web interfaces. We reconsider old apps and make suitable amendments to match the latest UX/UI.  

Front-End Development

We develop with reusable, dynamic, and component driven architectures such as React.js, Angular.js, Vue.js to deliver cutting-edge web applications.  

Back-End Development

We engineer robust backend utilizing Node, ROR, Python & Laravel that are capable of complex computations and scalability for your business.  

SaaS Application Development

Create viable, secure and robust SaaS solutions that you can white label and remarked as subscription based services.  

eCommerce Development

Kick start your business or scale future growth with an eCommerce web application to manage products, inventory and reporting that pushes updates to your website, POS and mobile apps.  

Web App Development

Industry Leading Solutions


Product customizers, inventory tracking, auctions, make-an-offer.

Health & Medical

Interactive vitals charting, secure document transfer.

Fast Casual

Product builders, loyalty programs, geolocation pick-up and delivery.

Delivery Management

Driver routing, real-time mapping, geo location notifications.


Distance learning, teacher messaging, online quizzes, parent portals.


Mobile banking, investing & payment gateways.

Web App Development Showcase

Kurin Blood CultureData Analytics + Machine Learning Web Application
WealthDriveFintech Web Application with Lead & Client Management, Calendar, Call Center & Portfolio Management
The Final-FinalCloud Based Logistics Software Application
SEBASS EventsEvent Management Cloud Based Software Application
Cos Cob Fire Police PatrolFirehouse Call Manager, Training Center & Reporting Web Application
Building BlocksSchool Management & Parent Portal with Notification System

Additional Services

Mobile App Development

We develop native mobile applications for iOS & Android as well as hybrid apps to produce stunning mobile platforms for your customers and increase ROI. We work on transforming your idea into an innovative and secure mobile application.

Website Development

Website design, development and ongoing support from small start-ups to full-scale eCommerce. We align your business goals with modern tech to produce cutting-edge experiences that are recognized, trusted and optimized for search.

Let's Get Started

Have a project or partnership in mind? Contact us today for a free consultation.