diff --git a/JNI/build.sh b/JNI/build.sh
new file mode 100755
index 0000000..282d3bb
--- /dev/null
+++ b/JNI/build.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -e
+gcc -fPIC -shared \
+    -I"$JAVA_HOME/include" \
+    -I"$JAVA_HOME/include/linux" \
+    -o libbtcjni.so native_impl.c
+echo "Built libbtcjni.so"
+
diff --git a/JNI/libbtcjni.so b/JNI/libbtcjni.so
new file mode 100755
index 0000000..df4c67c
Binary files /dev/null and b/JNI/libbtcjni.so differ
diff --git a/JNI/native_impl.c b/JNI/native_impl.c
new file mode 100644
index 0000000..557ca00
--- /dev/null
+++ b/JNI/native_impl.c
@@ -0,0 +1,28 @@
+//native_impl.c
+
+#include <jni.h>
+#include <stdio.h>
+#include <string.h>
+
+// JNI functions for com.example.cezenBTC.service.NativeBridge
+
+JNIEXPORT jstring JNICALL
+Java_com_example_cezenBTC_service_NativeBridge_hello(JNIEnv *env, jclass clazz, jstring jname) {
+    (void)clazz; // unused
+    const char *name = jname ? (*env)->GetStringUTFChars(env, jname, NULL) : "World";
+
+    char buf[256];
+    snprintf(buf, sizeof(buf), "Hello from JNI, %s!", (name && *name) ? name : "World");
+
+    if (jname) {
+        (*env)->ReleaseStringUTFChars(env, jname, name);
+    }
+    return (*env)->NewStringUTF(env, buf);
+}
+
+JNIEXPORT jint JNICALL
+Java_com_example_cezenBTC_service_NativeBridge_add(JNIEnv *env, jclass clazz, jint a, jint b) {
+    (void)env; (void)clazz;
+    return a + b;
+}
+
diff --git a/springHorse/src/main/java/com/example/cezenBTC/config/CezenRoutsSecurityChain.java b/springHorse/src/main/java/com/example/cezenBTC/config/CezenRoutsSecurityChain.java
index 36d8396..7856f1d 100755
--- a/springHorse/src/main/java/com/example/cezenBTC/config/CezenRoutsSecurityChain.java
+++ b/springHorse/src/main/java/com/example/cezenBTC/config/CezenRoutsSecurityChain.java
@@ -109,6 +109,7 @@ public class CezenRoutsSecurityChain {
                                 "/btc/get_races_by_venue_id",
                                 "/btc/get_all_races_by_today",
                                 "/btc/get_race_card",
+                                "/btc/tester",
                                 "/cezen/set_aors",
                                 "/cezen/set_password",
                                 "/cezen/add_extension"
diff --git a/springHorse/src/main/java/com/example/cezenBTC/controller/BtcOperations.java b/springHorse/src/main/java/com/example/cezenBTC/controller/BtcOperations.java
index 954ecd2..ed4b9cc 100644
--- a/springHorse/src/main/java/com/example/cezenBTC/controller/BtcOperations.java
+++ b/springHorse/src/main/java/com/example/cezenBTC/controller/BtcOperations.java
@@ -47,4 +47,10 @@ public class BtcOperations {
 
         return this.btcRaceService.getRaceCard(LocalDate.now());
     }
+
+    @GetMapping("/tester")
+    public ResponseEntity<String> testData(){
+
+        return this.btcRaceService.testConnection();
+    }
 }
diff --git a/springHorse/src/main/java/com/example/cezenBTC/service/BtcRaceService.java b/springHorse/src/main/java/com/example/cezenBTC/service/BtcRaceService.java
index 0cc8233..d545a9a 100644
--- a/springHorse/src/main/java/com/example/cezenBTC/service/BtcRaceService.java
+++ b/springHorse/src/main/java/com/example/cezenBTC/service/BtcRaceService.java
@@ -114,4 +114,13 @@ public class BtcRaceService {
 
         return ResponseEntity.status(200).body(raceCard);
     }
+
+    // this is a JNI test to spring
+    public ResponseEntity<String> testConnection(){
+
+        //jni logic here
+        String msg = NativeBridge.hello("Spring");
+        int sum = NativeBridge.add(21, 21);
+        return ResponseEntity.ok(msg + " | add(21,21)=" + sum);
+    }
 }
diff --git a/springHorse/src/main/java/com/example/cezenBTC/service/NativeBridge.java b/springHorse/src/main/java/com/example/cezenBTC/service/NativeBridge.java
new file mode 100644
index 0000000..a097d48
--- /dev/null
+++ b/springHorse/src/main/java/com/example/cezenBTC/service/NativeBridge.java
@@ -0,0 +1,14 @@
+package com.example.cezenBTC.service;
+
+public final class NativeBridge {
+    public static native String hello(String name);
+    public static native int add(int a, int b);
+
+    static {
+        // ABSOLUTE PATH to the generated library
+        // Linux: libbtcjni.so, macOS: libbtcjni.dylib, Windows: btcjni.dll
+        System.load("/home/mathew/Desktop/dev/horse/JNI_spring/btc_horse/JNI/libbtcjni.so"); // <-- change this to the real path
+    }
+
+    private NativeBridge() {}
+}
\ No newline at end of file