diff --git a/my-app/utils/resume_analysis.py b/my-app/utils/resume_analysis.py
index 73db7ed..73bea1b 100755
--- a/my-app/utils/resume_analysis.py
+++ b/my-app/utils/resume_analysis.py
@@ -21,11 +21,15 @@ load_dotenv()
 # Configuration
 OPENROUTER_API_KEY = os.getenv("OPENROUTER_API_KEY")
 if not OPENROUTER_API_KEY:
-    raise ValueError("OPENROUTER_API_KEY environment variable is required")
+    # Use logger here if possible, but it might not be configured yet.
+    # Consider raising the error later or logging after basicConfig.
+    print("ERROR: OPENROUTER_API_KEY environment variable is required", file=sys.stderr)
+    sys.exit(1)
 
 OPENROUTER_MODEL_NAME = os.getenv("OPENROUTER_MODEL_NAME")
 if not OPENROUTER_MODEL_NAME:
-    raise ValueError("OPENROUTER_MODEL_NAME environment variable is required")
+    print("ERROR: OPENROUTER_MODEL_NAME environment variable is required", file=sys.stderr)
+    sys.exit(1)
 
 MAX_TOKENS = int(os.getenv("MAX_TOKENS", 500))
 USE_MOCKUP = os.getenv("USE_MOCKUP", "false").lower() == "true"
@@ -43,37 +47,48 @@ logging.basicConfig(
     format="[%(asctime)s] [%(name)s] [%(levelname)s] %(message)s",
     datefmt="%Y-%m-%dT%H:%M:%S%z",
 )
+logger = logging.getLogger(__name__) # Define logger earlier
 
-logger = logging.getLogger(__name__)
+# Global variable to hold the client instance
+_opernrouter_client_instance = None
 
-# Initialize OpenRouter client
-logger.info("Initializing OpenRouter client...")
-logger.debug(f"Using model: {OPENROUTER_MODEL_NAME}")
-logger.debug("API Key present and valid format: %s", bool(OPENROUTER_API_KEY and OPENROUTER_API_KEY.startswith("sk-or-v1-")))
+def get_opernrouter_client():
+    """
+    Initializes and returns the OpenRouter client instance (lazy initialization).
+    Ensures the client is initialized only once.
+    """
+    global _opernrouter_client_instance
+    if _opernrouter_client_instance is None:
+        logger.info("Initializing OpenRouter client for the first time...")
+        logger.debug(f"Using model: {OPENROUTER_MODEL_NAME}")
+        logger.debug("API Key present and valid format: %s", bool(OPENROUTER_API_KEY and OPENROUTER_API_KEY.startswith("sk-or-v1-")))
+        try:
+            _opernrouter_client_instance = initialize_openrouter_client(
+                api_key=OPENROUTER_API_KEY,
+                model_name=OPENROUTER_MODEL_NAME
+            )
+            logger.info(f"Successfully initialized OpenRouter client with model: {OPENROUTER_MODEL_NAME}")
+        except ValueError as e:
+            logger.error(f"Configuration error during client initialization: {e}")
+            # Re-raise or handle appropriately, maybe return None or raise specific error
+            raise  # Re-raise the ValueError to be caught higher up if needed
+        except Exception as e:
+            logger.error(f"Failed to initialize OpenRouter client: {e}", exc_info=True)
+            # Re-raise or handle appropriately
+            raise # Re-raise the exception
+    else:
+        logger.debug("Returning existing OpenRouter client instance.")
+    return _opernrouter_client_instance
 
-try:
-    llm_client = initialize_openrouter_client(
-        api_key=OPENROUTER_API_KEY,
-        model_name=OPENROUTER_MODEL_NAME
-    )
-    logger.info(f"Successfully initialized OpenRouter client with model: {OPENROUTER_MODEL_NAME}")
-except ValueError as e:
-    logger.error(f"Configuration error: {e}")
-    sys.exit(1)
-except Exception as e:
-    logger.error(f"Failed to initialize OpenRouter client: {e}", exc_info=True)
-    sys.exit(1)
 
 def get_mongo_collection():
     """Initialize and return MongoDB collection."""
+    # Consider lazy initialization for MongoDB as well if beneficial
     mongo_client = pymongo.MongoClient(MONGODB_URI)
     db = mongo_client[MONGODB_DATABASE]
     return db[MONGO_COLLECTION_NAME]
 
 
-logger = logging.getLogger(__name__)
-
-
 def parse_arguments():
     """Parses command line arguments."""
     parser = argparse.ArgumentParser(
@@ -158,7 +173,7 @@ def save_processing_data(resume_text, summary, response, args, processing_id, us
 def get_cv_summary_from_response(response):
     """Extracts CV summary from LLM response."""
     if response and hasattr(response, "choices"):
-        message_content = response.choices[0].message.content
+        message_content = response.choices[0]['message']['content']
         try:
             summary = json.loads(message_content)
         except json.JSONDecodeError as e:
@@ -242,12 +257,19 @@ def call_llm_api(text: str, use_mockup: bool) -> Optional[OpenRouterResponse]:
         # Call OpenRouter API
         logger.info(f"Calling OpenRouter API with model: {OPENROUTER_MODEL_NAME}")
         logger.debug(f"Max tokens set to: {MAX_TOKENS}")
-        
-        response = llm_client.create_chat_completion(
+
+        # Get the client instance (initializes on first call)
+        try:
+            client = get_opernrouter_client()
+        except Exception as e:
+             logger.error(f"Failed to get OpenRouter client: {e}")
+             return None # Cannot proceed without a client
+
+        response = client.create_chat_completion(
             messages=messages,
             max_tokens=MAX_TOKENS
         )
-        
+
         # Validate response
         if not response.choices:
             logger.warning("API response contains no choices")
@@ -302,8 +324,10 @@ def write_llm_response(
         
         # Generate unique file path
         processing_id = str(uuid.uuid4())
+        now = datetime.now()
+        timestamp_str = now.strftime("%Y%m%d_%H%M%S")
         file_path = os.path.join(
-            output_dir, f"{base_filename}_llm_response_{processing_id}"
+            output_dir, f"{base_filename}_llm_response_{timestamp_str}_{processing_id}"
         ) + ".json"
 
         # Prepare serializable response