diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 57802e598546..1802809bd2b0 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -118,12 +118,26 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - name: Bootstrap
-        uses: ./.github/actions/bootstrap
+      - name: Set up Python
+        uses: actions/setup-python@v5
         with:
           python-version: 3.8
+      - name: Install build tools
+        run: |
+            python -m pip install -U pip==23.3.1
+        shell: bash
+      # Using approach described here for Python location caching:
+      # https://blog.allenai.org/python-caching-in-github-actions-e9452698e98d
+      - name: Cache Python location
+        id: cache-python
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.pythonLocation }}
+          key: pythonloc-${{ runner.os }}-${{ matrix.directory }}-${{ env.pythonLocation }}-${{ hashFiles('**/pyproject.toml') }}
+          restore-keys: |
+            pythonloc-${{ runner.os }}-${{ matrix.directory }}-${{ env.pythonLocation }}
       - name: Install dependencies
-        run: python -m poetry install
+        run: python -m pip install --upgrade .
       - name: Install Flower wheel from artifact store
         if: ${{ github.repository == 'adap/flower' && !github.event.pull_request.head.repo.fork && github.actor != 'dependabot[bot]' }}
         run: |
diff --git a/e2e/bare-client-auth/pyproject.toml b/e2e/bare-client-auth/pyproject.toml
index 693fec815474..839f0779cc01 100644
--- a/e2e/bare-client-auth/pyproject.toml
+++ b/e2e/bare-client-auth/pyproject.toml
@@ -1,13 +1,20 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
+[project]
 name = "bare_client_auth_test"
 version = "0.1.0"
 description = "Client-auth-enabled bare Federated Learning test with Flower"
-authors = ["The Flower Authors <hello@flower.ai>"]
+authors = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr @ {root:parent:parent:uri}",
+]
 
-[tool.poetry.dependencies]
-python = "^3.8"
-flwr = { path = "../../", develop = true }
+[tool.hatch.build.targets.wheel]
+packages = ["."]
+
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/bare-https/pyproject.toml b/e2e/bare-https/pyproject.toml
index 3afb7b57a084..de8aa92cbd02 100644
--- a/e2e/bare-https/pyproject.toml
+++ b/e2e/bare-https/pyproject.toml
@@ -1,13 +1,20 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
+[project]
 name = "bare_https_test"
 version = "0.1.0"
 description = "HTTPS-enabled bare Federated Learning test with Flower"
-authors = ["The Flower Authors <hello@flower.ai>"]
+authors = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr @ {root:parent:parent:uri}",
+]
 
-[tool.poetry.dependencies]
-python = "^3.8"
-flwr = { path = "../../", develop = true }
+[tool.hatch.build.targets.wheel]
+packages = ["."]
+
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/bare/pyproject.toml b/e2e/bare/pyproject.toml
index 45ce7ea333af..ba8c1b2b2276 100644
--- a/e2e/bare/pyproject.toml
+++ b/e2e/bare/pyproject.toml
@@ -1,13 +1,20 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
+[project]
 name = "bare_test"
 version = "0.1.0"
 description = "Bare Federated Learning test with Flower"
-authors = ["The Flower Authors <hello@flower.ai>"]
+authors = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr[simulation,rest] @ {root:parent:parent:uri}",
+]
 
-[tool.poetry.dependencies]
-python = "^3.8"
-flwr = { path = "../../", develop = true, extras = ["simulation", "rest"] }
+[tool.hatch.build.targets.wheel]
+packages = ["."]
+
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/fastai/pyproject.toml b/e2e/fastai/pyproject.toml
index feed31f6d202..53d3b7e7baf1 100644
--- a/e2e/fastai/pyproject.toml
+++ b/e2e/fastai/pyproject.toml
@@ -1,15 +1,22 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
+[project]
 name = "quickstart-fastai"
 version = "0.1.0"
 description = "Fastai Federated Learning E2E test with Flower"
-authors = ["The Flower Authors <hello@flower.ai>"]
+authors = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr[simulation] @ {root:parent:parent:uri}",
+    "fastai>=2.7.12,<3.0.0",
+    "torch>=2.0.0,!=2.0.1,<2.1.0",
+]
 
-[tool.poetry.dependencies]
-python = ">=3.8,<3.10"
-flwr = { path = "../../", develop = true, extras = ["simulation"] }
-fastai = "^2.7.12"
-torch = ">=2.0.0, !=2.0.1, < 2.1.0"
+[tool.hatch.build.targets.wheel]
+packages = ["."]
+
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/jax/pyproject.toml b/e2e/jax/pyproject.toml
index 9a4af5dee59a..bb024ba14d23 100644
--- a/e2e/jax/pyproject.toml
+++ b/e2e/jax/pyproject.toml
@@ -1,17 +1,24 @@
-[tool.poetry]
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
 name = "jax_example"
 version = "0.1.0"
 description = "JAX example training a linear regression model with federated learning"
-authors = ["The Flower Authors <hello@flower.ai>"]
+authors = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr[simulation] @ {root:parent:parent:uri}",
+    "jax==0.4.13",
+    "jaxlib==0.4.13",
+    "scikit-learn>=1.1.1,<2.0.0",
+    "numpy>=1.21.4,<2.0.0",
+]
 
-[tool.poetry.dependencies]
-python = "^3.8"
-flwr = { path = "../../", develop = true, extras = ["simulation"] }
-jax = "==0.4.13"
-jaxlib = "==0.4.13"
-scikit-learn = "^1.1.1"
-numpy = "^1.21.4"
+[tool.hatch.build.targets.wheel]
+packages = ["."]
 
-[build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/opacus/pyproject.toml b/e2e/opacus/pyproject.toml
index ab4a727cc00b..8fd1056f43a3 100644
--- a/e2e/opacus/pyproject.toml
+++ b/e2e/opacus/pyproject.toml
@@ -1,16 +1,23 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
+[project]
 name = "opacus_e2e"
 version = "0.1.0"
 description = "Opacus E2E testing"
-authors = ["The Flower Authors <hello@flower.ai>"]
+authors = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr[simulation] @ {root:parent:parent:uri}",
+    "opacus>=1.4.0,<2.0.0",
+    "torch>=1.13.1,<2.0.0",
+    "torchvision>=0.14.0,<2.0.0",
+]
 
-[tool.poetry.dependencies]
-python = "^3.8"
-flwr = { path = "../../", develop = true, extras = ["simulation"] }
-opacus = "^1.4.0"
-torch = "^1.13.1"
-torchvision = "^0.14.0"
+[tool.hatch.build.targets.wheel]
+packages = ["."]
+
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/pandas/pyproject.toml b/e2e/pandas/pyproject.toml
index 416dfeec3460..f8f8488a7006 100644
--- a/e2e/pandas/pyproject.toml
+++ b/e2e/pandas/pyproject.toml
@@ -1,17 +1,26 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
+[project]
 name = "quickstart-pandas"
 version = "0.1.0"
-description = "Pandas Federated Analytics Quickstart with Flower"
-authors = ["Ragy Haddad <ragy202@gmail.com>"]
-maintainers = ["The Flower Authors <hello@flower.ai>"]
+description = "Pandas E2E test with Flower"
+authors = [
+    { name = "Ragy Haddad", email = "ragy202@gmail.com" },
+]
+maintainers = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr[simulation] @ {root:parent:parent:uri}",
+    "numpy>=1.21.0,<2.0.0",
+    "pandas>=2.0.0,<3.0.0",
+    "scikit-learn>=1.1.1,<2.0.0",
+]
 
-[tool.poetry.dependencies]
-python = "^3.8"
-flwr = { path = "../../", develop = true, extras = ["simulation"] }
-numpy = "^1.21.0"
-pandas = "^2.0.0"
-scikit-learn = "^1.1.1"
+[tool.hatch.build.targets.wheel]
+packages = ["."]
+
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/pytorch-lightning/pyproject.toml b/e2e/pytorch-lightning/pyproject.toml
index 90d659813c28..8706ef098d8b 100644
--- a/e2e/pytorch-lightning/pyproject.toml
+++ b/e2e/pytorch-lightning/pyproject.toml
@@ -1,15 +1,22 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
-name = "quickstart-pytorch-lightning"
+[project]
+name = "quickstart-pytorch-lightning-test"
 version = "0.1.0"
 description = "Federated Learning E2E test with Flower and PyTorch Lightning"
-authors = ["The Flower Authors <hello@flower.ai>"]
+authors = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr[simulation] @ {root:parent:parent:uri}",
+    "pytorch-lightning==2.2.4",
+    "torchvision==0.14.1",
+]
 
-[tool.poetry.dependencies]
-python = "^3.8"
-flwr = { path = "../../", develop = true, extras = ["simulation"] }
-pytorch-lightning = "2.2.4"
-torchvision = "0.14.1"
+[tool.hatch.build.targets.wheel]
+packages = ["."]
+
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/pytorch/pyproject.toml b/e2e/pytorch/pyproject.toml
index e538f1437df6..8c59c43d50df 100644
--- a/e2e/pytorch/pyproject.toml
+++ b/e2e/pytorch/pyproject.toml
@@ -1,16 +1,23 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
-name = "quickstart-pytorch"
+[project]
+name = "pytorch_e2e"
 version = "0.1.0"
-description = "PyTorch Federated Learning Quickstart with Flower"
-authors = ["The Flower Authors <hello@flower.ai>"]
+description = "PyTorch Federated Learning E2E test with Flower"
+authors = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr[simulation] @ {root:parent:parent:uri}",
+    "torch>=1.12.0,<2.0.0",
+    "torchvision>=0.14.1,<0.15.0",
+    "tqdm>=4.63.0,<5.0.0",
+]
 
-[tool.poetry.dependencies]
-python = "^3.8"
-flwr = { path = "../../", develop = true, extras = ["simulation"] }
-torch = "^1.12.0"
-torchvision = "^0.14.1"
-tqdm = "^4.63.0"
+[tool.hatch.build.targets.wheel]
+packages = ["."]
+
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/scikit-learn/pyproject.toml b/e2e/scikit-learn/pyproject.toml
index 50c07d31add7..caba2324d44f 100644
--- a/e2e/scikit-learn/pyproject.toml
+++ b/e2e/scikit-learn/pyproject.toml
@@ -1,18 +1,23 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
-name = "sklearn-mnist"
+[project]
+name = "sklearn-mnist-test"
 version = "0.1.0"
-description = "Federated learning with scikit-learn and Flower"
+description = "Federated learning E2E test with scikit-learn and Flower"
 authors = [
-    "The Flower Authors <hello@flower.ai>",
-    "Kaushik Amar Das <kaushik.das@iiitg.ac.in>",
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+    { name = "Kaushik Amar Das", email = "kaushik.das@iiitg.ac.in"},
 ]
+dependencies = [
+    "flwr[simulation,rest] @ {root:parent:parent:uri}",
+    "scikit-learn>=1.1.1,<2.0.0",
+    "openml>=0.14.0,<0.15.0"
+]
+
+[tool.hatch.build.targets.wheel]
+packages = ["."]
 
-[tool.poetry.dependencies]
-python = "^3.8"
-flwr = { path = "../../", develop = true, extras = ["simulation"] }
-scikit-learn = "^1.1.1"
-openml = "^0.14.0"
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/tabnet/pyproject.toml b/e2e/tabnet/pyproject.toml
index b1abf382a24a..99379ddb607e 100644
--- a/e2e/tabnet/pyproject.toml
+++ b/e2e/tabnet/pyproject.toml
@@ -1,18 +1,25 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
-name = "quickstart-tabnet"
+[project]
+name = "quickstart-tabnet-test"
 version = "0.1.0"
-description = "Tabnet Federated Learning Quickstart with Flower"
-authors = ["The Flower Authors <hello@flower.ai>"]
+description = "Tabnet Federated Learning E2E test with Flower"
+authors = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr[simulation] @ {root:parent:parent:uri}",
+    "tensorflow-cpu>=2.9.1,!=2.11.1; platform_machine == \"x86_64\"",
+    "tensorflow-macos>=2.9.1,!=2.11.1; sys_platform == \"darwin\" and platform_machine == \"arm64\"",
+    "tensorflow_datasets==4.9.2",
+    "tensorflow-io-gcs-filesystem<0.35.0",
+    "tabnet==0.1.6",
+]
 
-[tool.poetry.dependencies]
-python = ">=3.8,<3.11"
-flwr = { path = "../../", develop = true, extras = ["simulation"] }
-tensorflow-cpu = { version = ">=2.9.1,<2.11.1 || >2.11.1", markers = "platform_machine == \"x86_64\"" }
-tensorflow-macos = { version = ">=2.9.1,<2.11.1 || >2.11.1", markers = "sys_platform == \"darwin\" and platform_machine == \"arm64\"" }
-tensorflow_datasets = "4.9.2"
-tensorflow-io-gcs-filesystem = "<0.35.0"
-tabnet = "0.1.6"
+[tool.hatch.build.targets.wheel]
+packages = ["."]
+
+[tool.hatch.metadata]
+allow-direct-references = true
diff --git a/e2e/tensorflow/pyproject.toml b/e2e/tensorflow/pyproject.toml
index a7dbfe2305db..4b035873223c 100644
--- a/e2e/tensorflow/pyproject.toml
+++ b/e2e/tensorflow/pyproject.toml
@@ -1,15 +1,22 @@
 [build-system]
-requires = ["poetry-core>=1.4.0"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
-[tool.poetry]
-name = "quickstart-tensorflow"
+[project]
+name = "quickstart-tensorflow-test"
 version = "0.1.0"
-description = "Keras Federated Learning Quickstart with Flower"
-authors = ["The Flower Authors <hello@flower.ai>"]
+description = "Keras Federated Learning E2E test with Flower"
+authors = [
+    { name = "The Flower Authors", email = "hello@flower.ai" },
+]
+dependencies = [
+    "flwr[simulation] @ {root:parent:parent:uri}",
+    "tensorflow-cpu>=2.9.1,!=2.11.1",
+    "tensorflow-io-gcs-filesystem<0.35.0",
+]
 
-[tool.poetry.dependencies]
-python = ">=3.8,<3.11"
-flwr = { path = "../../", develop = true, extras = ["simulation"] }
-tensorflow-cpu = "^2.9.1, !=2.11.1"
-tensorflow-io-gcs-filesystem = "<0.35.0"
+[tool.hatch.build.targets.wheel]
+packages = ["."]
+
+[tool.hatch.metadata]
+allow-direct-references = true