diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5758bd9dbd..c166c8b823 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,7 +37,9 @@ jobs:
 
       - name: Output Variables
         id: vars
-        run: echo "go_path=$(go env GOPATH)" >> $GITHUB_OUTPUT
+        run: |
+          echo "go_path=$(go env GOPATH)" >> $GITHUB_OUTPUT
+          echo "min_k8s_version=1.23.17" >> $GITHUB_OUTPUT
 
       - name: Check if go.mod and go.sum are up to date
         run: go mod tidy && git diff --exit-code -- go.mod go.sum
@@ -160,10 +162,44 @@ jobs:
           path: ${{ github.workspace }}/dist
           key: nginx-gateway-fabric-${{ github.run_id }}-${{ github.run_number }}
 
+  build:
+    name: Build Image
+    needs: [vars, binary]
+    strategy:
+      fail-fast: false
+      matrix:
+        image: [ngf, nginx, plus]
+        platforms: ["linux/arm64, linux/amd64"]
+    uses: ./.github/workflows/build.yml
+    with:
+      image: ${{ matrix.image }}
+      platforms: ${{ matrix.platforms }}
+    permissions:
+      contents: read # for docker/build-push-action to read repo content
+      security-events: write # for github/codeql-action/upload-sarif to upload SARIF results
+      packages: write # for docker/build-push-action to push to GHCR
+      id-token: write # for docker/login to login to NGINX registry
+    secrets: inherit
+
+  functional-tests:
+    name: Functional tests
+    needs: [vars, build]
+    strategy:
+      fail-fast: false
+      matrix:
+        image: [nginx, plus]
+        k8s-version: ["${{ needs.vars.min_k8s_version }}", "latest"]
+    uses: ./.github/workflows/functional.yml
+    with:
+      image: ${{ matrix.image }}
+      k8s-version: ${{ matrix.k8s-version }}
+    permissions:
+      contents: read
+
   helm-tests:
     name: Helm Tests
     runs-on: ubuntu-22.04
-    needs: [vars, binary]
+    needs: [vars, build]
     steps:
       - name: Checkout Repository
         uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
@@ -210,7 +246,6 @@ jobs:
           target: goreleaser
           load: true
           cache-from: type=gha,scope=ngf
-          cache-to: type=gha,scope=ngf,mode=max
           pull: true
 
       - name: Build NGINX Docker Image
@@ -221,7 +256,6 @@ jobs:
           context: "."
           load: true
           cache-from: type=gha,scope=nginx
-          cache-to: type=gha,scope=nginx,mode=max
           pull: true
           build-args: |
             NJS_DIR=internal/mode/static/nginx/modules/src
@@ -254,25 +288,6 @@ jobs:
           -n nginx-gateway
         working-directory: ${{ github.workspace }}/deploy/helm-chart
 
-  build:
-    name: Build Image
-    needs: [vars, binary]
-    strategy:
-      fail-fast: false
-      matrix:
-        image: [ngf, nginx, plus]
-        platforms: ["linux/arm64, linux/amd64"]
-    uses: ./.github/workflows/build.yml
-    with:
-      image: ${{ matrix.image }}
-      platforms: ${{ matrix.platforms }}
-    permissions:
-      contents: read # for docker/build-push-action to read repo content
-      security-events: write # for github/codeql-action/upload-sarif to upload SARIF results
-      packages: write # for docker/build-push-action to push to GHCR
-      id-token: write # for docker/login to login to NGINX registry
-    secrets: inherit
-
   publish-helm:
     name: Package and Publish Helm Chart
     runs-on: ubuntu-22.04
diff --git a/.github/workflows/functional.yml b/.github/workflows/functional.yml
index 214e432172..4dffb432f9 100644
--- a/.github/workflows/functional.yml
+++ b/.github/workflows/functional.yml
@@ -1,22 +1,19 @@
 name: Functional Testing
 
 on:
-  push:
-    branches:
-      - main
-      - release-*
-    tags:
-      - "v[0-9]+.[0-9]+.[0-9]+*"
-  pull_request:
+  workflow_call:
+    inputs:
+      image:
+        required: true
+        type: string
+      k8s-version:
+        required: true
+        type: string
 
 defaults:
   run:
     shell: bash
 
-concurrency:
-  group: ${{ github.ref_name }}-functional
-  cancel-in-progress: true
-
 permissions:
   contents: read
 
@@ -24,25 +21,15 @@ jobs:
   functional-tests:
     name: Gateway Functional Tests
     runs-on: ubuntu-22.04
-    strategy:
-        matrix:
-          k8s-version: ["1.23.17", "latest"]
-          nginx-image: [nginx, nginx-plus]
     steps:
       - name: Checkout Repository
         uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
 
-      - name: Setup Golang Environment
-        uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
+      - name: Fetch Cached Artifacts
+        uses: actions/cache@ab5e6d0c87105b4c9c2047343972218f562e4319 # v4.0.1
         with:
-          go-version: stable
-
-      - name: Set GOPATH
-        run: echo "GOPATH=$(go env GOPATH)" >> $GITHUB_ENV
-
-      - name: Docker Buildx
-        uses: docker/setup-buildx-action@2b51285047da1547ffb1b2203d8be4c0af6b1f20 # v3.2.0
-
+          path: ${{ github.workspace }}/dist
+          key: nginx-gateway-fabric-${{ github.run_id }}-${{ github.run_number }}
 
       - name: NGF Docker meta
         id: ngf-meta
@@ -61,22 +48,13 @@ jobs:
         uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
         with:
           images: |
-            name=ghcr.io/nginxinc/nginx-gateway-fabric/${{ matrix.nginx-image }}
+            name=ghcr.io/nginxinc/nginx-gateway-fabric/${{ inputs.image }}
           tags: |
             type=semver,pattern={{version}}
             type=edge
             type=ref,event=pr
             type=ref,event=branch,suffix=-rc,enable=${{ startsWith(github.ref, 'refs/heads/release') }}
 
-      - name: Build binary
-        uses: goreleaser/goreleaser-action@7ec5c2b0c6cdda6e8bbb49444bc797dd33d74dd8 # v5.0.0
-        with:
-          version: latest
-          args: build --snapshot --clean
-        env:
-          TELEMETRY_ENDPOINT: otel-collector-opentelemetry-collector.collector.svc.cluster.local:4317
-          TELEMETRY_ENDPOINT_INSECURE: "true"
-
       - name: Build NGF Docker Image
         uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5.3.0
         with:
@@ -85,19 +63,17 @@ jobs:
           context: "."
           load: true
           cache-from: type=gha,scope=ngf
-          cache-to: type=gha,scope=ngf,mode=max
           pull: true
           target: goreleaser
 
       - name: Build NGINX Docker Image
         uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5.3.0
         with:
-          file: build/Dockerfile${{ matrix.nginx-image == 'nginx' && '.nginx' || '' }}${{ matrix.nginx-image == 'nginx-plus' && '.nginxplus' || ''}}
+          file: build/Dockerfile${{ inputs.image == 'nginx' && '.nginx' || '' }}${{ inputs.image == 'plus' && '.nginxplus' || ''}}
           tags: ${{ steps.nginx-meta.outputs.tags }}
           context: "."
           load: true
-          cache-from: type=gha,scope=${{ matrix.nginx-image }}
-          cache-to: type=gha,scope=${{ matrix.nginx-image }},mode=max
+          cache-from: type=gha,scope=${{ inputs.image }}
           pull: true
           build-args: |
             NJS_DIR=internal/mode/static/nginx/modules/src
@@ -116,12 +92,12 @@ jobs:
         run: |
           ngf_prefix=ghcr.io/nginxinc/nginx-gateway-fabric
           ngf_tag=${{ steps.ngf-meta.outputs.version }}
-          make load-images${{ matrix.nginx-image == 'nginx-plus' && '-with-plus' || ''}} PREFIX=${ngf_prefix} TAG=${ngf_tag}
+          make load-images${{ inputs.image == 'plus' && '-with-plus' || ''}} PREFIX=${ngf_prefix} TAG=${ngf_tag}
         working-directory: ./tests
 
       - name: Run functional telemetry tests
         run: |
           ngf_prefix=ghcr.io/nginxinc/nginx-gateway-fabric
           ngf_tag=${{ steps.ngf-meta.outputs.version }}
-          make test${{ matrix.nginx-image == 'nginx-plus' && '-with-plus' || ''}} PREFIX=${ngf_prefix} TAG=${ngf_tag} GINKGO_LABEL=telemetry
+          make test${{ inputs.image == 'plus' && '-with-plus' || ''}} PREFIX=${ngf_prefix} TAG=${ngf_tag} GINKGO_LABEL=telemetry
         working-directory: ./tests