Explain What Microservices Are. Learning 2023’s Architecture, Best Practices, and Examples

Microservices is a software design pattern where each component of an application is divided into smaller, independent services that are deployed separately and communicate with each other via APIs. Compared to the traditional monolithic architecture, the microservices architecture offers benefits such as greater scalability, flexibility, better fault isolation, and quicker development. To fully realise the potential of microservices architecture, it should also boast certain key features such as decentralised governance, independent deployability, fail-safe designs, and loosely coupled inter-service integration. Leading companies such as Netflix and Amazon have successfully embraced microservices architecture.

This blog article aims to provide answers to these and other related questions.

In simple terms, what do microservices refer to?

Microservices architecture is a software development approach that involves dividing complex applications into smaller, self-contained services. These services interface with each other and the shared server through APIs, thereby enabling them to collectively achieve a larger goal.

Note: Microservices became popular as software development moved towards greater flexibility and a loosely-tied service-oriented model.

For those unfamiliar with microservices, how exactly do they operate?

The microservices architecture allows a program to be divided into its constituent components. Each of these services handles a specific set of tasks, such as database management, generating alerts, user authentication, interfacing, and data logging.

Each service can be managed independently both within themselves and across the application as a whole.

How does using a microservices architecture compare to a monolithic architecture, and what benefits does it offer?

In monolithic architectures, modifying applications can be difficult due to their intricate nature. For any changes to be made, a new program version must be developed and rolled out. Moreover, every process within the system is interlinked, making it necessary for the entire infrastructure to scale up to satisfy bandwidth requirements.

The microservices architecture’s decoupled approach allows even the most intricate of programs to be split into distinct components. Since each service can be updated and redeployed independently of the other parts of the application, any modifications can be made quickly and efficiently.

Increased flexibility and scalability are the two primary advantages of using the microservices architecture for software programs.

What are the key characteristics that define a microservices architecture?

The primary defining attributes of microservices architecture are as follows:

  • Entropy

    Microservices can be deconstructed into smaller components that are more manageable, enabling independent development, deployment, and testing. This feature enables developers to make modifications to individual components without impacting other parts of the program.
  • Robustness

    If a component of a microservices application malfunctions unexpectedly, traffic can be redirected to other parts of the system. Moreover, monitoring microservices for malfunctioning is simple, and solutions can be swiftly implemented after determining the root cause of the issue.
  • Decentralization

    Microservices architecture allows developers to tailor tools for specific modules while also making them accessible to other modules. Further, decentralization of the code enables users to create effective applications quickly and easily.
  • Lightning-fast Communication

    Dumb wiring is used to accelerate data transmission among the various components of a microservices program. Microservices components receive requests, execute necessary processing, and provide responses to the requesting system. In order to optimally route requests, microservices receive requests and use logic to determine the most appropriate responses.

Applications of Microservices Architecture

The demand for microservices is growing among major technology firms due to their ability to improve operational efficiency, develop resilient systems that can be easily modified, and shorten the development timeline. Here are a few instances of how microservices architecture can be used in enterprise settings…

  • Amazon

    Amazon’s website initially employed monolithic architecture, which integrates services across multiple layers, including client profiles, order management systems, and inventory management, all of which are kept in a unified, centralised location.

    As a result of increased demand, Amazon expended its codebase and hired more developers, which led to a slower software development life cycle and service dependencies.

    To address these issues, Amazon embraced microservices architecture, which involves dividing their software and websites into smaller, more manageable components that communicate via application programming interfaces.

    Upon adopting the microservices design, developers analysed the codebase and extracted reusable components. They also encapsulated the modular components in a web interface and created specialized features for different parts of the website without affecting the rest of the system.

    To develop successful microservice systems, Amazon implemented the ‘you made it, you run it’ rule and the ‘two-pizza team’ rule. The ‘you built it, you run it’ rule ensured that developers were held accountable for their services, while the ‘two-pizza team’ rule ensured that teams were of a manageable size and required no more than two pizzas for lunch.

    By using a microservices architecture, Amazon was able to optimize operational processes and increase their capacity in response to growing demand.

    Related Posts: Former Amazon Vice President’s Guide to Technical Interviewing

  • Netflix

    Due to issues with its primary database, Netflix turned to Amazon for inspiration and adopted a microservices architecture. By implementing cloud-based distributed systems with horizontal scalability, Netflix was able to replace the vertically-scoped relational databases in its data centres.

    Netflix employed the microservices approach to break down its application architecture into different components, such as services to track viewing history, process payments, and provide content recommendations to users.

    Thanks to adopting a microservices architecture, Netflix’s engineers were able to expand server capacity quickly after transitioning to AWS because it was not possible to construct data centres quickly enough due to the constant growth in Netflix’s subscriber base.

    Microservices facilitated the formation of smaller teams, allowing developers to increase their productivity and responsiveness.

  • Uber

    Uber originally implemented monolithic architecture for their ride-sharing software when they first launched, starting out serving only San Francisco. This allowed them to adhere to business constraints, maintain a simplified codebase, and rapidly deploy essential features.

    However, when Uber grew to expand globally, modifications were necessary to ensure that the ride-sharing software could be used in new cities. Unfortunately, the monolithic design imposed certain limitations, leading to various problems such as bug fixing, implementing new features, and syncing global operations.

    Uber consequently re-engineered their ride-sharing software in compliance with the principles of microservices architecture, resulting in a system of independent yet interconnected sub-components, each with its own data store.

    By optimizing their development process to enable continuous delivery across all of Uber’s locations, the company was able to achieve considerable commercial growth following the implementation of microservices architecture.

The Cutting-Edge of Microservices Architecture in 2023 and How to Implement It

Here are the 2023 guidelines for microservices architecture.

  • Analyze your company’s needs.

    Before embracing microservices architecture, firms should take into account several factors, such as their unique requirements, existing systems, and the possible features that can be integrated into the overall design. It is also important to assess the technical team’s expertise in order to determine their ability to transition to a microservices structure effectively.
  • Ensuring Maximum Security

    Employing microservices architecture necessitates the use of an API gateway to oversee the expanded attack surface. An API gateway can facilitate service requests, authentication, and rate limiting.

    For microservices to operate correctly, they require a domain-specific architecture and secure data. Additionally, the microservices architecture must exhibit strong coherence and minimal external dependencies.

  • Utilizing Simulated Hardware

    Virtual machines enable the maintenance of a consistent development environment whilst allowing for quick modifications to be made to the infrastructure and the release of microservices architecture components.

    To keep control logs organized and prevent application crashes from user service requests, it is imperative to have a dedicated repository for each service.

  • Storage and Deployment

    A recommended method for microservices deployment is to host and release each service independently. This approach can save time and money, improve fault tolerance, reduce the risk of complete outages, and enable the separation of components from any problems in other services.

    Containers designed for microservices can enhance platform compatibility for businesses and simplify the deployment process through autonomous builds.
  • Selecting the Right Database Solutions

    When selecting a database for a microservice, it is crucial to choose one that can meet the specific needs of the service. By pairing the appropriate database with the relevant infrastructure and storage, an effective system for managing multiple services can be established.


A large number of companies are gravitating towards microservices architecture for their software development, as it allows them to keep the application running while making changes to different components with minimal impact on end users. To choose the most appropriate microservices architecture, businesses must take into account their unique goals and requirements.

Do you require assistance in transitioning to microservices architecture?

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  1. What precisely do microservices include?

    Microservices comprise the following components:
    • Containers:

      Containers are software packages that aid in separating multiple services into their own distinct environments.
    • Service Mesh:

      Service Mesh’s dynamic communication and enhanced security allow for seamless collaboration.
    • Acquiring New Services:

      Service Discovery simplifies dispatching and balancing the workload of microservices.
    • API Gateway:

      The API gateway handles the administrative duties and load balancing.
  2. What are the different types of microservices?

    Microservices can be classified into two categories: stateless and stateful. Stateless microservices execute the necessary tasks when responding to requests but do not store any long-term data. Meanwhile, stateful microservices maintain and utilize some form of state during the processing of service requests.

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