diff --git a/backend/martin-config.yaml b/backend/martin-config.yaml
new file mode 100644
index 0000000..bf25491
--- /dev/null
+++ b/backend/martin-config.yaml
@@ -0,0 +1,53 @@
+listen_addresses: '0.0.0.0:3001'
+
+postgres:
+  connection_string: ${DATABASE_URL}
+
+  tables:
+    planet_osm_polygon:
+      schema: public
+      table: planet_osm_polygon
+      srid: 3857
+      geometry_column: way
+      geometry_type: GEOMETRY
+      minzoom: 4
+      maxzoom: 14
+      bounds: [-180.0, -85.0511, 180.0, 85.0511]
+
+    planet_osm_line:
+      schema: public
+      table: planet_osm_line
+      srid: 3857
+      geometry_column: way
+      geometry_type: GEOMETRY
+      minzoom: 8
+      maxzoom: 14
+      bounds: [-180.0, -85.0511, 180.0, 85.0511]
+
+    planet_osm_point:
+      schema: public
+      table: planet_osm_point
+      srid: 3857
+      geometry_column: way
+      geometry_type: GEOMETRY
+      minzoom: 10
+      maxzoom: 14
+      bounds: [-180.0, -85.0511, 180.0, 85.0511]
+
+    planet_osm_roads:
+      schema: public
+      table: planet_osm_roads
+      srid: 3857
+      geometry_column: way
+      geometry_type: GEOMETRY
+      minzoom: 4
+      maxzoom: 14
+      bounds: [-180.0, -85.0511, 180.0, 85.0511]
+
+  # Composite source: all four layers in a single tile
+  composites:
+    osm_all:
+      - planet_osm_polygon
+      - planet_osm_line
+      - planet_osm_point
+      - planet_osm_roads
\ No newline at end of file