diff --git a/docker/server/Dockerfile b/docker/server/Dockerfile
index d759da8340..6c8df9f04b 100644
--- a/docker/server/Dockerfile
+++ b/docker/server/Dockerfile
@@ -4,7 +4,9 @@
 # ===========================================================================================================
 # 0. Builder stage 1
 # ===========================================================================================================
-FROM azul/zulu-openjdk-debian:17 AS builder
+# The Gradle build produces an architecture-neutral JAR, so keep it on the
+# native build platform instead of running it through QEMU for ARM64 images.
+FROM --platform=$BUILDPLATFORM azul/zulu-openjdk-debian:17 AS builder
 
 ARG INDEXING_BACKEND=elasticsearch
 
@@ -26,7 +28,8 @@ RUN ls -ltr
 # ===========================================================================================================
 # 1. Builder stage 2
 # ===========================================================================================================
-FROM alpine:3.20 AS ui-builder
+# The UI build also produces architecture-neutral static assets.
+FROM --platform=$BUILDPLATFORM alpine:3.20 AS ui-builder
 ARG YARN_OPTS
 
 LABEL maintainer="Orkes OSS <oss@orkes.io>"