Best Practices for Building High Performance & Scalable Web Applications

Let’s say you’ve created a web application and are beginning to attract some users. You’re ready with a product that people want after receiving some feedback and making some iterations. Your application is now attracting interest from an increasing number of users and making an increasing number of requests each minute (RPM). Your program is suddenly used by many new users, who eventually encounter technical difficulties. You discover that your software functions as intended when testing it. So what took place? You only have a scalability issue. Most likely, your cloud architecture was not intended to scale as the load increased.

Scalability is crucial for modern online applications. A successful online application must function properly and be scalable, able to accommodate an increase in users and load without causing service interruptions (and then deliver a great experience to users, no matter how many they are).

Why is scalability important?

People today demand their data instantly, immediately. The idea of waiting for a web page to load, an image to upload, or a form to process does not exist. Your application will inevitably fall behind if it isn’t well-designed and unable to accommodate more users and workload. Any web application must be scalable to survive; otherwise, it will stop working. Most modern web and app development companies fall short of comprehending scalability and knowing how to apply the principles and standards from design through implementation.

Best Practices for Building High Performance & Scalable Web Applications

Responsiveness and fast load time

Applications that users interact with should have less latency. It’s crucial to keep in mind that different programs may have varying demands and user expectations for responsiveness and loading speed. For instance, compared to an internal B2E portal that staff members will use regardless of latency, a high-load web application for photo and image editing has a far lower tolerance for it. These are some of the primary features that identify a scalable application recommended by website application development companies. However, they are by no means all present. In truth, scalability will be defined differently in each situation depending on the growth and difficulties that systems must face.

Vertical & horizontal scaling

Vertical scaling implies an improvement in the performance of each system component. Scalability in this context refers to the capacity to swap out existing computer system parts for more potent and quick ones as needs change and technology advances. Since it doesn’t call for any modifications to the application programs operating on such systems, it is the simplest scaling approach.

When a system is horizontally scaled, it is broken up into smaller structural components, distributed over several physical machines, and multiplied by more servers, each of which performs the same task. Scalability in this context refers to expanding the system’s nodes, servers, and processors to boost overall performance. The programs may need to be modified for this scaling technique to properly utilize the added resources.

Adopt multi-tier architecture

Web applications are separated into tiers in multi-tier software architectures. The web server, application server, and database server are a few examples of these levels. It is simple to scale apps because each of these tiers operates independently on various servers and hardware. With multi-tier software, we can alter the hardware or server setup of one tier without having an impact on the performance of the other tiers. We only make the adjustments to the tier that is affected, making this a cost-effective choice. If our architecture were single-tiered, we would have to completely redesign the application in order to achieve our scalability objectives.

Also Read: benefits of web applications

Deploy PaaS solution

A Platform as a Service (PaaS) solution can assist you in fast enhancing the performance and scalability of your application because performance will mostly depend on the deployment of your infrastructure. Additionally, some platforms permit the addition of elements like experimentation with experience and architectural design. Analyzing user experience, product deployment, and measurable impact across your technology stack is achievable with a digital experience platform (DXP). You simply need to provide application code and existing data when using a PaaS solution, and you can set up an SLA for availability and dependability that includes automatic scaling.

TDD – Test-driven development

TDD is a technique for application development where test cases are created from your program requirements. This strategy is appropriate for scalable development since you already have test cases from the scalability problems you identified using measurements.

Best security approach

Although there is no way to ensure total security due to the possibility of unforeseen events, there are steps you can take to lessen the likelihood of experiencing web application security issues. A strong firewall is the first line of defense against hackers. To prevent anyone from your firm from accessing the application, a firewall is employed. Another crucial security measure is configuring the user directory so that your application may instantly check for and update the user’s information. Adding authentication to your application is another crucial component. To limit application access to authenticated users exclusively, use role management with authentication.


Large projects with a lot of work demand specific skills and knowledge. Before beginning the design process, a project’s scale must be taken into account. In the long run, this will save both time and money. Scaling can be done in a variety of ways, including front-end, back-end, and database. They offer the chance to create a system that will function with hundreds of millions of users each month. You must create the appropriate architecture and use dependable servers in order to achieve a high-quality outcome. We advise using the Amazon Elastic Compute Cloud for scalable projects (Amazon EC2). Trust only reputable website application development companies.

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