Cloud-Native Applications: An Essential Guide

In the data-driven modern world, app development technologies are constantly evolving. Users and companies process, access and deliver tons of information every single day, so there is no wonder more and more various ways how to build an application appear.

In this article, the cloud-native application, its benefits and drawbacks, methods and meaning will be discussed.

What is Cloud-Native Application, and Why Does it Matter?

The term is often confused with cloud-based applications, though it’s not the same. In reality, it means that the app is developed using cloud-based tools and it’s hosted and managed in the cloud as well.

  • Cloud-based: the operating system of the on-premise app is reconstructed and moved into the cloud.
  • Cloud-native: the app is created and deployed in the cloud from the very beginning.

Native computing stands for agility and flexibility, which makes a customer experience great, ensures security, high-level performance and rapid development. Moreover, the software is broke into small units instead of the cumbersome monolithic architecture, allowing high-speed and non-risky changes in the codebase.

Cloud-Native Application Architecture

Understanding the approach to building the cloud-native app won’t be complicated if you are familiar with microservices and containers.

Microservices Explained

Microservices are single-function structures. They are independent, accomplish only one specific business goal and can be deployed separately, which makes them flexible in terms of code, disaster recovery and testing.

Want to know more? Visit our microservice blog.

Containers Explained

A container is a software unit that can run everywhere regardless of the operating system and environment. So, it’s suitable both for computers and clouds. They provide a lightweight runtime and libraries, being agile and scalable components.

Three Cloud-Native Application Key Features

Here is a list of several features that are crucial components in the cloud-native application building.

API Driven

Cloud-Native Applications API Driven

Image Source: AWS

Although microservices are independent units, they have to communicate effectively. To ensure high compatibility, API (Application Programming Interface) is used. It’s a software function that allows separate units to talk to each other. Usually, developers use the RESTful API.

REST technology is a web service that is similar to SOAP but operates better. It works as a loosely coupled architecture and uses smaller bandwidth working faster than SOAP, which is perfect for internet and cloud-native scalability.

Last but not least, any API call fails can be solved through endpoints.

Service Mesh

Service Mesh

Image Source: AWS

The cloud-native app is a complex system, consisting of up to thousands services that are connected through a network. It’s difficult to manage requests at different layers, so the service mesh is introduced.

The service mesh is an infrastructure layer, that copes with communication between services. It’s built as lightweight network proxies. The networking tool uses such techniques as load balancing, service discovery.

The picture shows how does AWS App Mesh work. The vivid benefit is that the service re-routes the traffic to a healthy unit if there is a need.

Horizontal Scaling

Horizontal Scaling

Image source:

Horizontal scaling is the ability to add machines to your resource pool (scaling out), whereas vertical scaling means adding more power (scaling up). But don’t imagine it literally as a physical process. The scaling is made through pods.

A pod is a container manager that consists of one or multiple containers. Kubernetes is one of the AWS services that deploys and manages containerized apps. It automatically starts running pods if there are certain resource requirements, routes traffic and connects the services.  Each pod has its IP address.


Storage. Cloud-Native Applications

Image source: AWS

Cloud-native applications rely on containers, as they are flexible, portable and disposable. However, the huge amount of information needs a safe storage environment to save user data from each session. One of the best on the market is Amazon S3.

It is a service for modern microservices delivery that ensures your data is protected with cost-effectiveness. Some of the S3 benefits are:

  • Durability: S3 creates and stores copies of the data to keep it safe and sound in multiple areas.
  • Amazon S3 API can be used for calls into code.
  • Since some data sets can be shared between different apps, it’s important to store these data sets securely. S3 copes with this task, allowing to aggregate and access data.

Why Should You Use the Cloud-Native Approach

You may have grasped several advantages of cloud-native computing already, but we have even more ideas on how you can benefit from this approach.

No server needed!

Cloud-native applications run as serverless infrastructures (also known as function-as-a-service). FaaS lifts the burden of maintaining the software or hardware service from developers’ shoulders.

We recommend using AWS Lambda for running your code.

Disaster resilience

The app has a tolerance of faults, so your app’s performance and the user experience will be at a high level. If a disaster happens, another region will cover. It highlights the advantage over on-premise infrastructure which, if fails, can cause app downtime and money spending.

Automatical Scaling

The autoscaling detects changes and keeps your app up-to-date, eliminating the chances of performance lags and failed user experience.


It may sound suspicious, as any type of computing requires a lot of money. However, the automation of all processes benefits your budget. Containers ensure security, which saves you from spending on disaster recovery and losing money because of downtime. Serverless computing eliminates the need to hire a separate team for maintaining a server.

It Makes You Competitive

A modern world of business is harsh – everyone battles for users’ attention, and your app won’t lose if built as native-cloud. It performs with desirable speed and innovation, which allows keeping business continuity and competitive advantage.

Summing Up

We want to remind you about some key strategies for building the cloud-native app.

  • Use microservices to break the app’s infrastructure into independent, easy-to-scale components. You will never worry about downtime.
  • Let containers do their work. They keep all dependencies and codes in one place, allow the software to run in any environment and make scaling up a piece of cake.
  • Serverless architecture saves more money. Don’t be afraid to use cutting edge computing technologies.

In case you want to move your business to the next level by applying new technologies, contact our team of experts. Here, at Romexsoft, we can provide multiple custom solutions for your enterprise.

Ivan Shulak
Ivan Shulak Sr. Delivery Manager, Senior Application Architect at Romexsoft | AWS Certified Solutions ArchitectOracle Certified Professional, Java SE 8 Programmer | Keen on Java Application Development and Cloud Application Development.
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