Web Application Development Agency London
READY TO LAUNCH YOUR WEB APP IDEA?
We have over 24 years of web application wisdom, ensuring we rapidly design and develop you a powerful, engaging and intuitive custom web application that meets your exact requirements.
Got a project in mind? Connect with us today.
Contra delivered a really creative and practical solution that hit our brief, budget and tight deadline. With great feedback from visitors and over 450,000 video views, we were really happy with the results.
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Web application development services.
Connect with us.Custom web app development.
Ensure your web app is built for your users with bespoke web app development. Our approach blends user-centred design with technical excellence to craft award-winning web applications. Our team of experts code in multiple languages and frameworks, ensuring rapid, seamless loading of your sites.
Web app prototypes.
Once we've completed the discovery and research stage together, we employ cutting-edge design software to produce a clickable prototype of your web app. We follow this with rigorous testing, involving your end-users, to detect and rectify any potential issues before our development team begins coding.
Web app game development.
From chocolatey challenges for Cadbury’s, to epic viral quizzes for the launch of Final Fantasy, right up to crucial crowdfunding platforms for Square Enix, it’s a no contest when it comes to Contra’s web app games development.
Law firm web app development.
We speak to law firms just like yours on a daily basis and understand their unique challenges. We develop a range of secure web apps for the legal sector, including secure client portals, debt recovery payment portals, and management systems. We’ve also integrated with CRMs and other systems.
Education sector web app development.
As an experienced web app development agency in the education sector, our portfolio includes private social networks for parents, virtual learning environments, mobile apps, and health & wellbeing support platforms for students. We're dedicated to transforming education through innovative solutions.
Consultancy firm web app development.
Working with ‘Big 4’ consultancies, we’ve supported their marketing and HR teams through bespoke event management systems, bespoke webcast and video on-demand apps, and custom management tools.
Charity web app development.
Donor platforms, volunteer management systems and impact reporting dashboards – we love helping charities maximise engagement and increase donations.
Science & Research web app development.
From immersive virtual environments for flagship science events, to data repositories for storing and sharing research data and findings, we’ve helped some of the most established Science & Research organisations increase engagement.
Cutting-edge technologies.
Our dynamic team continually embraces the latest technologies to stay ahead. Our devs utilise various languages and frameworks such as Node, PHP, .Net, JavaScript, Typescript, React, Vue, Lambda, Azure Functions, SQL Server, MySql, MongoDB, CosmoDB, DynamoDB, Firebase and more to craft high-performing web apps.

Got a project in mind?
Reach out to our web app development agency experts. We bring your vision to life. Request a callback now.
How we deliver web app development.
Connect with us.Step 1.
30-minute connect call.
We start by getting to know you, your company and your web app requirements on a free 30-minute connect call.
Step 2.
Get your web app proposal.
If we feel there’s scope for us to work together, we’ll send across your web application proposal, outlining the budget, addressing any key questions, and breaking the process down into key stages.
Step 3.
Discovery workshops.
The project begins with a structured session to define app objectives, streamline functionality, and address potential issues. Following this, we'll identify user types and create personas, understanding their goals and usage scenarios. With user personas in hand, we'll develop 'user stories' for each feature, addressing technological approaches and challenges.
Step 4.
Design and prototype.
In the design phase, we prioritise UX design, ensuring a smooth interface built around your users’ needs. We'll provide wireframes, designs, and a style guide for developers. We also ensure branding aligns with your main brand. We then create a fully clickable and testable prototype.
Step 5.
Build sprints.
We utilise Agile development, as used by tech leaders like Google and Microsoft. Agile involves two-week 'sprints,' prioritising user-centric 'stories' for quick progress and feedback. This approach enables rapid adaptation to changing project needs
Step 6.
Quality assurance.
Our application code adheres to best practices, emphasising reliability and reusability. We prioritise robustness through systematic processes, including source control, Test Driven Development (TDD), Continuous Integration (CI), and Continuous Deployment. This ensures a rapid, automated workflow with comprehensive testing. Our software meets the rigours of some of the most demanding compliance teams in the world.
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Frequently asked questions
- What is your project management process?
Your web app development project will begin with a kick off call where we’ll establish roles and responsibilities, utilising Gantt charts to ensure everyone involved is aware of the expectations on how long each stage should take. You will be assigned a dedicated project manager who will remain in regular contact, as well as being able to request access to our project management tool where you can leave comments and offer your own insight.
We also take an “agile” approach to any web app development project. This involves using an ‘Agile Development’ methodology, whereby the add the app steadily evolves in over several two-week sprints. Each sprint consists of different site features, known as ‘stories’, and each story is given priority depending on its value and importance. You will receive a demo of the end of each sprint, giving us the chance to report progress and gather feedback. Such an approach allows us to rapidly prototype and adjust to any changes in the brief as we go.- How will we communicate during the project, and how often will updates be provided?
Regular catch-up meetings can be arranged with your project manager and the core team members working on your web app. You also have the freedom to reach out to your project manager with any queries you might have throughout the process, and can utlisies Contra’s urgent email if you have an important request that must be handled imminently.
- How do you approach the design and user experience (UX) aspects of web app development?
Contra’s experienced designers will use a collaborative tool called Figma to create a prototype of your web app, providing a clear picture of the design, layout, and functionality. The prototype will be user tested throughout, helping to identify areas that require alterations and optimisations to provide the best experience possible when it comes to launch. Prototyping will be carried out in line with the Agile Methodology, allowing us to efficiently implement any changes.
- What is your process for testing and quality assurance?
There’s no point spending valuable time and resources developing a web app if you don’t test it until the latter stages only to realise it requires significant changes. That’s why we embed testing and quality assurance throughout the development process, ensuring that everything is to your taste and functioning as it should be before we move on to the next stage.
- How do you handle bug fixes and post-launch support?
Depending on your requirements, we can offer a variety of support retainers whereby we monitor the performance of your web app, carry out regular security updates to ensure your users stay protected and, remain on hand to resolve any bugs.
We also understand that your web app needs to evolve and adapt as demand for your services grows. That’s why our developers are always available post-launch to add new capabilities that meet your changing needs.