Skip links
serverless architecture on AWS guide

Tutorial: Build Web App With Serverless Architecture on AWS

The serverless architecture on AWS is establishing itself as a game-changer, redefining how web application developers create and scale them. 

Developers can use tools and services offered by Amazon Web Services (AWS) to build highly scalable and affordable online applications. AWS provides a robust platform for serverless solutions. 

In this ultimate tutorial, we’ll explore the idea of serverless architecture on AWS and discuss how to implement it while creating a scalable web application.

Understanding Serverless Architecture on AWS

“Serverless architecture” is a cloud computing concept that makes the underlying server infrastructure abstract so developers can concentrate entirely on building code for their applications.  

The serverless architecture on AWS can take care of your infrastructure, scale, and maintenance, so you don’t have to worry about provisioning or managing servers.

AWS Lambda functions serve as the foundation of serverless architecture on AWS. Lambda is a compute service that executes your code in response to events and manages the necessary compute resources for you. 

4 Benefits of Serverless Architecture on AWS

AWS is generally considered to be a powerful platform. The following are some of the benefits of utilizing serverless architecture on AWS.


Unmatched scalability is a key benefit of implementing serverless architecture on AWS. Your web applications can remain responsive even during erratic spikes in traffic thanks to the architecture. AWS automatically scales the infrastructure to meet any demand level when using serverless computing. With this autonomous scaling, you can be sure that your apps can adjust to changing workloads with ease and always offer a responsive and easy-to-use experience for users.


Serverless architecture on AWS provides an affordable model compared to traditional server-based techniques. With the pay-as-you-go pricing approach, you only have to pay for the computational resources used while your functions or apps are running. Due to this flexibility, major cost savings are possible and upfront infrastructure expenditures are no longer necessary. Because costs can be accurately aligned with real consumption, serverless computing becomes an economically advantageous solution for organizations looking to maximize their spending.

Reduced Operational Overheads

Infrastructure management becomes easier while using AWS’s serverless architecture. Because AWS manages all aspects of server provisioning, patching, and maintenance, developers are free to focus on developing code and creating business logic. Because they can devote more time and resources to innovation rather than mundane infrastructure administration activities, development teams are able to be more responsive and agile. This is made possible by the elimination of operational overheads.

Quick Deployment

Developers may concentrate on developing and releasing things more quickly now that the strain of server maintenance has been removed. A microservices-oriented methodology is encouraged by serverless architecture, which makes it possible to create modular and readily deployable components. Since modifications to one function or service don’t need changing the entire application, modularity improves development speed and agility. Quicker update releases and iterations by developers promote a responsive and dynamic development environment.

10 Steps to Build a Scalable Web App on AWS Serverless

Let’s now get started with the procedures for using serverless architecture to construct a scalable web app on AWS.

Define Application’s Scope

Understanding your web app’s requirements and purpose before developing it is essential. Define the functionality, data storage requirements, and any necessary integrations or third-party services. Your architecture will be built on top of this.

Choose AWS Services

You can create your serverless web app by combining various AWS services. Here are some top services to think about:

  • AWS Lambda: Write your application logic as Lambda functions. These functions can be triggered by various AWS services or HTTP requests using Amazon API Gateway.
  • Amazon API Gateway: Create RESTful APIs to expose your Lambda functions as HTTP endpoints, allowing users to interact with your application.
  • Amazon DynamoDB: Use DynamoDB for a highly scalable and fully managed NoSQL database to store your application’s data.
  • AWS S3: Store static assets like images, CSS, and JavaScript files in Amazon S3 buckets.
  • Amazon SNS and Amazon SQS: Utilize these services for event-driven communication and background processing.

Develop Your Application Code

Utilizing serverless development best practices, write the Lambda functions’ code. Keep your functions short and narrowly focused on a single task to maximize reusability and maintainability. To solve any potential problems, make sure that errors are handled correctly and that they are logged.

Set Up Your Data Layer

To manage and store the data for your application, create tables in Amazon DynamoDB. To improve database performance, define the data model and access patterns. DynamoDB Streams can be used for real-time data processing and alerting as well.

Configure Security

Security must always come first in web applications. To give your Lambda functions and other AWS resources the necessary permissions, use AWS Identity and Access Management (IAM) roles. For user identification and authorization, use Amazon Cognito.

Create API Endpoints

Utilize Amazon API Gateway to design your API endpoints. Define the routes, methods, and Lambda function integration. To secure your API, alter the login and authorization settings on API Gateway.

Frontend Development

Implement a framework like React, Angular, or Vue.js to create the front end of your online application. Use AWS Amplify or Amazon CloudFront for content delivery and HTTPS support, and host your static assets on Amazon S3.

Test and Deploy

Test your program thoroughly at each stage of creation. Use AWS CodeBuild and CodePipeline for deployment and automated testing. To lessen the impact of upgrades on your users, consider blue-green or canary deployment tactics.

Monitor and Optimize

Once your web application is operational, use AWS CloudWatch and other monitoring tools to monitor its performance. Set up alarms to receive timely notifications of any problems. 

To track and examine application performance, use AWS X-Ray. Continually improve the performance and cost-effectiveness of your Lambda functions and other resources.

Backup and Recovery

Put backup and recovery plans in place for your application and data settings. AWS provides services like AWS Backup and Disaster Recovery to automate these procedures.

Transform Web App Development with Serverless Architecture on AWS

How web application developers create and scale them has been entirely transformed by serverless architecture on AWS. Teams can concentrate on providing value to users thanks to its scalability, cost-effectiveness, and reduced operational overhead.  

By utilizing AWS services and following the instructions in this article, you can create a highly scalable web app that can handle any traffic volume while keeping expenses low. 

Inferenz provides top-notch AWS-related solutions to enterprises seeking AWS expertise. Besides AI/ML development, data integration, and analytics, Inferenz empowers companies to reach their full operational potential with AWS! For more information, get in touch with us today!

serverless architecture on AWS 2023