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React Native Code Review and Consulting Services

 Consult your React Native apps and review the code with us to deliver bug-free apps

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Not only does Callstack have tremendously talented engineers, but I know they care about the success of the project as much as I do. Having a true partner is a wonderful experience and gives us the ability to move so much faster than we could without them.

TC Davis

Code review
& consulting

When it’s good to ask for React and React Native consulting services:

Case 1
Review before passing the code to the production

Find and fix bugs during the coding process. It’s faster, cheaper, and requires fewer developers to do it.

Case 2
Optimization of the existing app

When an application works too slow or gets down (even for a few minutes), it can damage users’ satisfaction and decrease the revenue. To avoid such situations, review the code to find areas for improvement.

Case 3
Little experience with React Native

When developing a React Native app as a beginner, it’s good to have an experienced consultant by your side. Let them review your work and give your team an opportunity to learn from the experts.

Case 4
Poor app quality

Somebody developed an app for you but it doesn’t meet your expectations and the quality of the final product is really low.

Case 5
Something doesn’t work but you don’t know why

A specific element of your app doesn’t work and you don’t know where the problem is and how to fix it.

Why is it important?

Code consulting and review is more than just a bug check. It helps to:

Minimize mistakes and their impact on the project
Ensure that the project requirements are fulfilled
Improve overall code quality
Achieve consistent design and implementation

Technological Benefits

Better code quality

Let more experienced people review your work, suggest the best programming practices and implement them into the project.

Improved code readability

It’s possible that different developers will read your code in the future. Reduce unnecessary pieces of it to make it shorter and more expressive.

Bugs reduction

Eliminate the number of bugs before passing the code to production.

Hire React Native Consultants

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Business benefits

Lower cost of fixing bugs

The faster you find the bug, the cheaper you can fix it. If the bug is spotted during the development process, it’s easier and cheaper to remove it.

Opportunity for juniors to develop skills

Help your junior developers extend their knowledge by giving them the opportunity to cooperate with more experienced developers.

Why work with us?

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Experienced in working on demanding React & React Native projects

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Creators and maintainers of many Open Source libraries used by millions

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Core Contributors to React Native and official Facebook partners

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Organizers of the biggest React Native conference - React Native EU

How do we work?

We offer flexible solutions adjusted to your needs. Our process is crafted to fit small and enterprise clients.

We join your team, dive into your project and tell you what we can do together. Our partnership model of collaboration can be broken down into six steps:

How it looks in practice


Initial call

We set up an initial call to understand your application and learn about the issues you have.



Based on the initial call, we prepare a proposal and assign you a developer that best suits your needs in terms of skills and knowledge.


Research phase

We become your team members to learn everything about your project and organization. We join your meetings, chat with your programmers to look at the project from your perspective.


Pair-programming and knowledge sharing

We cooperate with your developers on your project and share our knowledge with them at the same time. 


Report with measurable improvements

At the end of the first month, we present you a report with our recommendations based on the research described in Step 3.You decide if you want to continue the cooperation or implement what we recommend yourself.


Further cooperation and support

Once you decide to continue the cooperation, we will implement the recommendations and support your further efforts. We will be happy to guide you through your next steps. You can always count on our expertise.

I would have no hesitation in recommending Callstack to others, to provide a flexible solution to an existing workforce or on a longer-term basis as part of a remote team.

Ben Caulfield
CEO & Co-founder @ Eedi


Let's work together!

Need help with React or React Native? Let us know!

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