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Web presence is the number one requirement for any software product. The wide variety of tools and advancing new frameworks moved custom web app development to the next level and made it as accessible as never before. Innovative approaches are getting popular at full speed. Both businesses and developers could benefit from fast, simple and efficient coding process and maintenance. In this article, we will wrap up the most important details on custom web app development, including its architecture, available technologies, SDLC models and best practices in 2020.

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The last decade has presented a number of technological opportunities in the software building process. A variety of tools and frameworks are changing the existing approaches irrevocably. Custom web app development is being advanced and supported by different businesses and developers themselves. According to the statistics, the average organization is using approximately 29 different web applications during the common daily process.

reasons to choose the cloud applications

Companies have named the top 5 reasons to choose cloud solutions: speed improvements, flexibility, business continuity, customer support, and lower cost. Source:

The fast-growing network dev communities work on both enhancing existing approaches and developing new ones. Instead of creating and supporting separate versions like a desktop app, iOS and Android mobile apps, businesses can invest in the cloud solution with responsive design. It is less resource-consuming since the web app development process can be much faster and easier. Consequently, only the U.S. market predicts the 26 percent increase in the number of web developers between 2018 and 2028.  

Such huge companies as Alphabet, Facebook, Dropbox, Hubspot, Amazon were among the first to deliver custom web app development services. They have greatly benefited from the boosted performance and provided excellent user experience for their customers. 

It also enables automated data exchange and process integration across different ecosystems. Custom web application developers work on continuous functionality extension prioritizing business requirements. 

Better user experience, the cost decrease, reasonable timeframes will become beneficial for everyone. Companies that have the software product can advance it with the help of the cloud version and so can do new businesses. Custom web app development is the best choice so far. In both cases, it aims at providing the best functionality with an eye to the future. Let’s consider the most common requirements during the coding process.


Choosing the right cloud app architecture is an essential step in the overall web app development process. It maintains the necessary communications between the user interface and structural components. The cloud app architecture diagram reflects the major interactions within the network software. In short, the entire process starts with the user command sent to the online server via the Internet. It will forward the request to the required server which can process it. The following step is that the cloud app passes the processed data to the server that presents obtained results to the user.

reasons to choose the cloud applications

In order to make the web app development process smoother and faster, developers have applied the various types of cloud app architecture. Web app specialists always balance between the innovative approaches and reasonable solutions for the project needs. Their task is to build an appropriate cloud app architecture that enables continual and fast interactions between all the components. Here are some of the common approaches.

Server-side HTML cloud app architecture

It is one of the oldest approaches where the server generates HTML content and sends it to one URL as a full-fledged page. As for advantages, such architecture patterns can be applied to different server languages and frameworks. There isn’t any need for additional security tools as it is usually provided by the server side. However, the approach is limited and can’t provide high performance and great usability. Streaming a huge amount of data between the server and the user usually takes some time. Moreover, there aren’t any abilities for real-time updates and offline work that is only supported by HTML5.

JS generation widgets(AJAX)

The main advantage is that the displayed page will consist of widgets. The requested data is uploaded by means of AJAX query, JSON,  HTML chunks, or JavaScript templates. All the widgets function separately and particular changes won’t influence the whole page, which makes the whole custom web app development process much easier. It decreases the response time and improves usability as the data is being transferred only to a specific widget. Developers usually need to apply additional mechanisms like Hash-Bang for linkability, server-side technologies in web service, and JavaScript frameworks on the user side.

Single page application

That is a dynamic approach that enables smooth, fast and real-time interactions in the cloud app architecture. Updates occur within the existing page with no need for the whole page loading. Users can interact with the particular page while the requested content is generated. Such pattern delivers the page communication via AJAX, XML, Asynchronous JavaScript, JSON or HTML elements. The applied pattern has greatly improved the user experience and allows page adjustments without reloading. Therefore, this pattern is widely chosen for increased usability and performance.

In any case, we have to acknowledge that choosing up-to-date cloud app architecture will result in better performance, great scalability and fast delivery. Therefore, the single page app is considered the most innovative and efficient approach. We also suggest reading the article about web application architecture covering details on cloud app and web server architecture. Combining different approaches and varying web server architecture structures will help to improve the overall response to user requests.


The next step to consider is the choice of server-side technologies that can be used by the programmers in order to deliver the best web app development services. According to statistics, most market share belongs to PHP, Node.js, ASP.NET, Java, and Ruby on Rails. Depending on the final decision, companies have the possibility to improve such important criteria in custom web app development as scalability, security, maintainability, project cost, etc. Therefore, we’ve prepared some important details on each of these technologies.

server-side technologies for web app development

Server-side technologies market share. Source:


PHP is an open-source programming language that has existed for more than 25 years and has a supportive community of over 5 million developers. Developers acknowledge that this language is compatible with various servers and suitable for most cloud apps. As they apply the interpreted code, it might lead to slower performance when dealing with heavy files. However, this language is known for its great horizontal scalability that distributes the workload between servers. As for security, the developers have to consider more approaches in addition to just in-build security features. In short, this is a flexible programming language that can meet the basic needs of custom web software development. Companies favor it for the ability to choose between hosting services, lower maintenance expenses, and developers’ availability.


ASP.NET is a network application framework that is greatly supported by Microsoft. It entered the market in the 2000s but today’s community already consists of 60.000 developers. ASP.NET web software development is characterized by all the necessary functionality: fast performance due to the compiled code, vertical scalability, support for all authentication protocols, numerous libraries. This framework turned out to become the most reasonable and up-to-date solution for custom web app development. It offers the greatest functionality and the least expenses in regards to the infrastructure.


Node.js is an asynchronous event-driven JavaScript runtime built on Chrome’s V8 JavaScript engine that was released in 2009. This is the latest technology that advances the event model further with a non-blocking I/O approach. Such an approach makes it efficient and lightweight. It aims at consistency, flexibility, and of course reliability. Node.js is a great choice for user-friendly and robust cloud apps. The architecture supports code sharing and reusability similarly to the Java-based approach. 

Ruby on Rails

RoR is an open-source website framework that obtains powerful and rich APIs. It targets simple development with more productivity. The initial release was in 2005 and today’s community numbers 1.9 million specialists worldwide. It is often used to build scalable web applications as developers apply the interpreted code with no need for compilation. It is often used to build scalable network apps. The overall custom web app development process isn’t that time consuming as it requires less coding and testing. The main advantage of Ruby on Rails is that developers should favor convention over configuration.


Java is an object-oriented programming language that has been on the market for more than two decades. Its community has grown to a number of 7.6 million developers. This language is easy to learn and the development process is supported by different Java IDEs like Eclipse, NetBeans, IntelliJ IDEA, etc. It’s common for developers to vary tools and frameworks for the layered architecture. Since Java code is backward compatible and runs inside a web container on the server, it could be simply migrated between different operating systems. However, security remains the main concern for Java developers. Being one of the first server-side technologies, it’s getting harder to compete with the new market players.

Along with considering the mentioned criteria, companies usually draw attention to innovative technologies in custom web application development. Their choice is driven by the framework stability and community support. We’d like to emphasize the fact that the market demand for ASP.NET and Node.js has constantly increased in a short period. Up-to-date functionality at a reasonable cost is among the main reasons to choose these server-side technologies. Both ASP.NET and Node.js are great options for projects of different complexity.


The market presents a great variety of UI technologies to maintain the web app development process on a high level. Whereas Javascript frameworks have sharply increased in popularity, the developers would still make a choice for the ones that can anticipate arising trends and keep their leading positions for the long-term period. At present the most market share is divided between three JS frameworks – React, Vue.js and Angular. UI development approaches are quite dynamic and changeable. The recent UI trends have set the high requirements that can be only met by the most innovative software building approaches.

JS frameworks for custom web application development

JavaScript technologies popularity. Source:


React is a UI framework developed and supported by Facebook. Its popularity is growing extremely fast due to a number of provided advantages. Virtual DOM advances the overall user experience and simplifies the developers’ work. They have the ability to apply reusable components and build stable code with the help of one-direction data flow. It offers excellent backward compatibility. The learning curve is relatively longer however it’s worth getting acquainted. Improvement speed is impressive and they keep on presenting the additional development tools on a constant basis.


Vue.js is a JS framework for creating user interfaces without additional extensions. It offers a clear and simple approach that is supported by detailed documentation. It is often used for separate components as well as single-page apps. At the same time, Vue.js remains quite flexible and can be combined with other libraries. Nevertheless, the community keeps on growing, it’s still among the smallest one on the market.


Angular is the JavaScript framework that was rewritten from AngularJS. The Google team has presented an original solution for network development with new features and logic. As for the programming language, developers apply TypeScript with its distinct features like async/await, arrow functions, class syntax, etc. Moreover, this UI framework remains compiled to Javascript and works with component-based architecture. Despite the fact that Google focuses on providing high performance and delivers strong support for the community, the learning curve might be quite complex due to component management, dependency injections, etc. Another thing is that Angular still deals with migrating the legacy systems form AngularJS and works on providing more detailed CLI documentation.

The final choice will be quite evident. React has been named the best JS framework for the last several years. Providing one-direction data flow in comparison with two-way data binding (Angular) or both options with default one-way binding(Vue.js), it definitely takes higher market positions. It is much easier to work and carry out maintenance. Another advantage is the number of available specialists on the market that are proficient with this JavaScript framework.


Like any other SDLC model, the web application development cycle will not be an exception here. It has to go through all the required stages and meet the initial purposes of the project.  Early-stage development supports the proceeding steps while omitting some of them results in unexpected consequences. Being attentive to details and following the regulations helps to balance between high quality and increased productivity.

Here are some fundamentals of the custom web application development cycle. Firstly, it has to go through the following stages: the requirements outline, time and budget estimate, design and conception, coding, testing, deployment, and post-production. Secondly, it’s worth remembering that these stages are tightly related and require effort and certain resources including time, workforce and cost.

Starting with the requirements analysis, the company needs to outline the final goals covering functionality and necessary documentation. With the help of these details, it is possible to classify tasks and perform a complexity analysis to estimate the approximate timeline and budget. Moreover, the conception stage provides the development guide and design details to order the tasks and identify their dependency. Only after this development itself starts with following all the flow regulations outlined previously. Testing is usually performed in parallel to minimize bugs and get the product ready for the user acceptance test. Sometimes deployment is considered the final stage as it deals with the software release on the market. However, there is the last but not the least stage – post-production. 

Let’s focus more on this moment as continuous maintenance and support are among the top criteria. In order to advance user experience, it is important to learn the application behavior in a real environment, analyze the user feedback and work on updates. From the overall experience in web app development, the most successful projects have been performed by the means of continuous SDLC models. 

popular SDLC models for custom web development

They target at gradual execution of each stage to the full extension. For instance, the Agile methodology relies upon addressing complicated tasks while delivering productivity through every step. It is a great solution for the companies that are interested in offering web app development services, optimized according to the users’ needs. New solutions are supported via flexible iterations. This model requires only initial planning while the rest will base on received experience and newly defined requirements. As long as the company considers a moderately small project with a stable definition, they can apply the Waterfall methodology where the stages are going in order and usually presenting the expected results. Due to the fact that the custom web app development process is sophisticated and time-consuming, we suggest using Agile methodology. The good point is that it’s suitable for both new and ongoing projects.


In light of the fact that website development cost depends on a number of criteria, it is quite important to cover them in making the project estimate. It is obvious that the app complexity is among the determining factors. Since the chosen cloud app functionality helps to outline the work scope and timeline, it will be much easier to make further calculations. Using the same approach, the company can outline the number of specialists, required skills and experience in certain technologies. All these things considered the company can set priorities to estimate the budget. The cost of custom web app development usually differs due to the project’s needs as well as the chosen workforce. 

In order to make an estimate, we’ve chosen three sampled projects of different complexity and decided to leave the same team composition. The development life cycle covers similar stages and needs to involve specialists to complete the tasks including management, business analysis, design, back-end, and front-end development, testing, etc. These are the average hourly rates for custom web app development services.

  • Project manager – $60/hr 
  • Business analyst – $60/hr 
  • UI/UX designer – $45/hr  
  • Back-end developer – $70hr 
  • Front-end developer – $70/hr 
  • QA engineer – $40/hr  

Applying the following rates for custom application development services, we’ve received the cost of the simple software with basic functionality, the medium one covering the moderate features, and the complex app with the most advanced functionality. 

custom web application development cost

The average cost would fluctuate between $70k and $160k+. 


It is important to understand the significance of setting an effective custom web application development team. Assigned specialists need to be fully engaged in the SDLC and open for collaboration with other team members. Covering the needs of the development process, the company has to establish great management, carry out business analysis, create UI/UX design, focus on professional software building with up-to-date technologies, test and deploy the cloud app in both staging and production environments. In order to arrange those workflows, the typical composition of a web dev team would consist of a product owner, a project manager, a business analyst, UI/UX designers, back-end and front-end developers, QAs. We’ve compiled the list of the common responsibilities for each team member.

web development team composition: main responsibilities

Depending on the complexity of the custom web app, the company could vary the number of required specialists. For example, they can arrange internal teams of custom web application developers. Usually, it can be a team of 1 senior front-end and 1 back-end specialists and 3-4 junior/mid ones. In such cases, the juniors can deal with the basic tasks while seniors look for advanced solutions. Companies have to consider the fact that the right team composition is the main tool to deliver successful network apps within reasonable timeframes.


Custom web app development isn’t just a current market trend, it has proven such popularity by delivering functionality and flexibility. Both companies and developers favor fast service delivery, reduced resource waste, improved customer support, and business continuity. Up-to-date technologies and SDLC models have simplified engineering as never before. The availability of efficient server-side and UI technologies enables innovative approaches. Whenever companies decided on the cloud app, they need to cover the following aspects:

  • Define product ideas and requirements.
  • Outline the project complexity. There is always room for improvement so definitely consider the scalability of the cloud app.
  • Make a choice of server-side and JS frameworks. ASP.NET and Node.js are considered the best choice for backend and React for frontend at present.
  • Choose cloud app architecture. The up-to-date structure can be delivered by the right combination of cloud app and web server architectures.
  • Set up the custom web application development team, covering management, business analysis, design, back-end and front-end work, testing.
  • Apply the appropriate SDLC model. The Agile methodology would deliver continuous implementation within the best productivity.

We hope that our article has helped to find out more about custom web app development and suggested fresh ideas for future implementation.

If you have any additional questions – feel free to contact Existek. We are an outsourcing software company that has extensive experience in providing custom application development services. For further assistance, you can visit our contact page or start the discussion in the chat widget on the right. 

Frequently asked questions

How are web applications developed?

Web app development has never been so easy as it is at present. Developers can choose among numerous tools and standardized frameworks to develop a web application. The variety of front-end and server-side technologies enables web app development due to the latest trends.

What technology do web developers use?

In order to maintain the web app development process, developers have to choose one of the following technologies:

  • Server-side technologies (Node.js, ASP.NET, PHP, Java, and Ruby on Rail)
  • Front-end frameworks (React, Vue.js and Angular)

How much does it cost to develop a web app?

The web application cost varies depending on the project complexity. 

  • The cost of simple software with basic functionality starts at $70 000.
  • The medium software covering the moderate features costs approximately $120 000. 
  • The average cost of a complex app with the most advanced functionality is $160 000.

What is the best way to develop web applications?

The best idea is to define the step-by-step guide and keep on following it.

  • Define product ideas and requirements.
  • Outline the project complexity.
  • Make a choice of server-side and JS frameworks.
  • Choose cloud app architecture. 
  • Set up the development team 
  • Apply the appropriate SDLC model.
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