diff --git a/src/adapters/incoming/api_routes.py b/src/adapters/incoming/api_routes.py
index 9b479b6..65c6497 100644
--- a/src/adapters/incoming/api_routes.py
+++ b/src/adapters/incoming/api_routes.py
@@ -65,24 +65,6 @@ def _get_service() -> ITextProcessor:
     return get_processor_service()
 
 
-def _to_domain_strategy(request_strategy) -> ChunkingStrategy:
-    """
-    Convert API request strategy to domain model.
-
-    Args:
-        request_strategy: API request strategy schema
-
-    Returns:
-        ChunkingStrategy: Domain strategy model
-    """
-    return ChunkingStrategy(
-        strategy_name=request_strategy.strategy_name,
-        chunk_size=request_strategy.chunk_size,
-        overlap_size=request_strategy.overlap_size,
-        respect_boundaries=request_strategy.respect_boundaries,
-    )
-
-
 def _to_document_response(document) -> DocumentResponse:
     """
     Convert domain document to API response.
@@ -221,14 +203,14 @@ async def process_file(
         # Pull service from bootstrap
         service: ITextProcessor = _get_service()
 
-        # Create temporary file with appropriate suffix
-        suffix = Path(file.filename).suffix if file.filename else ".tmp"
-        temp_file = tempfile.NamedTemporaryFile(delete=False, suffix=suffix)
-        temp_file_path = Path(temp_file.name)
+        # Create temporary directory and file with original filename
+        temp_dir = tempfile.mkdtemp()
+        original_filename = file.filename if file.filename else "uploaded_file.tmp"
+        temp_file_path = Path(temp_dir) / original_filename
 
         # Copy uploaded file to temporary location
         logger.info(f"Processing uploaded file: {file.filename}")
-        with temp_file:
+        with open(temp_file_path, 'wb') as temp_file:
             shutil.copyfileobj(file.file, temp_file)
 
         # Create chunking strategy
@@ -261,13 +243,14 @@ async def process_file(
             detail=f"Internal server error: {str(e)}",
         )
     finally:
-        # Clean up temporary file
+        # Clean up temporary file and directory
         if temp_file_path and temp_file_path.exists():
             try:
-                temp_file_path.unlink()
-                logger.debug(f"Cleaned up temporary file: {temp_file_path}")
+                temp_dir = temp_file_path.parent
+                shutil.rmtree(temp_dir)
+                logger.debug(f"Cleaned up temporary directory: {temp_dir}")
             except Exception as e:
-                logger.warning(f"Failed to delete temporary file {temp_file_path}: {str(e)}")
+                logger.warning(f"Failed to delete temporary directory: {str(e)}")
 
 
 @router.get(