diff --git a/api/main.py b/api/main.py
index d0b8c79..64dcad3 100644
--- a/api/main.py
+++ b/api/main.py
@@ -1,7 +1,34 @@
-from fastapi import FastAPI
+import logging
+import time
+from fastapi import FastAPI, Request
 from api.routes import templates, forms
+from api.errors.handlers import register_exception_handlers
 
-app = FastAPI()
+logger = logging.getLogger("fireform.api")
+
+app = FastAPI(title="FireForm API", version="1.0.0")
+
+register_exception_handlers(app)
 
 app.include_router(templates.router)
-app.include_router(forms.router)
\ No newline at end of file
+app.include_router(forms.router)
+
+
+@app.middleware("http")
+async def log_requests(request: Request, call_next):
+    start = time.time()
+    response = await call_next(request)
+    duration_ms = (time.time() - start) * 1000
+    logger.info(
+        "%s %s -> %s (%.1fms)",
+        request.method,
+        request.url.path,
+        response.status_code,
+        duration_ms,
+    )
+    return response
+
+
+@app.get("/health", tags=["health"])
+def health_check():
+    return {"status": "ok"}
\ No newline at end of file
diff --git a/src/file_manipulator.py b/src/file_manipulator.py
index b7815cc..ad84f14 100644
--- a/src/file_manipulator.py
+++ b/src/file_manipulator.py
@@ -1,8 +1,11 @@
 import os
 from src.filler import Filler
 from src.llm import LLM
+from src.logger import setup_logger
 from commonforms import prepare_form
 
+logger = setup_logger(__name__)
+
 
 class FileManipulator:
     def __init__(self):
@@ -22,26 +25,23 @@ def fill_form(self, user_input: str, fields: list, pdf_form_path: str):
         It receives the raw data, runs the PDF filling logic,
         and returns the path to the newly created file.
         """
-        print("[1] Received request from frontend.")
-        print(f"[2] PDF template path: {pdf_form_path}")
+        logger.info("Received request from frontend.")
+        logger.info("PDF template path: %s", pdf_form_path)
 
         if not os.path.exists(pdf_form_path):
-            print(f"Error: PDF template not found at {pdf_form_path}")
+            logger.error("PDF template not found at %s", pdf_form_path)
             return None  # Or raise an exception
 
-        print("[3] Starting extraction and PDF filling process...")
+        logger.info("Starting extraction and PDF filling process...")
         try:
             self.llm._target_fields = fields
             self.llm._transcript_text = user_input
             output_name = self.filler.fill_form(pdf_form=pdf_form_path, llm=self.llm)
 
-            print("\n----------------------------------")
-            print("✅ Process Complete.")
-            print(f"Output saved to: {output_name}")
+            logger.info("Process complete. Output saved to: %s", output_name)
 
             return output_name
 
         except Exception as e:
-            print(f"An error occurred during PDF generation: {e}")
-            # Re-raise the exception so the frontend can handle it
+            logger.exception("An error occurred during PDF generation: %s", e)
             raise e
diff --git a/src/llm.py b/src/llm.py
index 70937f9..e49b981 100644
--- a/src/llm.py
+++ b/src/llm.py
@@ -1,6 +1,9 @@
 import json
 import os
 import requests
+from src.logger import setup_logger
+
+logger = setup_logger(__name__)
 
 
 class LLM:
@@ -76,10 +79,9 @@ def main_loop(self):
             # print(parsed_response)
             self.add_response_to_json(field, parsed_response)
 
-        print("----------------------------------")
-        print("\t[LOG] Resulting JSON created from the input text:")
-        print(json.dumps(self._json, indent=2))
-        print("--------- extracted data ---------")
+        logger.info("Resulting JSON created from the input text:")
+        logger.info(json.dumps(self._json, indent=2))
+        logger.debug("--------- extracted data ---------")
 
         return self
 
@@ -115,9 +117,7 @@ def handle_plural_values(self, plural_value):
                 f"Value is not plural, doesn't have ; separator, Value: {plural_value}"
             )
 
-        print(
-            f"\t[LOG]: Formating plural values for JSON, [For input {plural_value}]..."
-        )
+        logger.debug("Formatting plural values for JSON, input: %s", plural_value)
         values = plural_value.split(";")
 
         # Remove trailing leading whitespace
@@ -127,7 +127,7 @@ def handle_plural_values(self, plural_value):
                 clean_value = values[current].lstrip()
                 values[current] = clean_value
 
-        print(f"\t[LOG]: Resulting formatted list of values: {values}")
+        logger.debug("Resulting formatted list of values: %s", values)
 
         return values
 
diff --git a/src/logger.py b/src/logger.py
new file mode 100644
index 0000000..0bf4990
--- /dev/null
+++ b/src/logger.py
@@ -0,0 +1,26 @@
+import logging
+import sys
+
+LOG_FORMAT = "%(asctime)s | %(levelname)-8s | %(name)s | %(message)s"
+DATE_FORMAT = "%Y-%m-%d %H:%M:%S"
+
+
+def setup_logger(name: str = "fireform", level: int = logging.INFO) -> logging.Logger:
+    """
+    Create and return a configured logger.
+
+    Usage:
+        from src.logger import setup_logger
+        logger = setup_logger(__name__)
+        logger.info("Hello from %s", __name__)
+    """
+    logger = logging.getLogger(name)
+
+    # Avoid adding duplicate handlers if called more than once
+    if not logger.handlers:
+        handler = logging.StreamHandler(sys.stdout)
+        handler.setFormatter(logging.Formatter(LOG_FORMAT, datefmt=DATE_FORMAT))
+        logger.addHandler(handler)
+
+    logger.setLevel(level)
+    return logger
diff --git a/src/main.py b/src/main.py
index 5bb632b..9f549fb 100644
--- a/src/main.py
+++ b/src/main.py
@@ -1,8 +1,11 @@
 import os
-# from backend import Fill  
+from typing import Union
 from commonforms import prepare_form 
 from pypdf import PdfReader
 from controller import Controller
+from logger import setup_logger
+
+logger = setup_logger(__name__)
 
 def input_fields(num_fields: int):
     fields = []
@@ -11,39 +14,38 @@ def input_fields(num_fields: int):
         fields.append(field)
     return fields
 
-def run_pdf_fill_process(user_input: str, definitions: list, pdf_form_path: Union[str, os.PathLike]):
+def run_pdf_fill_process(user_input: str, definitions: Union[dict, list], pdf_form_path: Union[str, os.PathLike]):
     """
     This function is called by the frontend server.
     It receives the raw data, runs the PDF filling logic,
     and returns the path to the newly created file.
     """
     
-    print("[1] Received request from frontend.")
-    print(f"[2] PDF template path: {pdf_form_path}")
+    logger.info("Received request from frontend.")
+    logger.info("PDF template path: %s", pdf_form_path)
     
     # Normalize Path/PathLike to a plain string for downstream code
     pdf_form_path = os.fspath(pdf_form_path)
     
     if not os.path.exists(pdf_form_path):
-        print(f"Error: PDF template not found at {pdf_form_path}")
+        logger.error("PDF template not found at %s", pdf_form_path)
         return None # Or raise an exception
 
-    print("[3] Starting extraction and PDF filling process...")
+    logger.info("Starting extraction and PDF filling process...")
     try:
-        output_name = Fill.fill_form(
+        controller = Controller()
+        output_name = controller.fill_form(
             user_input=user_input,
-            definitions=definitions,
-            pdf_form=pdf_form_path
+            fields=definitions,
+            pdf_form_path=pdf_form_path
         )
         
-        print("\n----------------------------------")
-        print(f"✅ Process Complete.")
-        print(f"Output saved to: {output_name}")
+        logger.info("Process complete. Output saved to: %s", output_name)
         
         return output_name
         
     except Exception as e:
-        print(f"An error occurred during PDF generation: {e}")
+        logger.exception("An error occurred during PDF generation: %s", e)
         # Re-raise the exception so the frontend can handle it
         raise e