diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..573ce99f
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,206 @@
+name: Rust CI/CD
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+env:
+  IMAGE: paritytech/ci-unified:bullseye-1.73.0
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+jobs:
+  set-image:
+    # GitHub Actions does not allow using 'env' in a container context.
+    # This workaround sets the container image for each job using 'set-image' job output.
+    runs-on: ubuntu-latest
+    outputs:
+      IMAGE: ${{ steps.set_image.outputs.IMAGE }}
+    steps:
+      - id: set_image
+        run: echo "IMAGE=${{ env.IMAGE }}" >> $GITHUB_OUTPUT
+
+# Checks
+  clippy:
+    runs-on: ubuntu-latest
+    needs: [set-image]
+    container: ${{ needs.set-image.outputs.IMAGE }}
+    steps:
+      - name: Checkout code/.
+        uses: actions/checkout@v4
+
+      - name: Show Rust version
+        run: |
+          cargo -vV
+          rustc -vV
+          rustup show
+
+      - name: Cache Rust dependencies
+        uses: swatinem/rust-cache@v2
+        with:
+          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Run Clippy
+        run: |
+          cargo +stable clippy --locked -- -Dwarnings
+          cargo +stable clippy --locked -p parity-scale-codec-derive -- -Dwarnings
+          cargo +stable clippy --locked --test clippy -- -Dwarnings
+
+  checks:
+    runs-on: ubuntu-latest
+    needs: [set-image]
+    container: ${{ needs.set-image.outputs.IMAGE }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Show Rust version
+        run: |
+          cargo -vV
+          rustc -vV
+          rustup show
+
+      - name: Cache Rust dependencies
+        uses: swatinem/rust-cache@v2
+        with:
+          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Check Rust Stable (no_derive_no_std)
+        run: time cargo +stable check --verbose --no-default-features --features bit-vec,bytes,generic-array
+
+      - name: Check Rust Stable (no_std-chain-error)
+        run: |
+          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
+          time cargo +stable check --verbose --no-default-features --features chain-error
+
+      - name: check-rust-stable-no_derive
+        run: |
+          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
+          time cargo +stable check --verbose --features bit-vec,bytes,generic-array
+
+      - name: check-rust-stable-only_mel
+        run: |
+          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
+          time cargo +stable check --verbose --features max-encoded-len
+
+# Tests
+  tests:
+    runs-on: ubuntu-latest
+    needs: [set-image]
+    container: ${{ needs.set-image.outputs.IMAGE }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Show Rust version
+        run: |
+          cargo -vV
+          rustc -vV
+          rustup show
+
+      - name: Cache Rust dependencies
+        uses: swatinem/rust-cache@v2
+        with:
+          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Test Rust Stable
+        run: |
+          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
+          time cargo +stable test --verbose --all --features bit-vec,bytes,generic-array,derive,max-encoded-len
+
+      - name: Test Rust Stable (no_derive)
+        run: |
+          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
+          time cargo +stable test --verbose --features bit-vec,bytes,generic-array
+
+      - name: Test Rust Stable (only_mel)
+        run: |
+          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
+          time cargo +stable test --verbose --features max-encoded-len
+
+      - name: Test Rust Stable (only_mel-no_default_std)
+        run: |
+          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
+          time cargo +stable test --verbose --features max-encoded-len,std --no-default-features
+
+# Benches
+  bench-rust-nightly:
+    runs-on: ubuntu-latest
+    needs: [set-image]
+    strategy:
+      matrix:
+        feature: [bit-vec,bytes,generic-array,derive,max-encoded-len]
+    container: ${{ needs.set-image.outputs.IMAGE }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Cache Rust dependencies
+        uses: swatinem/rust-cache@v2
+        with:
+          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Bench Rust Nightly
+        run: |
+          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
+          time cargo +nightly bench --features ${{ matrix.feature }}
+
+  miri:
+    runs-on: ubuntu-latest
+    needs: [set-image]
+    strategy:
+      matrix:
+        feature: [bit-vec,bytes,generic-array,arbitrary]
+    container: ${{ needs.set-image.outputs.IMAGE }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Cache Rust dependencies
+        uses: swatinem/rust-cache@v2
+        with:
+          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Run Miri
+        run: |
+          export RUST_BACKTRACE=1
+          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
+          export MIRIFLAGS='-Zmiri-disable-isolation'
+          time cargo +nightly miri test --features ${{ matrix.feature }} --release
+
+# Build
+
+  build-linux-ubuntu-amd64:
+    runs-on: ubuntu-latest
+    needs: [set-image, clippy, checks, tests]
+    container: ${{ needs.set-image.outputs.IMAGE }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Cache Rust dependencies
+        uses: swatinem/rust-cache@v2
+        with:
+          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Build for Linux (Ubuntu, AMD64)
+        run: cargo build --verbose --release --features bit-vec,bytes,generic-array,derive
+
+  publish-dry-run:
+    runs-on: ubuntu-latest
+    needs: [set-image, build-linux-ubuntu-amd64]
+    container: ${{ needs.set-image.outputs.IMAGE }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Cache Rust dependencies
+        uses: swatinem/rust-cache@v2
+        with:
+          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Dry Run Publish
+        if: github.event_name == 'pull_request'
+        run: cargo publish -p parity-scale-codec --dry-run
diff --git a/.github/workflows/gitspiegel-trigger.yml b/.github/workflows/gitspiegel-trigger.yml
deleted file mode 100644
index dce3aaf2..00000000
--- a/.github/workflows/gitspiegel-trigger.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-name: gitspiegel sync
-
-# This workflow doesn't do anything, it's only use is to trigger "workflow_run"
-# webhook, that'll be consumed by gitspiegel
-# This way, gitspiegel won't do mirroring, unless this workflow runs,
-# and running the workflow is protected by GitHub
-
-on:
-  pull_request:
-    types:
-      - opened
-      - synchronize
-      - unlocked
-      - ready_for_review
-      - reopened
-
-jobs:
-  sync:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Do nothing
-        run: echo "let's go"
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
new file mode 100644
index 00000000..2e9f3322
--- /dev/null
+++ b/.github/workflows/publish.yml
@@ -0,0 +1,23 @@
+name: Publish release to crates.io
+
+on:
+  release:
+    types:
+      - published
+
+jobs:
+  publish-crate:
+    runs-on: ubuntu-latest
+    environment: release
+    container: paritytech/ci-unified:bullseye-1.73.0
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Cache Rust dependencies
+        uses: swatinem/rust-cache@v2
+        with:
+          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Publish Crate
+        run: cargo publish --token ${{ secrets.CARGO_REGISTRY_TOKEN }} -p parity-scale-codec
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
deleted file mode 100644
index cc6b587f..00000000
--- a/.gitlab-ci.yml
+++ /dev/null
@@ -1,201 +0,0 @@
-# .gitlab-ci.yml
-#
-
-include:
-  - project: parity/infrastructure/ci_cd/shared
-    ref: main
-    file: /common/ci-unified.yml
-
-stages:
-  - check
-  - test
-  - build
-  - publish
-
-variables:
-  GIT_STRATEGY: fetch
-  GIT_DEPTH: "100"
-  CARGO_INCREMENTAL: 0
-  CI_IMAGE: !reference [.ci-unified, variables, CI_IMAGE]
-
-default:
-  cache: {}
-  interruptible: true
-  retry:
-    max: 2
-    when:
-      - runner_system_failure
-      - unknown_failure
-      - api_failure
-
-.kubernetes-env:
-  image: $CI_IMAGE
-  tags:
-    - kubernetes-parity-build
-
-.docker-env:
-  image: $CI_IMAGE
-  before_script:
-    - cargo -vV
-    - rustc -vV
-    - rustup show
-    - bash --version
-  rules:
-    - if: $CI_PIPELINE_SOURCE == "trigger"
-    - if: $CI_PIPELINE_SOURCE == "web"
-    - if: $CI_PIPELINE_SOURCE == "schedule"
-    - if: $CI_COMMIT_REF_NAME == "master"
-    - if: $CI_COMMIT_REF_NAME == "tags"
-    - if: $CI_COMMIT_REF_NAME =~ /^[0-9]+$/ # PRs
-    - if: $CI_COMMIT_REF_NAME =~ /^v[0-9]+\.[0-9]+.*$/ # i.e. v1.0, v2.1rc1
-  tags:
-    - linux-docker
-
-#### stage:                        check
-
-check-clippy:
-  stage: check
-  extends: .docker-env
-  script:
-    - rustup component add clippy --toolchain stable-x86_64-unknown-linux-gnu
-    - time cargo +stable clippy --locked -- -Dwarnings
-    - time cargo +stable clippy --locked -p parity-scale-codec-derive -- -Dwarnings
-    - time cargo +stable clippy --locked --test clippy -- -Dwarnings
-
-check-rust-stable-no_derive_no_std:
-  stage: check
-  extends: .docker-env
-  variables:
-    RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-  script:
-    - time cargo +stable check --verbose --no-default-features --features bit-vec,bytes,generic-array
-
-check-rust-stable-no_std-chain-error:
-  stage: check
-  extends: .docker-env
-  variables:
-    RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-  script:
-    - time cargo +stable check --verbose --no-default-features --features chain-error
-
-check-rust-stable-no_derive:
-  stage: check
-  extends: .docker-env
-  variables:
-    RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-  script:
-    - time cargo +stable check --verbose --features bit-vec,bytes,generic-array
-
-check-rust-stable-only_mel:
-  stage: check
-  extends: .docker-env
-  variables:
-    RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-  script:
-    - time cargo +stable check --verbose --features max-encoded-len
-
-#### stage:                        test
-
-test-rust-stable:
-  stage: test
-  extends: .docker-env
-  variables:
-    RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-  script:
-    - time cargo +stable test --verbose --all --features bit-vec,bytes,generic-array,derive,max-encoded-len
-
-test-rust-stable-no_derive:
-  stage: test
-  extends: .docker-env
-  variables:
-    RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-  script:
-    - time cargo +stable test --verbose --features bit-vec,bytes,generic-array
-
-test-rust-stable-only_mel:
-  stage: test
-  extends: .docker-env
-  variables:
-    RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-  script:
-    - time cargo +stable test --verbose --features max-encoded-len
-
-test-rust-stable-only_mel-no_default_std:
-  stage: test
-  extends: .docker-env
-  variables:
-    RUSTFLAGS: "-Cdebug-assertions=y -Dwarnings"
-  script:
-    - time cargo +stable test --verbose --features max-encoded-len,std --no-default-features
-
-bench-rust-nightly:
-  stage: test
-  extends: .docker-env
-  script:
-    - time cargo +nightly bench --features bit-vec,bytes,generic-array,derive
-
-miri:
-  stage: test
-  extends: .docker-env
-  variables:
-    RUST_BACKTRACE: 1
-    MIRIFLAGS: "-Zmiri-disable-isolation"
-  script:
-    - time cargo +nightly miri test --features bit-vec,bytes,generic-array,arbitrary --release
-
-# check that build is no_std compatible
-# more info: https://github.com/paritytech/parity-scale-codec/pull/389
-build-no-std:
-  stage: test
-  extends: .docker-env
-  variables:
-    RUST_BACKTRACE: 1
-  script:
-    # this target doesn't support std envs; it should flag any unexpected uses of std
-    - rustup target add thumbv6m-none-eabi
-    - time cargo build --target thumbv6m-none-eabi --no-default-features
-
-build-no-atomic-ptrs:
-  stage: test
-  extends: .docker-env
-  variables:
-    RUST_BACKTRACE: 1
-  script:
-    # this target doesn't have atomic ptrs. Some parts of alloc are not available there
-    # we want to make sure that this crate still works on those targets
-    - cargo +nightly check --target bpfel-unknown-none -Zbuild-std="core,alloc" --no-default-features --features generic-array,derive,max-encoded-len,chain-error
-
-#### stage:                        build
-
-build-linux-ubuntu-amd64:
-  stage: build
-  extends: .docker-env
-  rules:
-    - if: $CI_PIPELINE_SOURCE == "web"
-    - if: $CI_PIPELINE_SOURCE == "schedule"
-    - if: $CI_COMMIT_REF_NAME == "master"
-    - if: $CI_COMMIT_REF_NAME == "tags"
-  script:
-    - cargo build --verbose --release --features bit-vec,bytes,generic-array,derive
-
-#### stage:                        publish
-
-publish-dry-run:
-  stage: publish
-  extends: .kubernetes-env
-  # artificial dependency in order not to wait miri job
-  needs:
-    - job: check-clippy
-      artifacts: false
-  rules:
-    - if: $CI_COMMIT_REF_NAME =~ /^[0-9]+$/ # PRs
-  script:
-    - cargo publish -p parity-scale-codec --dry-run
-
-publish-crate:
-  stage: publish
-  extends: .kubernetes-env
-  rules:
-    - if: $CI_COMMIT_REF_NAME =~ /^v[0-9]+\.[0-9]+.*$/ # i.e. v1.0, v2.1rc1
-  script:
-    - cargo publish -p parity-scale-codec