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Web App Development Company
Intelivita is a web application development agency that designs and develops custom web applications, progressive web apps (PWAs) and digital platforms.
We build eCommerce platforms, online marketplaces, SaaS products and internal business systems.
Trusted by leading organisations and growing UK businesses
Strategy
UI/UX Design
Development
Testing
Launch
Support
Growth
What web application development services do we offer?
Intelivita provides web application development services for new products, existing applications and ongoing development, covering custom builds, PWAs, MVPs, bespoke CMS development, modernisation and post-launch support.
Custom Web Application Development
Custom Workflows • User Roles • System Integrations
We develop custom web applications when standard software does not provide the features, workflows or integrations your business needs. Project scope defines the required features, including user roles, dashboards, approval flows, data management and system integrations.
Progressive Web Application (PWA) Development
Browser Installation • Offline Access • Cross-Device Use
We build progressive web applications that users can install from supported browsers and access across desktop and mobile devices. PWA development can include offline functionality, responsive interfaces and device features supported by the browser, without maintaining a separate native application for each platform.
MVP Web Application Development
Core Features • User Testing • Iterative Development
We build the first usable version of a web application with the core features needed for real users to test the product. The MVP includea the main user journey, account access, data storage, admin controls, payments and essential integrations. Feedback and usage data from the first release help decide which features to improve, add or remove in the next development stage.
Bespoke CMS Development
Role-Based Access • Publishing Workflows • Media Libraries
We build custom CMS platforms that let your team add, edit, publish and manage content or data without changing application code. The same CMS can support web and mobile applications and control what different users see based on roles, accounts or permissions.
Web Application Modernisation & Migration
Framework Upgrades • Code Refactoring • Cloud Migration
We modernise older web applications by upgrading frameworks, refactoring outdated code, improving architecture and updating databases or integrations. We migrate applications to newer technology stacks, cloud infrastructure or a new hosting environment where required.
API Development & Integration
API Authentication • Data Mapping • Third-Party Integrations
We build and integrate APIs that connect web applications with internal systems and third-party services. This can include payment gateways, analytics platforms, CRM systems, shipping services and custom API connectors. We handle authentication, endpoints, data mapping and error handling so the connected systems exchange the data required by the application.
Web Application Support & Maintenance
Bug Fixes • Framework Updates • Uptime Monitoring
We provide ongoing support and maintenance for web applications built by Intelivita or developed elsewhere. This includes bug fixes, framework and dependency updates, database maintenance, monitoring, performance improvements and small ongoing changes.
Enterprise Web Application Development
User Permissions • Approval Workflows • System Integrations
We build web applications that support multiple users, roles, permissions, workflows and connected business systems. Development can include dashboards, approval processes, reporting, data access controls and integrations with existing CRM, ERP or internal software.
Types of web applications we build
These applications support online transactions, subscriptions, self-service, bookings, workflows, reporting and browser access alongside mobile apps.
Intelivita builds web applications for customer-facing products and internal business operations.
eCommerce Platforms
PRODUCTS · INVENTORY · ORDERS · PAYMENTS
Marketplace Platforms
BUYERS & SELLERS · LISTINGS · TRANSACTIONS
SaaS Platforms
SUBSCRIPTIONS · USER ACCOUNTS · MULTI-TENANT SYSTEMS
Internal Business Systems
WORKFLOWS · USER ROLES · DATA MANAGEMENT
Customer Portals
ACCOUNTS · DOCUMENTS · SELF-SERVICE
Booking & Scheduling Applications
BOOKINGS · AVAILABILITY · PAYMENTS
Dashboards & Reporting Applications
REPORTING · DATA VISUALISATION · PERFORMANCE TRACKING
Web Platforms Complementing Mobile Apps
We build web versions of mobile app platforms so users can access the same product through a browser as well as a mobile app. Both platforms can use the same backend, data and business logic while giving users more choice in how they access the service.
Web applications we’ve designed and developed
Explore web applications Intelivita has designed and developed. Each case study shows what the product does, the development work completed and the functionality delivered.
Sports
Putting expert pickleball coaching in every player's pocket
Mobile Apps · Web Apps · Coach Platform · UI/UX
MANUFACTURING
Building a Product-Led Website for a US Rubber Manufacturer
Web Design · Web Development · UI/UX · SEO
42% Higher eCommerce Conversions | RUBBER XPERTS INC
What are the benefits of web application development?
Web applications give users browser-based access across desktop and mobile devices without requiring distribution through an app store. They also support data-heavy interfaces, internal business systems and complex workflows that benefit from larger screens.
Better for Data-Heavy Platforms
Web apps work well for platforms with large amounts of information, detailed workflows or complex interfaces, especially on desktop and laptop screens.
Ideal for Internal Business Systems
Web apps suit back-office teams and internal users who need to manage business processes, data and workflows from a larger screen.
Faster Access Without App Store Approval
Web apps can be published directly without Apple App Store or Google Play approval, giving users immediate access through a browser.
Lower User Friction
Users can access a web app without installing anything first. Offering web access alongside mobile apps can also make onboarding easier.
Better for Complex Interfaces
Dashboards, tables, reporting tools, editing systems and multi-step workflows often benefit from the additional screen space available on web apps.
What is the web app development process at Intelivita?
We follow a five-stage web application development process, from defining the first release to deployment and post-launch maintenance.
01
Define the Scope & First Release
We understand your requirements, target users and features, recommend the right technology stack, and agree on the scope, fixed cost and delivery timeline.
02
Web application design: UX and UI
We design the web application experience across desktop, laptop and mobile browsers, ensuring responsive and adaptive layouts. Where required, we create mobile-specific designs.
03
Web application development
We develop the application in regular sprints and share functional builds, typically each week, so you can review progress and provide feedback throughout development.
04
Testing & Quality Assurance
We test throughout development, including functional, regression and security testing. We also test across different screen sizes and resolutions to ensure consistent performance, usability and responsiveness.
05
Deployment & Maintenance
We deploy the web application to the agreed cloud infrastructure and configure the production environment. After launch, we can continue hosting, monitoring, maintaining and developing the platform.
Technology stack for web application development
The technology stack is selected based on the application's frontend and backend requirements, integrations, data needs, expected usage and deployment environment.
Web & Frontend
- REACT
- NEXT.JS
- ANGULAR
- HTML5
- CSS3
- JAVASCRIPT
- TYPESCRIPT
Backend, APIs & Data
- NODE.JS
- PHP
- LARAVEL
- .NET
- JAVA
- PYTHON
- GO
- REST APIs
- GRAPHQL
- SOCKET.IO
Databases & Backend Services
- MySQL
- POSTGRESQL
- MONGODB
- FIREBASE
Notifications & Real-Time Updates
- Firebase Cloud Messaging
- Socket.IO
Cloud & DevOps
- AWS
- AZURE
- GOOGLE CLOUD
- DOCKER
- CI/CD
Payments
- STRIPE
- PAYPAL
- WORLDPLAY
- KLARNA
- APPLE PAY
- GOOGLE PAY
Progressive Web Apps
- FLUTTER
Why work with Intelivita for web application development?
Our web application projects are handled by design, development, QA and infrastructure specialists through a defined process from planning to post-launch support.
13+ Years of Web Application Development Experience
13+ Years of Web Application Development Experience
Intelivita has more than 13 years of experience building web applications across different industries and levels of complexity.
Experience Across a Wide Range of Web Applications
Experience Across a Wide Range of Web Applications
We have built web applications for eCommerce, marketplaces, real estate, internal business systems, health and science, SaaS products, admin platforms and web experiences that complement mobile apps.
In-House Design & Development Team
In-House Design & Development Team
Our in-house team includes UI/UX designers, frontend and backend developers, QA engineers and cloud infrastructure specialists who work across design, development, testing and deployment.
Full-Cycle Web Application Development
Full-Cycle Web Application Development
We manage the full journey from scope and UI/UX design through development, testing, deployment and post-launch support.
What our clients say
“What stood out most about Intelivita was their ability to operate as a true delivery partner rather than just a development vendor. They combined strategic input with hands-on execution, helping shape the product while also building it.”
“Intelivita has developed an app that can dynamically display research questions and support a participant through all stages of their research journey.”
“What stood out most about Intelivita was the balance between professionalism and personal approach, which made the entire development process both efficient and enjoyable.”
Ready to build or improve your web application?
Tell us about your idea, existing web application or next development phase. We’ll review your goals, users and essential features, then outline a practical scope, development approach, timeline and estimated cost — with no obligation to proceed.
Web application development FAQs
What is a web application?
What is a web application?
A web application is an application that operates through a web browser rather than requiring installation on a device. It allows users to interact with the platform in a similar way to a native app, while accessing it directly through the web.
What is the difference between a website and a web application?
What is the difference between a website and a web application?
A website mainly presents pages and information for users to read or browse. The content is generally informative and does not change significantly based on individual user actions.
A web application is interactive and responds to user input. It can display dynamic information, manage user-specific data, support different workflows and change what users see or can do based on their actions, account or permissions.
Can Intelivita Take Over an Existing Web Application?
Can Intelivita Take Over an Existing Web Application?
Yes. We review the existing codebase, framework, database, integrations and deployment setup before agreeing the maintenance, modernisation or further-development scope.
How much does it cost to build a web application?
How much does it cost to build a web application?
The cost to build a web application ranges from £7,000 to £150,000+, depending on complexity, features, design requirements, and the development team's location. Basic web apps with limited functionality cost less, while enterprise-level applications with custom features, integrations, and advanced security charge high.
How long does it take to launch a web application?
How long does it take to launch a web application?
A web application takes 8 to 20 weeks to design, develop, test, and deploy, depending on its complexity and feature set. Projects with custom functionality, third-party integrations, and compliance requirements take longer due to extended development and review cycles.
Can a web application scale as the business grows?
Can a web application scale as the business grows?
Yes. We design web applications with future growth in mind, so the platform can support more users, additional features, new integrations and changing business requirements over time.
Scalability also means making future development easier. The way the codebase, backend, database, hosting environment and individual features are structured from the start can make it easier to add new functionality without creating unnecessary complexity as the product grows.
Scalability also means making future development easier. The way the codebase, backend, database, hosting environment and individual features are structured from the start can make it easier to add new functionality without creating unnecessary complexity as the product grows.