diff --git a/app/core/filter.py b/app/core/filter.py
new file mode 100644
index 0000000..5f49112
--- /dev/null
+++ b/app/core/filter.py
@@ -0,0 +1,14 @@
+# core/filter.py
+
+KEYWORDS = ["NAS", "SSD", "Router", "Switch", "Server", "Synology"]
+
+def filter_deals(deals):
+    filtered = []
+
+    for d in deals:
+        title = d["title"].lower()
+
+        if any(k.lower() in title for k in KEYWORDS):
+            filtered.append(d)
+
+    return filtered
\ No newline at end of file