diff --git a/packages/typeless-sample-bot/__snapshots__/index.js b/packages/typeless-sample-bot/__snapshots__/index.js
index f9ad75930d9..ce202525118 100644
--- a/packages/typeless-sample-bot/__snapshots__/index.js
+++ b/packages/typeless-sample-bot/__snapshots__/index.js
@@ -120,7 +120,7 @@ exports['command line option "targets" works with multiple sample files 1'] = [
 ]
 
 exports['command line option "recursive" causes recursion and only matches samples 1'] = [
-  "// Copyright 2019-2021 Google LLC\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n//      http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\n// This is a generated sample, using the typeless sample bot. Please\n// look for the source TypeScript sample (.ts) for modifications.\n'use strict';\n\n/**\n * This application demonstrates how to perform basic operations on\n * subscriptions with the Google Cloud Pub/Sub API.\n *\n * For more information, see the README.md under /pubsub and the documentation\n * at https://cloud.google.com/pubsub/docs.\n */\n\n// sample-metadata:\n//   title: Listen For Avro Records\n//   description: Listens for records in Avro encoding from a subscription.\n//   usage: node listenForAvroRecords.js <subscription-name-or-id> [timeout-in-seconds]\n\n// [START pubsub_subscribe_avro_records]\n/**\n * TODO(developer): Uncomment these variables before running the sample.\n */\n// const subscriptionNameOrId = 'YOUR_SUBSCRIPTION_NAME_OR_ID';\n// const timeout = 60;\n\n// Imports the Google Cloud client library\nconst { PubSub, Schema, Encodings } = require(\"@google-cloud/pubsub\");\n\n// Node FS library, to load definitions\nconst fs = require(\"fs\");\n\n// And the Apache Avro library\nconst avro = require(\"avro-js\");\n\n// Creates a client; cache this for further use\nconst pubSubClient = new PubSub();\n\nfunction listenForAvroRecords(subscriptionNameOrId, timeout) {\n  // References an existing subscription\n  const subscription = pubSubClient.subscription(subscriptionNameOrId);\n\n  // Make an encoder using the official avro-js library.\n  const definition = fs.\n  readFileSync('system-test/fixtures/provinces.avsc').\n  toString();\n  const type = avro.parse(definition);\n\n  // Create an event handler to handle messages\n  let messageCount = 0;\n  const messageHandler = async (message) => {\n    // \"Ack\" (acknowledge receipt of) the message\n    message.ack();\n\n    // Get the schema metadata from the message.\n    const schemaMetadata = Schema.metadataFromMessage(message.attributes);\n\n    let result;\n    switch (schemaMetadata.encoding) {\n      case Encodings.Binary:\n        result = type.fromBuffer(message.data);\n        break;\n      case Encodings.Json:\n        result = type.fromString(message.data.toString());\n        break;\n      default:\n        console.log(`Unknown schema encoding: ${schemaMetadata.encoding}`);\n        break;}\n\n\n    console.log(`Received message ${message.id}:`);\n    console.log(`\\tData: ${JSON.stringify(result, null, 4)}`);\n    console.log(`\\tAttributes: ${message.attributes}`);\n    messageCount += 1;\n  };\n\n  // Listen for new messages until timeout is hit\n  subscription.on('message', messageHandler);\n\n  setTimeout(() => {\n    subscription.removeListener('message', messageHandler);\n    console.log(`${messageCount} message(s) received.`);\n  }, timeout * 1000);\n}\n// [END pubsub_subscribe_avro_records]\n\nfunction main(\nsubscriptionNameOrId = 'YOUR_SUBSCRIPTION_NAME_OR_ID',\ntimeout = 60)\n{\n  timeout = Number(timeout);\n\n  try {\n    listenForAvroRecords(subscriptionNameOrId, timeout);\n  } catch (err) {\n    console.error(err.message);\n    process.exitCode = 1;\n  }\n}\n\nmain(...process.argv.slice(2));",
+  "// Copyright 2019-2021 Google LLC\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n//      http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\n// This is a generated sample, using the typeless sample bot. Please\n// look for the source TypeScript sample (.ts) for modifications.\n'use strict';\n\n/**\n * This application demonstrates how to perform basic operations on\n * subscriptions with the Google Cloud Pub/Sub API.\n *\n * For more information, see the README.md under /pubsub and the documentation\n * at https://cloud.google.com/pubsub/docs.\n */\n\n// sample-metadata:\n//   title: Listen For Avro Records\n//   description: Listens for records in Avro encoding from a subscription.\n//   usage: node listenForAvroRecords.js <subscription-name-or-id> [timeout-in-seconds]\n\n// [START pubsub_subscribe_avro_records]\n/**\n * TODO(developer): Uncomment these variables before running the sample.\n */\n// const subscriptionNameOrId = 'YOUR_SUBSCRIPTION_NAME_OR_ID';\n// const timeout = 60;\n\n// Imports the Google Cloud client library\nconst { PubSub, Schema, Encodings } = require(\"@google-cloud/pubsub\");\n\n// Node FS library, to load definitions\nconst fs = require(\"fs\");\n\n// And the Apache Avro library\nconst avro = require(\"avro-js\");\n\n// Creates a client; cache this for further use\nconst pubSubClient = new PubSub();\n\nfunction listenForAvroRecords(subscriptionNameOrId, timeout) {\n  // References an existing subscription\n  const subscription = pubSubClient.subscription(subscriptionNameOrId);\n\n  // Make an encoder using the official avro-js library.\n  const definition = fs.\n  readFileSync('system-test/fixtures/provinces.avsc').\n  toString();\n  const type = avro.parse(definition);\n\n  // Create an event handler to handle messages\n  let messageCount = 0;\n  const messageHandler = async (message) => {\n    // \"Ack\" (acknowledge receipt of) the message\n    message.ack();\n\n    // Get the schema metadata from the message.\n    const schemaMetadata = Schema.metadataFromMessage(message.attributes);\n\n    let result;\n    switch (schemaMetadata.encoding) {\n      case Encodings.Binary:\n        result = type.fromBuffer(message.data);\n        break;\n      case Encodings.Json:\n        result = type.fromString(message.data.toString());\n        break;\n      default:\n        console.log(`Unknown schema encoding: ${schemaMetadata.encoding}`);\n        break;}\n\n\n    console.log(`Received message ${message.id}:`);\n    console.log(`\\tData: ${JSON.stringify(result, null, 4)}`);\n    console.log(`\\tAttributes: ${message.attributes}`);\n    messageCount += 1;\n  };\n\n  // Listen for new messages until timeout is hit\n  subscription.on('message', messageHandler);\n\n  setTimeout(() => {\n    subscription.removeListener('message', messageHandler);\n    console.log(`${messageCount} message(s) received.`);\n  }, timeout * 1000);\n\n  use.optional.chaining();\n}\n// [END pubsub_subscribe_avro_records]\n\nfunction main(\nsubscriptionNameOrId = 'YOUR_SUBSCRIPTION_NAME_OR_ID',\ntimeout = 60)\n{\n  timeout = Number(timeout);\n\n  try {\n    listenForAvroRecords(subscriptionNameOrId, timeout);\n  } catch (err) {\n    console.error(err.message);\n    process.exitCode = 1;\n  }\n}\n\nmain(...process.argv.slice(2));",
   "// Copyright 2019-2021 Google LLC\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n//     https://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\n// This is a generated sample, using the typeless sample bot. Please\n// look for the source TypeScript sample (.ts) for modifications.\n'use strict';\n\n/**\n * This sample demonstrates how to perform basic operations on topics with\n * the Google Cloud Pub/Sub API.\n *\n * For more information, see the README.md under /pubsub and the documentation\n * at https://cloud.google.com/pubsub/docs.\n */\n\n// sample-metadata:\n//   title: Publish Avro Records to a Topic\n//   description: Publishes a record in Avro to a topic with a schema.\n//   usage: node publishAvroRecords.js <topic-name>\n\n// [START pubsub_publish_avro_records]\n/**\n * TODO(developer): Uncomment this variable before running the sample.\n */\n// const topicNameOrId = 'YOUR_TOPIC_NAME_OR_ID';\n\n// Imports the Google Cloud client library\nconst { PubSub, Encodings } = require(\"@google-cloud/pubsub\");\n\n// And the Apache Avro library\nconst avro = require(\"avro-js\");\nconst fs = require(\"fs\");\n\n// Creates a client; cache this for further use\nconst pubSubClient = new PubSub();\n\n\n\n\n\n\nasync function publishAvroRecords(topicNameOrId) {\n  // Get the topic metadata to learn about its schema encoding.\n  const topic = pubSubClient.topic(topicNameOrId);\n  const [topicMetadata] = await topic.getMetadata();\n  const topicSchemaMetadata = topicMetadata.schemaSettings;\n\n  if (!topicSchemaMetadata) {\n    console.log(`Topic ${topicNameOrId} doesn't seem to have a schema.`);\n    return;\n  }\n  const schemaEncoding = topicSchemaMetadata.encoding;\n\n  // Make an encoder using the official avro-js library.\n  const definition = fs.\n  readFileSync('system-test/fixtures/provinces.avsc').\n  toString();\n  const type = avro.parse(definition);\n\n  // Encode the message.\n  const province = {\n    name: 'Ontario',\n    post_abbr: 'ON'\n  };\n  let dataBuffer;\n  switch (schemaEncoding) {\n    case Encodings.Binary:\n      dataBuffer = type.toBuffer(province);\n      break;\n    case Encodings.Json:\n      dataBuffer = Buffer.from(type.toString(province));\n      break;\n    default:\n      console.log(`Unknown schema encoding: ${schemaEncoding}`);\n      break;}\n\n  if (!dataBuffer) {\n    console.log(`Invalid encoding ${schemaEncoding} on the topic.`);\n    return;\n  }\n\n  const messageId = await topic.publish(dataBuffer);\n  console.log(`Avro record ${messageId} published.`);\n}\n// [END pubsub_publish_avro_records]\n\nfunction main(topicNameOrId = 'YOUR_TOPIC_NAME_OR_ID') {\n  publishAvroRecords(topicNameOrId).catch((err) => {\n    console.error(err.message);\n    process.exitCode = 1;\n  });\n}\n\nmain(...process.argv.slice(2));"
 ]
 
diff --git a/packages/typeless-sample-bot/src/samples.ts b/packages/typeless-sample-bot/src/samples.ts
index b8e731a15a7..228afc9d6ca 100644
--- a/packages/typeless-sample-bot/src/samples.ts
+++ b/packages/typeless-sample-bot/src/samples.ts
@@ -23,6 +23,7 @@ import path from 'node:path';
 import {typescript as presetTypescript} from './preset-loader.js';
 import importToRequire from './transforms/import-to-require.js';
 import nullCoalescing from './transforms/null-coalescing.js';
+import optionalChaining from './transforms/optional-chaining.js';
 import {addComments} from './transforms/add-comments.js';
 
 // Converts an async iterable into an array of the same type.
@@ -85,7 +86,7 @@ export async function* filterByContents(
 // the transform process.
 const babelConfig = {
   presets: [[presetTypescript, {}]],
-  plugins: [[importToRequire], [nullCoalescing]],
+  plugins: [[importToRequire], [nullCoalescing], [optionalChaining]],
   parserOpts: {} as babel.ParserOptions,
   generatorOpts: {
     // Ensures that Babel keeps newlines so that comments end up
diff --git a/packages/typeless-sample-bot/src/transforms/optional-chaining.ts b/packages/typeless-sample-bot/src/transforms/optional-chaining.ts
new file mode 100644
index 00000000000..e39bbdf2179
--- /dev/null
+++ b/packages/typeless-sample-bot/src/transforms/optional-chaining.ts
@@ -0,0 +1,48 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import * as Babel from '@babel/types';
+import {NodePathSingle, VisitorPlugin} from './babel.js';
+
+// Because optional chaining is still a proposal in many versions of Node,
+// go ahead and convert it to plain '.'. It should work in TypeScript.
+export default function optionalChaining(): VisitorPlugin {
+  return {
+    visitor: {
+      OptionalCallExpression(path: NodePathSingle) {
+        const node = path.node as Babel.OptionalCallExpression;
+        path.replaceWith(Babel.callExpression(node.callee, node.arguments));
+      },
+      OptionalMemberExpression(path: NodePathSingle) {
+        const node = path.node as Babel.OptionalMemberExpression;
+        path.replaceWith(
+          Babel.memberExpression(
+            node.object,
+            node.property,
+            node.computed,
+            node.optional
+          )
+        );
+      },
+      LogicalExpression(path: NodePathSingle) {
+        const node = path.node as Babel.LogicalExpression;
+        if (node.operator === '??') {
+          path.replaceWith(
+            Babel.logicalExpression('||', node.left, node.right)
+          );
+        }
+      },
+    },
+  };
+}
diff --git a/packages/typeless-sample-bot/test/fixtures/folder/listenForAvroRecords.ts b/packages/typeless-sample-bot/test/fixtures/folder/listenForAvroRecords.ts
index f479e04c13b..b363885b6fd 100644
--- a/packages/typeless-sample-bot/test/fixtures/folder/listenForAvroRecords.ts
+++ b/packages/typeless-sample-bot/test/fixtures/folder/listenForAvroRecords.ts
@@ -89,6 +89,8 @@ function listenForAvroRecords(subscriptionNameOrId: string, timeout: number) {
     subscription.removeListener('message', messageHandler);
     console.log(`${messageCount} message(s) received.`);
   }, timeout * 1000);
+
+  use?.optional?.chaining?.();
 }
 // [END pubsub_subscribe_avro_records]