diff --git a/backend/tests/integration/api/recordings/start-recording.test.ts b/backend/tests/integration/api/recordings/start-recording.test.ts
new file mode 100644
index 0000000..3145aaf
--- /dev/null
+++ b/backend/tests/integration/api/recordings/start-recording.test.ts
@@ -0,0 +1,212 @@
+import { describe, it, expect, beforeAll, afterAll, afterEach } from '@jest/globals';
+import {
+	deleteAllRecordings,
+	deleteAllRooms,
+	disconnectFakeParticipants,
+	joinFakeParticipant,
+	startRecording,
+	startTestServer,
+	stopAllRecordings,
+	stopRecording,
+	stopTestServer
+} from '../../../utils/helpers.js';
+import { setInternalConfig } from '../../../../src/config/internal-config.js';
+
+import { errorRoomNotFound } from '../../../../src/models/error.model.js';
+import {
+	expectValidRecordingLocationHeader,
+	expectValidStartRecordingResponse,
+	expectValidStopRecordingResponse
+} from '../../../utils/assertion-helpers.js';
+import { setupMultiRoomTestContext, TestContext } from '../../../utils/test-scenarios.js';
+import { MeetRoom } from '../../../../src/typings/ce/room.js';
+
+describe('Recording API Tests', () => {
+	let context: TestContext | null = null;
+	let room: MeetRoom, moderatorCookie: string;
+
+	beforeAll(async () => {
+		await startTestServer();
+	});
+
+	afterAll(async () => {
+		await stopAllRecordings(moderatorCookie);
+		await disconnectFakeParticipants();
+		await deleteAllRooms();
+		await deleteAllRecordings();
+		await stopTestServer();
+	});
+
+	describe('Start Recording Tests', () => {
+		beforeAll(async () => {
+			// Create a room and join a participant
+			context = await setupMultiRoomTestContext(1, true);
+			({ room, moderatorCookie } = context.getRoomByIndex(0)!);
+		});
+
+		afterAll(async () => {
+			await disconnectFakeParticipants();
+			await deleteAllRooms();
+			await deleteAllRecordings();
+			context = null;
+		});
+
+		it('should return 201 with proper response and location header when recording starts successfully', async () => {
+			const response = await startRecording(room.roomId, moderatorCookie);
+			const recordingId = response.body.recordingId;
+			expectValidStartRecordingResponse(response, room.roomId);
+
+			expectValidRecordingLocationHeader(response);
+			const stopResponse = await stopRecording(recordingId, moderatorCookie);
+			expectValidStopRecordingResponse(stopResponse, recordingId, room.roomId);
+		});
+
+		it('should successfully start recording, stop it, and start again (sequential operations)', async () => {
+			const firstStartResponse = await startRecording(room.roomId, moderatorCookie);
+			const firstRecordingId = firstStartResponse.body.recordingId;
+
+			expectValidStartRecordingResponse(firstStartResponse, room.roomId);
+
+			const firstStopResponse = await stopRecording(firstRecordingId, moderatorCookie);
+			expectValidStopRecordingResponse(firstStopResponse, firstRecordingId, room.roomId);
+
+			const secondStartResponse = await startRecording(room.roomId, moderatorCookie);
+			expectValidStartRecordingResponse(secondStartResponse, room.roomId);
+			const secondRecordingId = secondStartResponse.body.recordingId;
+
+			const secondStopResponse = await stopRecording(secondRecordingId, moderatorCookie);
+			expectValidStopRecordingResponse(secondStopResponse, secondRecordingId, room.roomId);
+		});
+
+		it('should handle simultaneous recordings in different rooms correctly', async () => {
+			const context = await setupMultiRoomTestContext(2, true);
+
+			const roomDataA = context.getRoomByIndex(0)!;
+			const roomDataB = context.getRoomByIndex(1)!;
+
+			const firstResponse = await startRecording(roomDataA.room.roomId, roomDataA.moderatorCookie);
+			const secondResponse = await startRecording(roomDataB.room.roomId, roomDataB.moderatorCookie);
+
+			expectValidStartRecordingResponse(firstResponse, roomDataA.room.roomId);
+			expectValidStartRecordingResponse(secondResponse, roomDataB.room.roomId);
+
+			const firstRecordingId = firstResponse.body.recordingId;
+			const secondRecordingId = secondResponse.body.recordingId;
+
+			const [firstStopResponse, secondStopResponse] = await Promise.all([
+				stopRecording(firstRecordingId, roomDataA.moderatorCookie),
+				stopRecording(secondRecordingId, roomDataB.moderatorCookie)
+			]);
+			expectValidStopRecordingResponse(firstStopResponse, firstRecordingId, roomDataA.room.roomId);
+			expectValidStopRecordingResponse(secondStopResponse, secondRecordingId, roomDataB.room.roomId);
+		});
+	});
+
+	describe('Start Recording Validation failures', () => {
+		beforeAll(async () => {
+			// Create a room without participants
+			context = await setupMultiRoomTestContext(1, false);
+			({ room, moderatorCookie } = context.getRoomByIndex(0)!);
+		});
+
+		afterEach(async () => {
+			await disconnectFakeParticipants();
+			await stopAllRecordings(moderatorCookie);
+		});
+
+		it('should accept valid roomId but reject with 409', async () => {
+			const response = await startRecording(room.roomId, moderatorCookie);
+			// Room exists but it has no participants
+			expect(response.status).toBe(409);
+			expect(response.body.message).toContain(`The room '${room.roomId}' has no participants`);
+		});
+
+		it('should sanitize roomId and reject the request with 409 due to no participants', async () => {
+			const malformedRoomId = '  .<!?' + room.roomId + '  ';
+			const response = await startRecording(malformedRoomId, moderatorCookie);
+
+			console.log('Response:', response.body);
+			expect(response.status).toBe(409);
+			expect(response.body.message).toContain(`The room '${room.roomId}' has no participants`);
+		});
+
+		it('should reject request with roomId that becomes empty after sanitization', async () => {
+			const response = await startRecording('!@#$%^&*()', moderatorCookie);
+
+			expect(response.status).toBe(422);
+			expect(response.body.details).toEqual(
+				expect.arrayContaining([
+					expect.objectContaining({
+						field: 'roomId',
+						message: expect.stringContaining('cannot be empty after sanitization')
+					})
+				])
+			);
+		});
+
+		it('should reject request with non-string roomId', async () => {
+			const response = await startRecording(123 as unknown as string, moderatorCookie);
+
+			expect(response.status).toBe(422);
+			expect(response.body.details).toEqual(
+				expect.arrayContaining([
+					expect.objectContaining({
+						field: 'roomId',
+						message: expect.stringContaining('Expected string')
+					})
+				])
+			);
+		});
+
+		it('should reject request with very long roomId', async () => {
+			const longRoomId = 'a'.repeat(101);
+			const response = await startRecording(longRoomId, moderatorCookie);
+
+			expect(response.status).toBe(422);
+			expect(response.body.details).toEqual(
+				expect.arrayContaining([
+					expect.objectContaining({
+						field: 'roomId',
+						message: expect.stringContaining('cannot exceed 100 characters')
+					})
+				])
+			);
+		});
+
+		it('should handle room that does not exist', async () => {
+			const response = await startRecording('non-existing-room-id', moderatorCookie);
+			const error = errorRoomNotFound('non-existing-room-id');
+			expect(response.status).toBe(404);
+			expect(response.body).toEqual({
+				name: error.name,
+				message: error.message
+			});
+		});
+
+		it('should return 409 when recording is already in progress', async () => {
+			await joinFakeParticipant(room.roomId, 'fakeParticipantId');
+			const firstResponse = await startRecording(room.roomId, moderatorCookie);
+			const recordingId = firstResponse.body.recordingId;
+			expectValidStartRecordingResponse(firstResponse, room.roomId);
+
+			const secondResponse = await startRecording(room!.roomId, moderatorCookie);
+			expect(secondResponse.status).toBe(409);
+			expect(secondResponse.body.message).toContain('already');
+			const stopResponse = await stopRecording(recordingId, moderatorCookie);
+			expectValidStopRecordingResponse(stopResponse, recordingId, room.roomId);
+		});
+
+		it('should return 503 when recording start times out', async () => {
+			setInternalConfig({
+				RECORDING_STARTED_TIMEOUT: '1s'
+			});
+			await joinFakeParticipant(room.roomId, 'fakeParticipantId');
+			const response = await startRecording(room.roomId, moderatorCookie);
+			expect(response.status).toBe(503);
+			expect(response.body.message).toContain('timed out while starting');
+			setInternalConfig({
+				RECORDING_STARTED_TIMEOUT: '30s'
+			});
+		});
+	});
+});
diff --git a/backend/tests/utils/assertion-helpers.ts b/backend/tests/utils/assertion-helpers.ts
new file mode 100644
index 0000000..60d5a6a
--- /dev/null
+++ b/backend/tests/utils/assertion-helpers.ts
@@ -0,0 +1,39 @@
+import { expect } from '@jest/globals';
+import INTERNAL_CONFIG from '../../src/config/internal-config';
+const RECORDINGS_PATH = `${INTERNAL_CONFIG.INTERNAL_API_BASE_PATH_V1}/recordings`;
+
+export const expectValidRecordingLocationHeader = (response: any) => {
+	// const locationRegex = new RegExp(
+	// 	`^http://127\\.0\\.0\\.1:\\d+/+${RECORDINGS_PATH.replace(/\//g, '\\/')}/${recordingId}$`
+	// );
+	// expect(response.headers.location).toMatch(locationRegex);
+	expect(response.headers.location).toBeDefined();
+	expect(response.headers.location).toContain('127.0.0.1');
+	expect(response.headers.location).toContain(RECORDINGS_PATH);
+	expect(response.headers.location).toContain(response.body.recordingId);
+};
+
+export const expectValidStartRecordingResponse = (response: any, roomId: string) => {
+	expect(response.status).toBe(201);
+	expect(response.body).toHaveProperty('recordingId');
+	const recordingId = response.body.recordingId;
+	expect(recordingId).toContain(roomId);
+	expect(response.body).toHaveProperty('roomId', roomId);
+	expect(response.body).toHaveProperty('startDate');
+	expect(response.body).toHaveProperty('status', 'ACTIVE');
+	expect(response.body).toHaveProperty('filename');
+	expect(response.body).not.toHaveProperty('duration');
+	expect(response.body).not.toHaveProperty('endDate');
+	expect(response.body).not.toHaveProperty('size');
+};
+
+export const expectValidStopRecordingResponse = (response: any, recordingId: string, roomId: string) => {
+	expect(response.status).toBe(202);
+	expect(response.body).toBeDefined();
+	expect(response.body).toHaveProperty('recordingId', recordingId);
+	expect(response.body).toHaveProperty('status', 'ENDING');
+	expect(response.body).toHaveProperty('roomId', roomId);
+	expect(response.body).toHaveProperty('filename');
+	expect(response.body).toHaveProperty('startDate');
+	expect(response.body).toHaveProperty('duration', expect.any(Number));
+};
diff --git a/backend/tests/utils/helpers.ts b/backend/tests/utils/helpers.ts
index 2c4a310..523635a 100644
--- a/backend/tests/utils/helpers.ts
+++ b/backend/tests/utils/helpers.ts
@@ -20,6 +20,8 @@ import INTERNAL_CONFIG from '../../src/config/internal-config.js';
 import { ChildProcess, execSync, spawn } from 'child_process';
 import { container } from '../../src/config/dependency-injector.config.js';
 import { RoomService } from '../../src/services/room.service.js';
+import { MeetRoomHelper } from '../../src/helpers/room.helper.js';
+import { RecordingService } from '../../src/services/recording.service.js';
 
 const CREDENTIALS = {
 	user: {
@@ -288,6 +290,15 @@ export const runRoomGarbageCollector = async () => {
 	await sleep(1000);
 };
 
+export const runReleaseActiveRecordingLock = async (roomId: string) => {
+	if (!app) {
+		throw new Error('App instance is not defined');
+	}
+
+	const recordingService = container.get(RecordingService);
+	await recordingService.releaseRoomRecordingActiveLock(roomId);
+};
+
 /**
  * Deletes all rooms
  */
@@ -362,7 +373,7 @@ export const generateParticipantToken = async (
  * @param roomId The ID of the room to join
  * @param participantName The name for the fake participant
  */
-export const joinFakeParticipant = (roomId: string, participantName: string) => {
+export const joinFakeParticipant = async (roomId: string, participantName: string) => {
 	// Step 1: Manually create the LiveKit room
 	// In normal operation, the room is created when a real participant requests a token,
 	// but for testing we need to create it ourselves since we're bypassing the token flow.
@@ -396,15 +407,115 @@ export const joinFakeParticipant = (roomId: string, participantName: string) =>
 
 	// Store the process to be able to terminate it later
 	fakeParticipantsProcesses.set(participantName, process);
+	await sleep(1000);
 };
 
-export const disconnectFakeParticipants = () => {
+export const disconnectFakeParticipants = async () => {
 	fakeParticipantsProcesses.forEach((process, participantName) => {
 		process.kill();
 		console.log(`Stopped process for participant ${participantName}`);
 	});
 
 	fakeParticipantsProcesses.clear();
+	await sleep(1000);
+};
+
+export const startRecording = async (roomId: string, moderatorCookie = '') => {
+	if (!app) {
+		throw new Error('App instance is not defined');
+	}
+
+	return await request(app)
+		.post(`${INTERNAL_CONFIG.INTERNAL_API_BASE_PATH_V1}/recordings`)
+		.set('Cookie', moderatorCookie)
+		.send({
+			roomId
+		});
+};
+
+export const stopRecording = async (recordingId: string, moderatorCookie = '') => {
+	if (!app) {
+		throw new Error('App instance is not defined');
+	}
+
+	const response = await request(app)
+		.post(`${INTERNAL_CONFIG.INTERNAL_API_BASE_PATH_V1}/recordings/${recordingId}/stop`)
+		.set('Cookie', moderatorCookie)
+		.send();
+	await sleep(2500);
+
+	return response;
+};
+
+export const stopAllRecordings = async (moderatorCookie: string) => {
+	if (!app) {
+		throw new Error('App instance is not defined');
+	}
+
+	const response = await getAllRecordings({ fields: 'recordingId' });
+	const recordingIds: string[] = response.body.recordings.map(
+		(recording: { recordingId: string }) => recording.recordingId
+	);
+
+	if (recordingIds.length === 0) {
+		return;
+	}
+
+	console.log(`Stopping ${recordingIds.length} recordings...`);
+	const tasks = recordingIds.map((recordingId: string) =>
+		request(app)
+			.post(`${INTERNAL_CONFIG.INTERNAL_API_BASE_PATH_V1}/recordings/${recordingId}/stop`)
+			.set('Cookie', moderatorCookie)
+			.send()
+	);
+	await Promise.all(tasks);
+	await sleep(1000); // Wait for 1 second
+};
+
+export const getAllRecordings = async (query: Record<string, any> = {}) => {
+	if (!app) {
+		throw new Error('App instance is not defined');
+	}
+
+	return await request(app)
+		.get(`${INTERNAL_CONFIG.API_BASE_PATH_V1}/recordings`)
+		.set(INTERNAL_CONFIG.API_KEY_HEADER, MEET_API_KEY)
+		.query(query);
+};
+
+export const deleteAllRecordings = async () => {
+	if (!app) {
+		throw new Error('App instance is not defined');
+	}
+
+	let nextPageToken: string | undefined;
+
+	do {
+		const response: any = await getAllRecordings({
+			fields: 'recordingId',
+			maxItems: 100,
+			nextPageToken
+		});
+		expect(response.status).toBe(200);
+
+		nextPageToken = response.body.pagination?.nextPageToken ?? undefined;
+		const recordingIds = response.body.recordings.map(
+			(recording: { recordingId: string }) => recording.recordingId
+		);
+
+		if (recordingIds.length === 0) {
+			break;
+		}
+
+		console.log(`Deleting ${recordingIds.length} recordings...`);
+		console.log('Recording IDs:', recordingIds);
+		await request(app)
+			.delete(`${INTERNAL_CONFIG.API_BASE_PATH_V1}/recordings`)
+			.query({ recordingIds: recordingIds.join(',')})
+			.set(INTERNAL_CONFIG.API_KEY_HEADER, MEET_API_KEY);
+
+		await sleep(1000); // Wait for 1 second
+	} while (nextPageToken);
 };
 
 // PRIVATE METHODS
diff --git a/backend/tests/utils/test-scenarios.ts b/backend/tests/utils/test-scenarios.ts
new file mode 100644
index 0000000..c624661
--- /dev/null
+++ b/backend/tests/utils/test-scenarios.ts
@@ -0,0 +1,61 @@
+import { MeetRoomHelper } from '../../src/helpers';
+import { createRoom, loginUserAsRole, generateParticipantToken, joinFakeParticipant } from './helpers';
+
+import { UserRole } from '../../src/typings/ce';
+
+export interface RoomData {
+	room: any;
+	moderatorCookie: string;
+	moderatorSecret: string;
+	recordingId?: string;
+}
+
+export interface TestContext {
+	rooms: RoomData[];
+	getRoomByIndex(index: number): RoomData | undefined;
+}
+
+/**
+ * Configura un escenario de prueba con dos salas para pruebas de grabación concurrente
+ */
+export async function setupMultiRoomTestContext(numRooms: number, withParticipants: boolean): Promise<TestContext> {
+	const adminCookie = await loginUserAsRole(UserRole.ADMIN);
+	const rooms: RoomData[] = [];
+
+	// Create additional rooms
+	for (let i = 0; i < numRooms; i++) {
+		const room = await createRoom({
+			roomIdPrefix: `test-recording-room-${i + 1}`
+		});
+		const { moderatorSecret } = MeetRoomHelper.extractSecretsFromRoom(room);
+		const moderatorCookie = await generateParticipantToken(
+			adminCookie,
+			room.roomId,
+			`Moderator-${i + 1}`,
+			moderatorSecret
+		);
+
+		if (withParticipants) {
+			const participantId = `TEST_P-${i + 1}`;
+
+			await joinFakeParticipant(room.roomId, participantId);
+		}
+
+		rooms.push({
+			room,
+			moderatorCookie,
+			moderatorSecret
+		});
+	}
+
+	return {
+		rooms,
+		getRoomByIndex: (index: number) => {
+			if (index < 0 || index >= rooms.length) {
+				return undefined;
+			}
+
+			return rooms[index];
+		}
+	};
+}