diff --git a/.github/file-filters.yml b/.github/file-filters.yml
index f3ec61fc2..2ae1bf9b4 100644
--- a/.github/file-filters.yml
+++ b/.github/file-filters.yml
@@ -30,5 +30,14 @@
 admin: &admin
   - 'admin/**/*'
 
-frontend: &admin
+dht_node: &dht_node
+  - 'dht-node/**/*'
+
+docker: &docker
+  - 'docker-compose.*'
+
+federation: &federation
+  - 'federation/**/*'
+
+frontend: &frontend
   - 'frontend/**/*'
\ No newline at end of file
diff --git a/.github/workflows/test_dht-node.yml b/.github/workflows/test_dht-node.yml
index fbda230ee..a57f09399 100644
--- a/.github/workflows/test_dht-node.yml
+++ b/.github/workflows/test_dht-node.yml
@@ -3,17 +3,38 @@ name: Gradido DHT Node Test CI
 on: push
 
 jobs:
+  # only (but most important) job from this workflow required for pull requests
+  # check results serve as run conditions for all other jobs here 
+  files-changed:
+    name: Detect File Changes - DHT Node
+    runs-on: ubuntu-latest
+    outputs:
+      dht_node: ${{ steps.changes.outputs.dht_node }}
+      docker: ${{ steps.changes.outputs.docker }}
+    steps:
+      - uses: actions/checkout@v3.3.0
+
+      - name: Check for frontend file changes
+        uses: dorny/paths-filter@v2.11.1
+        id: changes
+        with:
+          token: ${{ github.token }}
+          filters: .github/file-filters.yml
+          list-files: shell
+
   ##############################################################################
   # JOB: DOCKER BUILD TEST #####################################################
   ##############################################################################
   build:
     name: Docker Build Test - DHT Node
+    if: needs.files-changed.outputs.dht_node == 'true' || needs.files-changed.outputs.docker == 'true'
+    needs: files-changed
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
       
-      - name: Build `test` image
+      - name: Build 'test' image
         run: |
           docker build --target test -t "gradido/dht-node:test" -f dht-node/Dockerfile .
           docker save "gradido/dht-node:test" > /tmp/dht-node.tar
@@ -29,30 +50,24 @@ jobs:
   ##############################################################################
   lint:
     name: Lint - DHT Node
+    if: needs.files-changed.outputs.dht_node == 'true'
+    needs: files-changed
     runs-on: ubuntu-latest
-    needs: [build]
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
-
-      - name: Download Docker Image
-        uses: actions/download-artifact@v3
-        with:
-          name: docker-dht-node-test
-          path: /tmp
-      - name: Load Docker Image
-        run: docker load < /tmp/dht-node.tar
       
       - name: Lint
-        run: docker run --rm gradido/dht-node:test yarn run lint
+        run: cd dht-node && yarn && yarn run lint
 
   ##############################################################################
   # JOB: UNIT TEST #############################################################
   ##############################################################################
   unit_test:
     name: Unit Tests - DHT Node
+    if: needs.files-changed.outputs.dht_node == 'true' || needs.files-changed.outputs.docker == 'true'
+    needs: [files-changed, build]
     runs-on: ubuntu-latest
-    needs: [build]
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
diff --git a/.github/workflows/test_federation.yml b/.github/workflows/test_federation.yml
index 7d92f1f84..fc29a1bf8 100644
--- a/.github/workflows/test_federation.yml
+++ b/.github/workflows/test_federation.yml
@@ -3,11 +3,32 @@ name: Gradido Federation Test CI
 on: push
 
 jobs:
+  # only (but most important) job from this workflow required for pull requests
+  # check results serve as run conditions for all other jobs here 
+  files-changed:
+    name: Detect File Changes - Federation
+    runs-on: ubuntu-latest
+    outputs:
+      docker: ${{ steps.changes.outputs.docker }}
+      federation: ${{ steps.changes.outputs.federation }}
+    steps:
+      - uses: actions/checkout@v3.3.0
+
+      - name: Check for frontend file changes
+        uses: dorny/paths-filter@v2.11.1
+        id: changes
+        with:
+          token: ${{ github.token }}
+          filters: .github/file-filters.yml
+          list-files: shell
+  
   ##############################################################################
   # JOB: DOCKER BUILD TEST #####################################################
   ##############################################################################
   build:
     name: Docker Build Test - Federation
+    if: needs.files-changed.outputs.docker == 'true' || needs.files-changed.outputs.federation == 'true'
+    needs: files-changed
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -29,30 +50,24 @@ jobs:
   ##############################################################################
   lint:
     name: Lint - Federation
+    if: needs.files-changed.outputs.federation == 'true'
+    needs: files-changed
     runs-on: ubuntu-latest
-    needs: [build]
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
-
-      - name: Download Docker Image
-        uses: actions/download-artifact@v3
-        with:
-          name: docker-federation-test
-          path: /tmp
-      - name: Load Docker Image
-        run: docker load < /tmp/federation.tar
       
       - name: Lint
-        run: docker run --rm gradido/federation:test yarn run lint
+        run: cd federation && yarn && yarn run lint
 
   ##############################################################################
   # JOB: UNIT TEST #############################################################
   ##############################################################################
   unit_test:
     name: Unit Tests - Federation
+    if: needs.files-changed.outputs.docker == 'true' || needs.files-changed.outputs.federation == 'true'
+    needs: [files-changed, build]
     runs-on: ubuntu-latest
-    needs: [build]
     steps:
       - name: Checkout code
         uses: actions/checkout@v3