diff --git a/heatmap-tool/backend/Dockerfile b/heatmap-tool/backend/Dockerfile
index 23677cdc..2ff8bdc2 100644
--- a/heatmap-tool/backend/Dockerfile
+++ b/heatmap-tool/backend/Dockerfile
@@ -1,19 +1,19 @@
 # --- STAGE 1: Builder ---
-FROM python:3.9-slim AS builder
+FROM python:3.11-slim AS builder
 
 WORKDIR /app
 
 # Install system dependencies needed for building
 RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential \
-    && rm -rf /var/lib/apt/lists/*
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # Install dependencies into a local directory
 COPY requirements.txt .
 RUN pip install --user --no-cache-dir -r requirements.txt
 
 # --- STAGE 2: Runtime ---
-FROM python:3.9-slim
+FROM python:3.11-slim
 
 WORKDIR /app
 
diff --git a/lead-engine/Dockerfile b/lead-engine/Dockerfile
index 91e0d9ad..03c58d92 100644
--- a/lead-engine/Dockerfile
+++ b/lead-engine/Dockerfile
@@ -1,15 +1,31 @@
-FROM python:3.9-slim
-
+# --- STAGE 1: Builder ---
+FROM python:3.11-slim AS builder
 WORKDIR /app
 
-COPY . .
+# Install build dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
 
-# Install dependencies required for ingestion and DB
-RUN pip install streamlit pandas requests python-dotenv fastapi "uvicorn[standard]" msal
+# Install python dependencies
+COPY requirements.txt .
+RUN pip install --user --no-cache-dir -r requirements.txt
+
+# --- STAGE 2: Runtime ---
+FROM python:3.11-slim
+WORKDIR /app
+
+# Copy installed packages
+COPY --from=builder /root/.local /root/.local
+ENV PATH=/root/.local/bin:$PATH
+
+# Copy app code
+COPY . .
 
 ENV PYTHONUNBUFFERED=1
 EXPOSE 8501
 EXPOSE 8004
+
 # Start monitor in background and streamlit in foreground
 CMD ["sh", "-c", "python monitor.py & streamlit run app.py --server.port=8501 --server.address=0.0.0.0"]
 
diff --git a/lead-engine/requirements.txt b/lead-engine/requirements.txt
new file mode 100644
index 00000000..50608512
--- /dev/null
+++ b/lead-engine/requirements.txt
@@ -0,0 +1,7 @@
+streamlit
+pandas
+requests
+python-dotenv
+fastapi
+uvicorn[standard]
+msal
\ No newline at end of file
diff --git a/transcription-tool/Dockerfile b/transcription-tool/Dockerfile
index 0717edcb..2bdc7993 100644
--- a/transcription-tool/Dockerfile
+++ b/transcription-tool/Dockerfile
@@ -6,19 +6,25 @@ RUN npm install
 COPY frontend/ ./
 RUN npm run build
 
-# --- STAGE 2: Backend & Runtime ---
+# --- STAGE 2: Backend Builder ---
+FROM python:3.11-slim AS backend-builder
+WORKDIR /app
+RUN apt-get update && apt-get install -y --no-install-recommends build-essential && rm -rf /var/lib/apt/lists/*
+COPY backend/requirements.txt .
+RUN pip install --user --no-cache-dir -r requirements.txt
+
+# --- STAGE 3: Final Runtime ---
 FROM python:3.11-slim
 WORKDIR /app
 
 # System Dependencies (FFmpeg ist essenziell)
-RUN apt-get update && apt-get install -y \
+RUN apt-get update && apt-get install -y --no-install-recommends \
     ffmpeg \
-    build-essential \
-    && rm -rf /var/lib/apt/lists/*
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
-# Copy Requirements & Install
-COPY backend/requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+# Copy Installed Packages
+COPY --from=backend-builder /root/.local /root/.local
+ENV PATH=/root/.local/bin:$PATH
 
 # Copy Built Frontend from Stage 1
 COPY --from=frontend-builder /build/dist /frontend_static
@@ -34,4 +40,4 @@ ENV PYTHONUNBUFFERED=1
 EXPOSE 8001
 
 # Start FastAPI
-CMD ["uvicorn", "backend.app:app", "--host", "0.0.0.0", "--port", "8001", "--reload"]
\ No newline at end of file
+CMD ["uvicorn", "backend.app:app", "--host", "0.0.0.0", "--port", "8001"]
\ No newline at end of file