diff --git a/.github/workflows/build-firmware.yaml b/.github/workflows/build-firmware.yaml
new file mode 100644
index 0000000..bb18d05
--- /dev/null
+++ b/.github/workflows/build-firmware.yaml
@@ -0,0 +1,16 @@
+name: Firmware at GHA
+
+on: [ push, pull_request ]
+
+jobs:
+  build-firmware:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: 1. Compile
+        run: |
+          bash compile.sh
diff --git a/compile.sh b/compile.sh
new file mode 100644
index 0000000..e3c5cd8
--- /dev/null
+++ b/compile.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+# todo: remove 'atlas' part once we have https://github.com/rusefi/rusefi/issues/5284
+cd ext/rusefi/firmware/config/boards/atlas
+
+bash ../common_make.sh ../../../../.. custom_platform
diff --git a/signature_AT32F435.h b/signature_AT32F435.h
new file mode 100644
index 0000000..4e22935
--- /dev/null
+++ b/signature_AT32F435.h
@@ -0,0 +1,2 @@
+#define SIGNATURE_HASH 1
+#define TS_SIGNATURE "rusEFI AT32F435"