diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index af023413..2fe900f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,16 +20,17 @@ on:
 jobs:
   build:
     name: Build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
+    - uses: extractions/setup-just@v2
     - uses: actions/checkout@v3
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
         ruby-version:  3.1
     - name: Lint
-      run: bundle install && bundle exec rake rubocop
+      run: just lint
     - name: Build
       run: gem build stripe.gemspec
     - name: 'Upload Artifact'
@@ -40,12 +41,13 @@ jobs:
 
   test:
     name: Test (${{ matrix.ruby-version }})
-    # this is needed because our JRuby test version isnt supported on ubuntu-24 (which is now ubuntu-latest)
+    # this version of jruby isn't available in the new latest (24.04) so we have to pin (or update jruby)
     runs-on: ubuntu-22.04
     strategy:
       matrix:
         ruby-version: [2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1, 3.2, '3.3', jruby-9.4.0.0, truffleruby-head]
     steps:
+    - uses: extractions/setup-just@v2
     - uses: actions/checkout@v3
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
@@ -53,7 +55,7 @@ jobs:
         ruby-version: ${{ matrix.ruby-version }}
     - uses: stripe/openapi/actions/stripe-mock@master
     - name: test
-      run: make ci-test
+      run: just test typecheck
       env:
         GITHUB_TOKEN: ${{ secrets.github_token }}
 
@@ -64,7 +66,7 @@ jobs:
       startsWith(github.ref, 'refs/tags/v') &&
       endsWith(github.actor, '-stripe')
     needs: [build, test]
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
     - name: Download all workflow run artifacts
       uses: actions/download-artifact@v4
diff --git a/Makefile b/Makefile
index cc7d150f..218187cf 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+# NOTE: this file is deprecated and slated for deletion; prefer using the equivalent `just` commands.
+
 .PHONY: update-version codegen-format test ci-test
 update-version:
 	@echo "$(VERSION)" > VERSION
diff --git a/README.md b/README.md
index 121329af..a271ef82 100644
--- a/README.md
+++ b/README.md
@@ -364,19 +364,20 @@ New features and bug fixes are released on the latest major version of the Strip
 
 [Contribution guidelines for this project](CONTRIBUTING.md)
 
-The test suite depends on [stripe-mock], so make sure to fetch and run it from a
-background terminal ([stripe-mock's README][stripe-mock] also contains
-instructions for installing via Homebrew and other methods):
+The test suite depends on [stripe-mock], so make sure to fetch and run it from a background terminal ([stripe-mock's README][stripe-mock] also contains instructions for installing via Homebrew and other methods):
 
 ```sh
 go install github.com/stripe/stripe-mock@latest
 stripe-mock
 ```
 
+We use [just](https://github.com/casey/just) for common development tasks. You can install it or run the underlying commands directly (by copying them from the `justfile`). Common tasks include:
+
 Run all tests:
 
 ```sh
-bundle exec rake test
+just test
+# or: bundle exec rake test
 ```
 
 Run a single test suite:
@@ -394,13 +395,15 @@ bundle exec ruby -Ilib/ test/stripe/util_test.rb -n /should.convert.names.to.sym
 Run the linter:
 
 ```sh
-bundle exec rake rubocop
+just lint
+# or: bundle exec rubocop
 ```
 
 Update bundled CA certificates from the [Mozilla cURL release][curl]:
 
 ```sh
-bundle exec rake update_certs
+just update-certs
+# or: bundle exec rake update_certs
 ```
 
 Update the bundled [stripe-mock] by editing the version number found in
diff --git a/Rakefile b/Rakefile
index 44ae7a6c..b8646ef2 100644
--- a/Rakefile
+++ b/Rakefile
@@ -8,11 +8,6 @@ Rake::TestTask.new do |t|
   t.pattern = "./test/**/*_test.rb"
 end
 
-if RUBY_VERSION >= "2.7.0"
-  require "rubocop/rake_task"
-  RuboCop::RakeTask.new
-end
-
 desc "Update bundled certs"
 task :update_certs do
   require "net/http"
diff --git a/justfile b/justfile
new file mode 100644
index 00000000..0abb4479
--- /dev/null
+++ b/justfile
@@ -0,0 +1,41 @@
+set quiet
+
+import? '../sdk-codegen/utils.just'
+
+_default:
+    just --list --unsorted
+
+install *args:
+    bundle install {{ if is_dependency() == "true" {"--quiet"} else {""} }} {{ args }}
+
+# ⭐ run all unit tests
+test: install
+    bundle exec rake test
+
+# check linting / formatting status of files
+format-check *args: install
+    bundle exec rubocop {{ args }}
+alias lint-check := format-check
+
+# ⭐ check style & formatting for all files, fixing what we can
+lint: (format-check "--autocorrect")
+
+# copy of `lint` with less output
+format: (format-check "--format quiet --autocorrect")
+
+update-certs: install
+    bundle exec rake update_certs
+
+# run sorbet to check type definitions
+typecheck: install
+    {{ if semver_matches(`ruby -e "puts RUBY_VERSION"`, ">=2.7") == "true" { \
+        "bundle exec srb tc" \
+    } else { \
+        "echo \"Ruby version < 2.7, skipping srb tc\"" \
+    } }}
+
+# called by tooling
+[private]
+update-version version:
+    echo "{{ version }}" > VERSION
+    perl -pi -e 's|VERSION = "[.\-\w\d]+"|VERSION = "{{ version }}"|' lib/stripe/version.rb