Author: Sergio Lema
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Feature Flags: Deploy Unstable Features
In this article I describe the features flags. I explain when I use them and how I use them in different situations. I explain the needed maintenance and the final clean up.
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Optimize Your API Using Memoization
In this article I describe how to use the memoization to optimize the response time of a request. I explain how to prepare the code and how to apply the solution.
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Security In The Cloud: 7 AWS Best Practices
In this article I describe 7 AWS best practices to ensure the security in the Cloud. I explain how to configure the VPCs, the IAMs and the naming strategy for any service.
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Deploy A Spring Boot Application in AWS Lambda
In the article of today, I’m gonna explain how to deploy a Spring Boot application in AWS Lambda. I want to deploy a complete web application into a serverless platform. The difference is that I want to create several endpoints in my Spring Boot application. And I want to map them all to a single…
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What Does My CI/CD Pipelines Look Like?
In the following article, I show how to build an effective CI/CD pipeline in GitlabCI. I show how to separate some steps depending on the branches. Which steps are mandatory and best practices.
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How I use Gitflow in real-life projects with GitlabCI
In the article of today, I’m gonna explain the usage of Gitflow in real-life projects. What adaptations I’ve made and how do I use it in my projects. I will also show how I’ve implemented Gitflow in my GitlabCI platform.
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How to use React for a CRUD application
In this article, I show how to create the frontend of a CRUD application in React. I explain how to create the project and all the components necessary. The create, read, update and delete.
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4 Ways to Protect Your Application From Being Hacked
In this article I describe 4 ways to secure an application to avoid 90% of the attacks. 4 simple ways to put in place in every kind of application. From using HTTPs to an external configuration system.
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How to Solve a NullPointerException Correctly
In Java, one of the first exceptions everyone sees is the NullPointerException. Unfortunately, it took me some time to understand how to solve it correctly. In this article, I explain how to solve them correctly.
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How Not To Create An Application
In this article I explain how not to create an application. I describe a real use case where I worked some years ago. Where we build a big application with a lot of complexity. But no clients and no profits.
The Dev World - Sergio Lema 