Understanding Serverless Architecture: Advantages and Use Cases

January 12, 2023
5 minutes read

What is Serverless?

Serverless is a term that refers to the concept of building and running applications and services without having to manage the underlying infrastructure. Instead of having to provision and maintain the servers, the cloud provider is responsible for allocating and scaling the necessary resources with serverless, such as computing power and storage. This allows developers to focus on writing code and to build features without worrying about the infrastructure management. The most well-known examples of serverless are AWS Lambda, Google Cloud Functions, and Azure Functions.

Why use Serverless? (Advantages)

There are several reasons why developers might opt for a serverless architecture:

  1. Cost savings: By only paying for the resources and the computing power used, serverless can be more cost-effective than traditional server-based architectures.
  2. Scalability: Serverless allows for automatic scaling of resources, meaning that the application can handle increases or decreases in traffic without any manual intervention.
  3. Flexibility: Serverless allows developers to build and run a wide range of applications and services such as backend services, APIs, and event-driven functions.
  4. Reduced operational complexity: With serverless, developers do not need to worry about managing and maintaining the underlying infrastructure, which can save time and effort.
  5. Improved security: Many serverless providers offer built-in security features such as automatic patching and protection against common threats which can simplify security management and reduce the risk of data breaches.

When to use Serverless? (Use Cases)

Here are a few situations in which serverless can be a good choice:

  1. Event-driven applications: Applications that are triggered by specific events, such as image uploads, form submissions, or button clicks, are well-suited to serverless.
  2. Microservices: Serverless can be a good choice for building and deploying microservices, as it allows developers to break an application down into small, independent services that can be scaled and managed separately.
  3. Variable workloads: Serverless is a good fit for applications with unpredictable or variable workloads, as the automatic scaling capabilities of serverless can help to ensure that the application can handle traffic spikes.
  4. Cost-efficiency: Serverless can be cost-efficient for applications that have low or infrequent usage. It allows you to only pay for the resources that you use.
  5. Rapid development and Prototyping: Serverless can make it easy and fast to build and deploy simple applications and prototypes, as developers can focus on writing code without worrying about infrastructure management.


While serverless can be a good choice for many types of applications, it may not be the best fit for all situations, specifically when you have a high load and constant running services. In those cases, it could be more cost-efficient to have your own servers.

Serverless doesn’t mean there aren’t any servers and it is all handled by magic. It still runs on servers, but the management, scaling, availability, and capacity planning are handled by the cloud provider. As a user or developer, you are just paying for the usage without worrying about the underlying servers.

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