diff --git a/ReactAndroid/src/main/java/com/facebook/react/fabric/Binding.java b/ReactAndroid/src/main/java/com/facebook/react/fabric/Binding.java
index 6854c2106d6..20bb2eca6e9 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/fabric/Binding.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/fabric/Binding.java
@@ -8,6 +8,7 @@
 package com.facebook.react.fabric;
 
 import android.annotation.SuppressLint;
+import androidx.annotation.NonNull;
 import com.facebook.jni.HybridData;
 import com.facebook.proguard.annotations.DoNotStrip;
 import com.facebook.react.bridge.JavaScriptContextHolder;
@@ -40,7 +41,8 @@ public class Binding {
       ComponentFactoryDelegate componentsRegistry,
       Object reactNativeConfig);
 
-  public native void startSurface(int surfaceId, String moduleName, NativeMap initialProps);
+  public native void startSurface(
+      int surfaceId, @NonNull String moduleName, @NonNull NativeMap initialProps);
 
   public native void startSurfaceWithConstraints(
       int surfaceId,
@@ -61,12 +63,12 @@ public class Binding {
       int surfaceId, float minWidth, float maxWidth, float minHeight, float maxHeight);
 
   public void register(
-      JavaScriptContextHolder jsContext,
-      FabricUIManager fabricUIManager,
-      EventBeatManager eventBeatManager,
-      MessageQueueThread jsMessageQueueThread,
-      ComponentFactoryDelegate componentFactoryDelegate,
-      ReactNativeConfig reactNativeConfig) {
+      @NonNull JavaScriptContextHolder jsContext,
+      @NonNull FabricUIManager fabricUIManager,
+      @NonNull EventBeatManager eventBeatManager,
+      @NonNull MessageQueueThread jsMessageQueueThread,
+      @NonNull ComponentFactoryDelegate componentFactoryDelegate,
+      @NonNull ReactNativeConfig reactNativeConfig) {
     fabricUIManager.setBinding(this);
     installFabricUIManager(
         jsContext.get(),
diff --git a/ReactAndroid/src/main/java/com/facebook/react/fabric/ComponentFactoryDelegate.java b/ReactAndroid/src/main/java/com/facebook/react/fabric/ComponentFactoryDelegate.java
index cbbc73de529..28ca0f5adf5 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/fabric/ComponentFactoryDelegate.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/fabric/ComponentFactoryDelegate.java
@@ -7,6 +7,7 @@
 
 package com.facebook.react.fabric;
 
+import androidx.annotation.NonNull;
 import com.facebook.jni.HybridData;
 import com.facebook.proguard.annotations.DoNotStrip;
 
@@ -17,7 +18,7 @@ public class ComponentFactoryDelegate {
     FabricSoLoader.staticInit();
   }
 
-  @DoNotStrip private final HybridData mHybridData;
+  @NonNull @DoNotStrip private final HybridData mHybridData;
 
   @DoNotStrip
   private static native HybridData initHybrid();
diff --git a/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricComponents.java b/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricComponents.java
index 00740289d60..8ee9e4a7263 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricComponents.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricComponents.java
@@ -7,6 +7,7 @@
 
 package com.facebook.react.fabric;
 
+import androidx.annotation.NonNull;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -18,7 +19,7 @@ import java.util.Map;
  */
 public class FabricComponents {
 
-  private static final Map<String, String> sComponentNames = new HashMap<>();
+  private static @NonNull final Map<String, String> sComponentNames = new HashMap<>();
 
   static {
     // TODO T31905686: unify component names between JS - Android - iOS - C++
diff --git a/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricJSIModuleProvider.java b/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricJSIModuleProvider.java
index 59089191141..6dcaaf4de60 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricJSIModuleProvider.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricJSIModuleProvider.java
@@ -7,6 +7,7 @@
 
 package com.facebook.react.fabric;
 
+import androidx.annotation.NonNull;
 import com.facebook.react.bridge.JSIModuleProvider;
 import com.facebook.react.bridge.JavaScriptContextHolder;
 import com.facebook.react.bridge.ReactApplicationContext;
@@ -38,16 +39,16 @@ import com.facebook.systrace.Systrace;
 
 public class FabricJSIModuleProvider implements JSIModuleProvider<UIManager> {
 
-  private final JavaScriptContextHolder mJSContext;
-  private final ReactApplicationContext mReactApplicationContext;
-  private final ComponentFactoryDelegate mComponentFactoryDelegate;
-  private final ReactNativeConfig mConfig;
+  @NonNull private final JavaScriptContextHolder mJSContext;
+  @NonNull private final ReactApplicationContext mReactApplicationContext;
+  @NonNull private final ComponentFactoryDelegate mComponentFactoryDelegate;
+  @NonNull private final ReactNativeConfig mConfig;
 
   public FabricJSIModuleProvider(
-      ReactApplicationContext reactApplicationContext,
-      JavaScriptContextHolder jsContext,
-      ComponentFactoryDelegate componentFactoryDelegate,
-      ReactNativeConfig config) {
+      @NonNull ReactApplicationContext reactApplicationContext,
+      @NonNull JavaScriptContextHolder jsContext,
+      @NonNull ComponentFactoryDelegate componentFactoryDelegate,
+      @NonNull ReactNativeConfig config) {
     mReactApplicationContext = reactApplicationContext;
     mJSContext = jsContext;
     mComponentFactoryDelegate = componentFactoryDelegate;
@@ -79,7 +80,7 @@ public class FabricJSIModuleProvider implements JSIModuleProvider<UIManager> {
     return uiManager;
   }
 
-  private FabricUIManager createUIManager(EventBeatManager eventBeatManager) {
+  private FabricUIManager createUIManager(@NonNull EventBeatManager eventBeatManager) {
     Systrace.beginSection(
         Systrace.TRACE_TAG_REACT_JAVA_BRIDGE, "FabricJSIModuleProvider.createUIManager");
     UIManagerModule nativeModule = mReactApplicationContext.getNativeModule(UIManagerModule.class);
diff --git a/ReactAndroid/src/main/java/com/facebook/react/fabric/GuardedFrameCallback.java b/ReactAndroid/src/main/java/com/facebook/react/fabric/GuardedFrameCallback.java
index d4438155364..0b426c29398 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/fabric/GuardedFrameCallback.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/fabric/GuardedFrameCallback.java
@@ -7,20 +7,21 @@
 
 package com.facebook.react.fabric;
 
+import androidx.annotation.NonNull;
 import com.facebook.react.bridge.NativeModuleCallExceptionHandler;
 import com.facebook.react.bridge.ReactContext;
 import com.facebook.react.modules.core.ChoreographerCompat;
 
 public abstract class GuardedFrameCallback extends ChoreographerCompat.FrameCallback {
 
-  private final NativeModuleCallExceptionHandler mExceptionHandler;
+  @NonNull private final NativeModuleCallExceptionHandler mExceptionHandler;
 
   @Deprecated
-  protected GuardedFrameCallback(ReactContext reactContext) {
+  protected GuardedFrameCallback(@NonNull ReactContext reactContext) {
     this(reactContext.getExceptionHandler());
   }
 
-  protected GuardedFrameCallback(NativeModuleCallExceptionHandler exceptionHandler) {
+  protected GuardedFrameCallback(@NonNull NativeModuleCallExceptionHandler exceptionHandler) {
     mExceptionHandler = exceptionHandler;
   }
 
diff --git a/ReactAndroid/src/main/java/com/facebook/react/fabric/ReactNativeConfig.java b/ReactAndroid/src/main/java/com/facebook/react/fabric/ReactNativeConfig.java
index c0c123b3999..a211cec1f3f 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/fabric/ReactNativeConfig.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/fabric/ReactNativeConfig.java
@@ -7,6 +7,7 @@
 
 package com.facebook.react.fabric;
 
+import androidx.annotation.NonNull;
 import com.facebook.proguard.annotations.DoNotStrip;
 
 // This is a wrapper for the ReactNativeConfig object in C++
@@ -18,7 +19,7 @@ public interface ReactNativeConfig {
    * @param param The string name of the parameter being requested.
    */
   @DoNotStrip
-  boolean getBool(String param);
+  boolean getBool(@NonNull String param);
 
   /**
    * Get an integer param by string name. Default should be 0.
@@ -26,7 +27,7 @@ public interface ReactNativeConfig {
    * @param param The string name of the parameter being requested.
    */
   @DoNotStrip
-  int getInt64(String param);
+  int getInt64(@NonNull String param);
 
   /**
    * Get a string param by string name. Default should be "", empty string.
@@ -34,7 +35,7 @@ public interface ReactNativeConfig {
    * @param param The string name of the parameter being requested.
    */
   @DoNotStrip
-  String getString(String param);
+  String getString(@NonNull String param);
 
   /**
    * Get a double param by string name. Default should be 0.
@@ -42,5 +43,5 @@ public interface ReactNativeConfig {
    * @param param The string name of the parameter being requested.
    */
   @DoNotStrip
-  double getDouble(String param);
+  double getDouble(@NonNull String param);
 }
diff --git a/ReactAndroid/src/main/java/com/facebook/react/fabric/StateWrapperImpl.java b/ReactAndroid/src/main/java/com/facebook/react/fabric/StateWrapperImpl.java
index 65157a1ca2a..2d96776f882 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/fabric/StateWrapperImpl.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/fabric/StateWrapperImpl.java
@@ -8,6 +8,7 @@
 package com.facebook.react.fabric;
 
 import android.annotation.SuppressLint;
+import androidx.annotation.NonNull;
 import com.facebook.jni.HybridData;
 import com.facebook.proguard.annotations.DoNotStrip;
 import com.facebook.react.bridge.NativeMap;
@@ -36,10 +37,10 @@ public class StateWrapperImpl implements StateWrapper {
   @Override
   public native ReadableNativeMap getState();
 
-  public native void updateStateImpl(NativeMap map);
+  public native void updateStateImpl(@NonNull NativeMap map);
 
   @Override
-  public void updateState(WritableMap map) {
+  public void updateState(@NonNull WritableMap map) {
     updateStateImpl((NativeMap) map);
   }
 }