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Author's profile photo Kumar Gaurav

Beyond the Human Eye: The Power of Automated Code Review Tools

Place: Conference Room of an MNC Company in Bengaluru

Context: Discussion on Code Review for a snippet of a code

John: Hey, Sarah. Can you review my latest code changes? I’d love your feedback before we merge it with the main branch.

Sarah: Sure, John. I’d be happy to. Let me pull up your changes here in our code review tool.

John: Great. I’m mostly concerned about the performance impact of this new feature. I know it’s doing a lot of data processing, but I’m not sure if I’ve optimized it enough.

Sarah: All right, let me check. Hmm, have you considered using a more efficient algorithm for this part of the code?

John: Actually, I hadn’t thought of that. Do you have any suggestions?

Sarah: Yes, I know of a few libraries that might be useful here. Let me pull up some documentation and we can take a closer look together.

John: That would be great. Thanks for your help, Sarah.

Sarah: Of course, that’s what teammates are for. By the way, I noticed a few formatting inconsistencies in your code. Let’s fix those up while we’re at it.

John: Oh, thanks for catching that. I’m still getting used to the new style guide.

Sarah: No problem, it happens to all of us. And I think these changes look good now. Let’s go ahead and approve this code for merging.

John: Awesome. Thanks again for your help, Sarah.

Sarah: Anytime, John. That’s what code reviews are for.

In the software industry, all companies follow the code review process diligently. Many companies still use manual code review. I wanted to point out the advantages of using automation instead.

It is important to note that while automated code reviews can provide many benefits, they should not replace manual reviews entirely. Manual reviews are still necessary to ensure that code meets business requirements, and to identify issues that may not be caught by automated tools. Automated reviews should be used as a complement to manual reviews, not a replacement for them.

Certainly, here are some considerations when automating code reviews:

🔧 Choosing the Right Tool: Select an automated code review tool that fits your team’s needs and integrates with your existing workflow.

🎨 Customization: Configuring the tool to match your team’s specific requirements and preferences.

📚 Training and Adoption: Providing training and support to your team to ensure they are comfortable using the tool and understanding its benefits.

🤝 Collaboration: Encouraging collaboration between team members to complement automated code reviews with human code reviews.

🚦 Continuous Improvement: Incorporating automated code reviews as part of a continuous improvement process to enhance code quality over time.

🔍 Pull Requests: Utilizing pull requests to allow for automated code reviews before changes are merged into the main codebase.

🛡️ Code Quality Gates: Setting up quality gates to ensure that code changes meet a certain level of quality before they are merged.

📏 Coding Standards: Defining coding standards to maintain consistency and quality across the codebase.

🎯 Prioritization: Prioritizing issues based on severity and impact to address the most critical issues first.

📈 Code Review Analytics: Using analytics to gain insights into the effectiveness of the code review process and identify areas for improvement.

In summary, automating code reviews can provide many benefits for development teams, but it’s important to choose the right tool, customize settings, provide training and support, integrate the tool into your workflow, and continuously improve your code quality processes.

Here are some live examples of tools that can be used for automated code reviews:

SonarQube: SonarQube is a popular open-source platform for continuous inspection of code quality. It can analyze code in over 25 programming languages, including Java, C++, Python, Ruby, and JavaScript. SonarQube’s main features include code quality analysis, bug detection, vulnerability detection, code coverage analysis, and complexity analysis.


Let me create a hypothetical situation to best explain the use of Sonar:

Imagine you’re on a quest to explore a magical land, but you need a guide to help you navigate the treacherous terrain. SonarQube is that guide for developers, helping them explore the vast landscape of their codebase and avoid dangerous pitfalls. Through, SonarQube, developers can see a map of their code, highlighting areas of concern and offering suggestions for improvement. Just like a GPS system, SonarQube can help developers navigate their codebase and steer clear of potential bugs and performance issues. But SonarQube is more than just a map – it’s also a powerful tool for analyzing code quality. It can identify complex code smells, pinpoints duplicate code, and even detect security vulnerabilities. Think of SonarQube as a trusty sidekick for developers, helping them on their journey to build high-quality software. With SonarQube by their side, developers can confidently explore their codebase and overcome any challenges they encounter along the way.

Code Climate: Code Climate is a cloud-based automated code review and analysis platform that helps development teams identify and fix code quality issues before they impact the production environment. It supports a wide range of programming languages, including Ruby, Python, JavaScript, TypeScript, and Go. One of the key features of Code Climate is its ability to provide actionable feedback on code quality issues, making it easier for developers to understand what they need to fix and why. It also integrates with a variety of other tools, including GitHub, Bitbucket, and GitLab, making it easy to incorporate code quality analysis into your existing development workflow. Code Climate provides a wide range of metrics and insights, including code complexity, duplication, maintainability, and test coverage. It also provides recommendations for improvement, based on industry best practices and coding standards.


Code Climate is used by many companies, from startups to large enterprises, including Airbnb, Shopify, and Zendesk. Its popularity is due to its ease of use, powerful analytics, and flexibility, making it a valuable tool for improving code quality and reducing the risk of production issues.

ESLint: ESLint is a popular open-source JavaScript linting tool that helps developers identify and fix code quality issues in their JavaScript code. It is highly configurable and can be customized to meet the specific needs of a development team. ESLint checks JavaScript code for syntax errors, as well as style and code quality issues. It also supports the latest ECMAScript standards, as well as popular frameworks like React and Vue. Developers can configure ESLint to enforce specific coding standards and rules, as well as to ignore specific code files or lines of code.

One of the key benefits of ESLint is that it can be easily integrated into development workflows through tools like Visual Studio Code, Sublime Text, and Atom. It also supports automated code formatting, making it easier for developers to ensure that their code is formatted consistently.

GitHub Actions: GitHub Actions is a popular platform for automating software development workflows. It can be used to run automated code reviews as part of the pull request process, enabling developers to receive feedback on their code changes quickly and easily.

Jenkins: Jenkins is an open-source platform for continuous integration and delivery. It can be used to set up automated code reviews using plugins such as SonarQube and Checkstyle, providing developers with feedback on code quality and adherence to coding standards. Let me further explain with the help of a hypothetical instance:

Imagine a conveyor belt where developers place their code. Jenkins is the machine that automatically picks up the code and runs it through various tests, including automated code reviews using plugins like SonarQube and Checkstyle. As the code moves along the conveyor belt, Jenkins inspects it for quality and adherence to coding standards. If any issues are found, Jenkins sends the code back to the developer for improvements. Once the code passes all the tests, Jenkins delivers it to the production environment, where it can be used by customers.

This automated process ensures that code is thoroughly reviewed and meets the necessary standards before it is released, improving code quality and reducing the risk of errors or security vulnerabilities in production.

By using these tools to automate the code review process, development teams can improve code quality, reduce the time and effort required for code reviews, and increase developer productivity.

Many companies use automated code review tools to streamline their code review process and ensure code quality. Here are some examples:


With a plethora of automated code review tools available, including the likes of ESLint, RuboCop, SonarQube, and CodeGuru, there’s something for everyone. Whether you’re a small startup or a giant corporation, these tools can help you ensure that your code is top-notch and that your development process is running smoothly. Companies like Google, Microsoft, Netflix, and Amazon are just a few examples of organizations that have embraced these tools and reaped the rewards. By automating their code review process, they’ve been able to deliver higher-quality software faster and more efficiently than ever before.

“In the words of Steve Jobs, ‘Innovation distinguishes between a leader and a follower.’ Companies that embrace automated code review tools are setting themselves apart as leaders in the software development industry. By leveraging these tools, they can catch potential issues earlier in the development process, reduce the time and effort required for manual code reviews, and ultimately deliver better software to their customers.” In a world where software development is advancing at lightning speed, automated code review tools have emerged as a beacon of hope for developers. These tools offer a way to streamline the code review process, improve code quality, and save precious time and resources that can be invested elsewhere. By leveraging the power of automation, software development teams can gain a competitive edge and stay ahead of the curve.


1) Self-managed | SonarQube | Sonar (

2) Find and fix problems in your JavaScript code – ESLint – Pluggable JavaScript Linter

3) 🚧 Data-Driven Engineering Intelligence | Code Climate

4) Code review – Wikipedia


P.S: It has been published as an article in my Linkedin account.

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