diff --git a/Dockerfile b/Dockerfile
index c25cd371c..21ca73c91 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,41 +1,36 @@
-# Build Stage
-FROM golang:1.23-alpine AS base
+# Runtime base (shared across all drivers): OS + Java + JAR + destination specs
+FROM alpine:3.18 AS runtime-base
 
-WORKDIR /home/app
-COPY . .
+RUN apk add --no-cache openjdk17
+
+# Copy the pre-built JAR and destination specs (these rarely change)
+COPY destination/iceberg/olake-iceberg-java-writer/target/olake-iceberg-java-writer-0.0.1-SNAPSHOT.jar /home/olake-iceberg-java-writer.jar
+COPY destination/iceberg/resources/spec.json /destination/iceberg/resources/spec.json
+COPY destination/parquet/resources/spec.json /destination/parquet/resources/spec.json
+
+WORKDIR /home
+
+# Build the Go driver binary (driver-specific)
+FROM golang:1.23-alpine AS builder
 
 ARG DRIVER_NAME=olake
-# Build the Go binary
+WORKDIR /home/app
+COPY . .
 WORKDIR /home/app/drivers/${DRIVER_NAME}
 RUN go build -o /olake main.go
 
-# Final Runtime Stage
-FROM alpine:3.18
-
-# Install Java 17 instead of Java 11
-RUN apk add --no-cache openjdk17
-
-# Copy the binary from the build stage
-COPY --from=base /olake /home/olake
+# Final image: reuse runtime base, then add only driver-specific layers
+FROM runtime-base
 
 ARG DRIVER_VERSION=dev
 ARG DRIVER_NAME=olake
 
-# Copy the pre-built JAR file from Maven
-# First try to copy from the source location (works after Maven build)
-COPY destination/iceberg/olake-iceberg-java-writer/target/olake-iceberg-java-writer-0.0.1-SNAPSHOT.jar /home/olake-iceberg-java-writer.jar
-
-# Copy the spec files for driver and destinations
-COPY --from=base /home/app/drivers/${DRIVER_NAME}/resources/spec.json /drivers/${DRIVER_NAME}/resources/spec.json
-COPY --from=base /home/app/destination/iceberg/resources/spec.json /destination/iceberg/resources/spec.json
-COPY --from=base /home/app/destination/parquet/resources/spec.json /destination/parquet/resources/spec.json
+COPY --from=builder /olake /home/olake
+COPY drivers/${DRIVER_NAME}/resources/spec.json /drivers/${DRIVER_NAME}/resources/spec.json
 
-# Metadata
 LABEL io.eggwhite.version=${DRIVER_VERSION}
 LABEL io.eggwhite.name=olake/source-${DRIVER_NAME}
 
-# Set working directory
 WORKDIR /home
 
-# Entrypoint
 ENTRYPOINT ["./olake"]
\ No newline at end of file
diff --git a/release-tool.sh b/release-tool.sh
index e2b2203bb..dc31908dd 100644
--- a/release-tool.sh
+++ b/release-tool.sh
@@ -28,15 +28,44 @@ function chalk() {
 # Function to build the Java project with Maven
 function build_java_project() {
     echo "Building Java project with Maven..."
+    # Use a fixed timestamp based on the last Java source change for reproducible JARs
+    local MODULE_DIR="destination/iceberg/olake-iceberg-java-writer"
+    local MODULE_SRC_DIR="${MODULE_DIR}/src"
+    export SOURCE_DATE_EPOCH="$(git log -1 --format=%ct -- "${MODULE_SRC_DIR}")"
     # Change to the directory containing the POM file
-    cd destination/iceberg/olake-iceberg-java-writer || fail "Failed to change to Maven project directory"
+    cd "${MODULE_DIR}" || fail "Failed to change to Maven project directory"
     echo "Building Maven project in $(pwd)"
-    mvn clean package -Dmaven.test.skip=true || fail "Maven build failed"
+    mvn clean package -Dmaven.test.skip=true -Dproject.build.outputTimestamp="${SOURCE_DATE_EPOCH}" || fail "Maven build failed"
+    # Record commit that produced this JAR for safe reuse decisions
+    local CURRENT_MODULE_COMMIT
+    CURRENT_MODULE_COMMIT="$(git log -1 --format=%H -- "${MODULE_SRC_DIR}")"
+    echo -n "$CURRENT_MODULE_COMMIT" > target/.built-commit
     # Return to the original directory
     cd - || fail "Failed to return to original directory"
     echo "$(chalk green "✅ Java project successfully built")"
 }
 
+# Build the JAR only if a prebuilt artifact isn't already present (enables sharing across jobs)
+function ensure_java_jar() {
+    local MODULE_DIR="destination/iceberg/olake-iceberg-java-writer"
+    local MODULE_SRC_DIR="${MODULE_DIR}/src"
+    local jar_path="${MODULE_DIR}/target/olake-iceberg-java-writer-0.0.1-SNAPSHOT.jar"
+    local built_commit_file="${MODULE_DIR}/target/.built-commit"
+    local current_module_commit
+    current_module_commit="$(git log -1 --format=%H -- "${MODULE_SRC_DIR}")"
+
+    if [[ -f "$jar_path" && -s "$jar_path" && -f "$built_commit_file" ]]; then
+        local built_commit
+        built_commit="$(cat "$built_commit_file" 2>/dev/null || echo)"
+        if [[ "$built_commit" == "$current_module_commit" ]]; then
+            echo "Using prebuilt JAR: $jar_path (commit $built_commit)"
+            return 0
+        fi
+        echo "Java sources changed since last build ($built_commit -> $current_module_commit); rebuilding JAR"
+    fi
+    build_java_project
+}
+
 # Function to fail with a message
 function fail() {
     local error="${1:-Unknown error}"
@@ -138,7 +167,7 @@ connector=$DRIVER
 type="source"
 
 
-# Build Java project
-build_java_project
+# Build Java project (or reuse prebuilt artifact if present)
+ensure_java_jar
 
 release "$VERSION" "$platform" "$CURRENT_BRANCH"
\ No newline at end of file