diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..543516f
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,87 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  web-ci:
+    name: Web CI
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Lint
+        run: pnpm --filter @headquarter/web lint
+
+      - name: Typecheck
+        run: pnpm --filter @headquarter/web typecheck
+
+      - name: Test
+        run: pnpm --filter @headquarter/web test
+
+  api-ci:
+    name: API CI
+    runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres:16
+        env:
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DB: headquarter_test
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install API dev dependencies
+        working-directory: apps/api
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e ".[dev]"
+
+      - name: Ruff check
+        working-directory: apps/api
+        run: ruff check app/ tests/
+
+      - name: Mypy
+        working-directory: apps/api
+        run: mypy app/ tests/
+
+      - name: Pytest
+        working-directory: apps/api
+        env:
+          DATABASE_URL: postgresql://postgres:postgres@localhost:5432/headquarter_test
+        run: pytest
diff --git a/apps/api/pyproject.toml b/apps/api/pyproject.toml
index 1dc9631..29885ec 100644
--- a/apps/api/pyproject.toml
+++ b/apps/api/pyproject.toml
@@ -18,6 +18,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "pytest>=8.3.0",
+    "pytest-asyncio>=0.24.0",
     "httpx>=0.28.0",
     "ruff>=0.11.0",
     "mypy>=1.15.0",