diff --git a/src/olympia/lib/settings_base.py b/src/olympia/lib/settings_base.py
index 16767d0942a1..6930fa32214e 100644
--- a/src/olympia/lib/settings_base.py
+++ b/src/olympia/lib/settings_base.py
@@ -1557,3 +1557,5 @@ def read_only_mode(env):
 SWAGGER_SCHEMA_FILE = path('schema.yml')
 
 SWAGGER_UI_ENABLED = env('SWAGGER_UI_ENABLED', default=False) or TARGET != 'production'
+
+SOURCE_BUILDER_VIEWER_URL = env('SOURCE_BUILDER_VIEWER_URL', default=None)
diff --git a/src/olympia/reviewers/templates/reviewers/includes/version.html b/src/olympia/reviewers/templates/reviewers/includes/version.html
index c1901f2ceb8b..5453182c0497 100644
--- a/src/olympia/reviewers/templates/reviewers/includes/version.html
+++ b/src/olympia/reviewers/templates/reviewers/includes/version.html
@@ -57,6 +57,12 @@ <h5>Average Daily Users:</h5>
               {% else %}
                   The developer has provided source code.
               {% endif %}
+              {% if waffle.switch('enable-source-builder') %}
+                  &nbsp;|&nbsp;
+                  <a href="{{ settings.SOURCE_BUILDER_VIEWER_URL }}?addon_id={{ addon.pk }}&version_id={{ version.pk }}"
+                     class="source-builder"
+                     target="_blank" rel="noopener noreferrer">Source Builder</a>
+              {% endif %}
           </div>
       {% endif %}
 
diff --git a/src/olympia/reviewers/tests/test_views.py b/src/olympia/reviewers/tests/test_views.py
index 1d3a45f074ad..09f67762ac97 100644
--- a/src/olympia/reviewers/tests/test_views.py
+++ b/src/olympia/reviewers/tests/test_views.py
@@ -4195,7 +4195,7 @@ def test_assay_link(self):
             == f'vscode://mozilla.assay/review/{self.addon.guid}/{self.addon.current_version.version}'
         )
 
-    def test_download_sources_link(self):
+    def _setup_source(self):
         version = self.addon.current_version
         tdir = temp.gettempdir()
         source_file = temp.NamedTemporaryFile(suffix='.zip', dir=tdir, mode='r+')
@@ -4204,6 +4204,8 @@ def test_download_sources_link(self):
         version.source.save(os.path.basename(source_file.name), DjangoFile(source_file))
         version.save()
 
+    def test_download_sources_link(self):
+        self._setup_source()
         url = reverse('reviewers.review', args=[self.addon.pk])
 
         # Admin user: able to download sources.
@@ -4227,6 +4229,33 @@ def test_download_sources_link(self):
         assert response.status_code == 200
         assert b'Download files' in response.content
 
+    @override_settings(SOURCE_BUILDER_VIEWER_URL='https://source.builder/')
+    @override_switch('enable-source-builder', active=True)
+    def test_source_builder_link(self):
+        self._setup_source()
+        url = reverse('reviewers.review', args=[self.addon.pk])
+
+        response = self.client.get(url)
+        assert response.status_code == 200
+        doc = pq(response.content)
+        builder_link = doc('#versions-history td.files .source-builder')
+        assert builder_link[0].text == 'Source Builder'
+        assert (
+            builder_link.attr['href']
+            == f'https://source.builder/?addon_id={self.addon.id}&version_id={self.addon.current_version.id}'
+        )
+
+    @override_settings(SOURCE_BUILDER_VIEWER_URL='https://source.builder/')
+    @override_switch('enable-source-builder', active=False)
+    def test_no_source_link_if_waffle_off(self):
+        self._setup_source()
+        url = reverse('reviewers.review', args=[self.addon.pk])
+
+        response = self.client.get(url)
+        assert response.status_code == 200
+        doc = pq(response.content)
+        assert not doc('#versions-history td.files .source-builder')
+
     def test_translations(self):
         self.addon.name = {
             'de': None,