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    <title>DEV Community: Fouzia Naaz</title>
    <description>The latest articles on DEV Community by Fouzia Naaz (@fouzia_naaz).</description>
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      <title>How I Structure Scalable React Native Apps Using MVVM</title>
      <dc:creator>Fouzia Naaz</dc:creator>
      <pubDate>Mon, 20 Apr 2026 12:34:10 +0000</pubDate>
      <link>https://dev.to/fouzia_naaz/how-i-structure-scalable-react-native-apps-using-mvvm-5dn0</link>
      <guid>https://dev.to/fouzia_naaz/how-i-structure-scalable-react-native-apps-using-mvvm-5dn0</guid>
      <description>&lt;p&gt;As React Native apps grow, one problem becomes unavoidable:&lt;br&gt;
things start getting messy.&lt;/p&gt;

&lt;p&gt;What begins as a simple component structure slowly turns into:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;tightly coupled logic&lt;/li&gt;
&lt;li&gt;hard-to-maintain screens&lt;/li&gt;
&lt;li&gt;unpredictable state handling&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;I ran into this while working on production apps, and that’s when I started adopting a more structured approach: MVVM (Model–View–ViewModel).&lt;/p&gt;
&lt;h2&gt;
  
  
  Why React Native Apps Become Hard to Scale
&lt;/h2&gt;

&lt;p&gt;In many projects, logic ends up inside components:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;API calls&lt;/li&gt;
&lt;li&gt;business logic&lt;/li&gt;
&lt;li&gt;state transformations&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;This creates:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;poor readability&lt;/li&gt;
&lt;li&gt;difficult testing&lt;/li&gt;
&lt;li&gt;repeated logic across screens&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;The bigger the app gets, the worse it becomes.&lt;/p&gt;
&lt;h2&gt;
  
  
  What MVVM Solves
&lt;/h2&gt;

&lt;p&gt;MVVM separates responsibilities:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Model → data layer (API, storage, types)&lt;/li&gt;
&lt;li&gt;View → UI components&lt;/li&gt;
&lt;li&gt;ViewModel → business logic + state handling&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;This separation helps keep your UI clean and your logic reusable.&lt;/p&gt;
&lt;h2&gt;
  
  
  My Folder Structure
&lt;/h2&gt;

&lt;p&gt;Here’s how I typically organize a feature:&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight plaintext"&gt;&lt;code&gt;/features
  /user
    UserView.tsx
    useUserViewModel.ts
    userModel.ts
    userService.ts
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;ul&gt;
&lt;li&gt;View handles rendering&lt;/li&gt;
&lt;li&gt;ViewModel manages logic&lt;/li&gt;
&lt;li&gt;Model/Service handles data&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;Example: View vs ViewModel&lt;/p&gt;

&lt;p&gt;View (UI only)&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight tsx"&gt;&lt;code&gt;&lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;UserView&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;user&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;loading&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;fetchUser&lt;/span&gt; &lt;span class="p"&gt;}&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;useUserViewModel&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;

&lt;span class="nf"&gt;useEffect&lt;/span&gt;&lt;span class="p"&gt;(()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nf"&gt;fetchUser&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
  &lt;span class="p"&gt;},&lt;/span&gt; &lt;span class="p"&gt;[]);&lt;/span&gt;
  &lt;span class="k"&gt;if &lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;loading&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="p"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nc"&gt;Loader&lt;/span&gt; &lt;span class="p"&gt;/&amp;gt;;&lt;/span&gt;
  &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="p"&gt;&amp;lt;&lt;/span&gt;&lt;span class="nc"&gt;Text&lt;/span&gt;&lt;span class="p"&gt;&amp;gt;&lt;/span&gt;&lt;span class="si"&gt;{&lt;/span&gt;&lt;span class="nx"&gt;user&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="nx"&gt;name&lt;/span&gt;&lt;span class="si"&gt;}&lt;/span&gt;&lt;span class="p"&gt;&amp;lt;/&lt;/span&gt;&lt;span class="nc"&gt;Text&lt;/span&gt;&lt;span class="p"&gt;&amp;gt;;&lt;/span&gt;
&lt;span class="p"&gt;};&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;p&gt;ViewModel (logic)&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight js-code-highlight"&gt;
&lt;pre class="highlight typescript"&gt;&lt;code&gt;&lt;span class="k"&gt;export&lt;/span&gt; &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;useUserViewModel&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
  &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;user&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;setUser&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;useState&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="kc"&gt;null&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
  &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="nx"&gt;loading&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;setLoading&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nf"&gt;useState&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="kc"&gt;false&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;

  &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;fetchUser&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;async &lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;=&amp;gt;&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt;
    &lt;span class="nf"&gt;setLoading&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="kc"&gt;true&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="kd"&gt;const&lt;/span&gt; &lt;span class="nx"&gt;data&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="k"&gt;await&lt;/span&gt; &lt;span class="nf"&gt;getUser&lt;/span&gt;&lt;span class="p"&gt;();&lt;/span&gt;
    &lt;span class="nf"&gt;setUser&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nx"&gt;data&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
    &lt;span class="nf"&gt;setLoading&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="kc"&gt;false&lt;/span&gt;&lt;span class="p"&gt;);&lt;/span&gt;
  &lt;span class="p"&gt;};&lt;/span&gt;
  &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="p"&gt;{&lt;/span&gt; &lt;span class="nx"&gt;user&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;loading&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nx"&gt;fetchUser&lt;/span&gt; &lt;span class="p"&gt;};&lt;/span&gt;
&lt;span class="p"&gt;};&lt;/span&gt;

&lt;/code&gt;&lt;/pre&gt;

&lt;/div&gt;



&lt;h2&gt;
  
  
  Why This Works Well in Production
&lt;/h2&gt;

&lt;ul&gt;
&lt;li&gt;Easier to test logic separately&lt;/li&gt;
&lt;li&gt;Reusable business logic&lt;/li&gt;
&lt;li&gt;Cleaner UI components&lt;/li&gt;
&lt;li&gt;Better team collaboration&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;Most importantly:&lt;/p&gt;

&lt;p&gt;You stop rewriting the same logic in multiple places&lt;/p&gt;

&lt;h2&gt;
  
  
  How It Fits with Redux
&lt;/h2&gt;

&lt;p&gt;If you’re using Redux:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;Keep global state in Redux&lt;/li&gt;
&lt;li&gt;Keep screen-specific logic in ViewModels&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;This avoids overloading Redux with unnecessary complexity.&lt;/p&gt;

&lt;h2&gt;
  
  
  Common Mistakes to Avoid
&lt;/h2&gt;

&lt;ul&gt;
&lt;li&gt;Putting everything into Redux&lt;/li&gt;
&lt;li&gt;Mixing UI and business logic&lt;/li&gt;
&lt;li&gt;Over-engineering small features&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;MVVM should simplify your app — not complicate it.&lt;/p&gt;

&lt;h2&gt;
  
  
  Final Thoughts
&lt;/h2&gt;

&lt;p&gt;React Native doesn’t enforce architecture, which is both a strength and a weakness.&lt;/p&gt;

&lt;p&gt;If you don’t define structure early, scaling becomes painful.&lt;/p&gt;

&lt;p&gt;For me, MVVM has been a simple and effective way to:&lt;/p&gt;

&lt;ul&gt;
&lt;li&gt;organize code&lt;/li&gt;
&lt;li&gt;improve maintainability&lt;/li&gt;
&lt;li&gt;build more predictable apps&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;It’s not the only approach — but it’s one that works well in real-world projects.&lt;/p&gt;

</description>
      <category>ai</category>
      <category>webdev</category>
      <category>programming</category>
      <category>javascript</category>
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