diff --git a/apps/api/Dockerfile b/apps/api/Dockerfile
index 00c84ce..43535d2 100644
--- a/apps/api/Dockerfile
+++ b/apps/api/Dockerfile
@@ -1,3 +1,6 @@
+# syntax=docker/dockerfile:1
+# Enable BuildKit features for cache mounts
+
 # Base image for all stages
 FROM node:20-alpine AS base
 
@@ -22,8 +25,9 @@ COPY packages/ui/package.json ./packages/ui/
 COPY packages/config/package.json ./packages/config/
 COPY apps/api/package.json ./apps/api/
 
-# Install dependencies
-RUN pnpm install --frozen-lockfile
+# Install dependencies with pnpm store cache
+RUN --mount=type=cache,id=pnpm-store,target=/root/.local/share/pnpm/store \
+    pnpm install --frozen-lockfile
 
 # ======================
 # Builder stage
@@ -41,7 +45,9 @@ COPY apps/api ./apps/api
 
 # Build the API app and its dependencies using TurboRepo
 # This ensures @mosaic/shared is built first, then prisma:generate, then the API
-RUN pnpm turbo build --filter=@mosaic/api
+# Cache TurboRepo build outputs for faster subsequent builds
+RUN --mount=type=cache,id=turbo-cache,target=/app/.turbo \
+    pnpm turbo build --filter=@mosaic/api
 
 # ======================
 # Production stage
diff --git a/apps/web/Dockerfile b/apps/web/Dockerfile
index 8134b73..8da6c1f 100644
--- a/apps/web/Dockerfile
+++ b/apps/web/Dockerfile
@@ -1,3 +1,6 @@
+# syntax=docker/dockerfile:1
+# Enable BuildKit features for cache mounts
+
 # Base image for all stages
 FROM node:20-alpine AS base
 
@@ -22,8 +25,9 @@ COPY packages/ui/package.json ./packages/ui/
 COPY packages/config/package.json ./packages/config/
 COPY apps/web/package.json ./apps/web/
 
-# Install dependencies
-RUN pnpm install --frozen-lockfile
+# Install dependencies with pnpm store cache
+RUN --mount=type=cache,id=pnpm-store,target=/root/.local/share/pnpm/store \
+    pnpm install --frozen-lockfile
 
 # ======================
 # Builder stage
@@ -45,7 +49,9 @@ ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
 
 # Build the web app and its dependencies using TurboRepo
 # This ensures @mosaic/shared and @mosaic/ui are built first
-RUN pnpm turbo build --filter=@mosaic/web
+# Cache TurboRepo build outputs for faster subsequent builds
+RUN --mount=type=cache,id=turbo-cache,target=/app/.turbo \
+    pnpm turbo build --filter=@mosaic/web
 
 # Ensure public directory exists (may be empty)
 RUN mkdir -p ./apps/web/public