diff --git a/apps/meteor/app/apps/server/converters/uploads.js b/apps/meteor/app/apps/server/converters/uploads.js
deleted file mode 100644
index 60f85a8aa72f1..0000000000000
--- a/apps/meteor/app/apps/server/converters/uploads.js
+++ /dev/null
@@ -1,98 +0,0 @@
-import { Uploads } from '@rocket.chat/models';
-
-import { transformMappedData } from './transformMappedData';
-
-export class AppUploadsConverter {
-	constructor(orch) {
-		this.orch = orch;
-	}
-
-	async convertById(id) {
-		const upload = await Uploads.findOneById(id);
-
-		return this.convertToApp(upload);
-	}
-
-	async convertToApp(upload) {
-		if (!upload) {
-			return undefined;
-		}
-
-		const map = {
-			id: '_id',
-			name: 'name',
-			size: 'size',
-			type: 'type',
-			store: 'store',
-			description: 'description',
-			complete: 'complete',
-			uploading: 'uploading',
-			extension: 'extension',
-			progress: 'progress',
-			etag: 'etag',
-			path: 'path',
-			token: 'token',
-			url: 'url',
-			updatedAt: '_updatedAt',
-			uploadedAt: 'uploadedAt',
-			room: async (upload) => {
-				const result = await this.orch.getConverters().get('rooms').convertById(upload.rid);
-				delete upload.rid;
-				return result;
-			},
-			user: async (upload) => {
-				if (!upload.userId) {
-					return undefined;
-				}
-
-				const result = await this.orch.getConverters().get('users').convertById(upload.userId);
-				delete upload.userId;
-				return result;
-			},
-			visitor: async (upload) => {
-				if (!upload.visitorToken) {
-					return undefined;
-				}
-
-				const result = await this.orch.getConverters().get('visitors').convertByToken(upload.visitorToken);
-				delete upload.visitorToken;
-				return result;
-			},
-		};
-
-		return transformMappedData(upload, map);
-	}
-
-	convertToRocketChat(upload) {
-		if (!upload) {
-			return undefined;
-		}
-
-		const { id: userId } = upload.user || {};
-		const { token: visitorToken } = upload.visitor || {};
-		const { id: rid } = upload.room;
-
-		const newUpload = {
-			_id: upload.id,
-			name: upload.name,
-			size: upload.size,
-			type: upload.type,
-			extension: upload.extension,
-			description: upload.description,
-			store: upload.store,
-			etag: upload.etag,
-			complete: upload.complete,
-			uploading: upload.uploading,
-			progress: upload.progress,
-			token: upload.token,
-			url: upload.url,
-			_updatedAt: upload.updatedAt,
-			uploadedAt: upload.uploadedAt,
-			rid,
-			userId,
-			visitorToken,
-		};
-
-		return Object.assign(newUpload, upload._unmappedProperties_);
-	}
-}
diff --git a/apps/meteor/app/apps/server/converters/uploads.ts b/apps/meteor/app/apps/server/converters/uploads.ts
new file mode 100644
index 0000000000000..abc25f8e1c2e5
--- /dev/null
+++ b/apps/meteor/app/apps/server/converters/uploads.ts
@@ -0,0 +1,125 @@
+import type { IUpload } from '@rocket.chat/core-typings';
+import type { IUpload as IAppsUpload } from '@rocket.chat/apps-engine/definition/uploads';
+import { Uploads } from '@rocket.chat/models';
+
+import { transformMappedData } from './transformMappedData';
+
+interface IConverters {
+	get(name: 'rooms'): { convertById(id: string): Promise<IAppsUpload['room']| undefined> };
+	get(name: 'users'): { convertById(id: string): Promise<IAppsUpload['user']| undefined> };
+	get(name: 'visitors'): { convertByToken(token: string): Promise<IAppsUpload['visitor']| undefined> };
+}
+
+interface IOrchestrator {
+	getConverters(): IConverters;
+}
+
+type AppUploadWithUnmapped = IAppsUpload & { _unmappedProperties_?: Partial<IUpload> };
+type IUploadWithVisitorToken = IUpload & { visitorToken?: string };
+type IAppsUploadWithDescription = IAppsUpload & { description?: string };              
+
+export class AppUploadsConverter {
+	private orch: IOrchestrator;
+
+	constructor(orch: IOrchestrator) {
+		this.orch = orch;
+	}
+
+	async convertById(id: string): Promise<IAppsUpload | undefined> {
+		const upload = await Uploads.findOneById(id);
+
+		return this.convertToApp(upload ?? undefined);
+	}
+
+	async convertToApp(upload: IUpload | undefined): Promise<IAppsUpload | undefined> {
+		if (!upload) {
+			return undefined;
+		}
+
+		const map = {
+			id: '_id',
+			name: 'name',
+			size: 'size',
+			type: 'type',
+			store: 'store',
+			description: 'description',
+			complete: 'complete',
+			uploading: 'uploading',
+			extension: 'extension',
+			progress: 'progress',
+			etag: 'etag',
+			path: 'path',
+			token: 'token',
+			url: 'url',
+			updatedAt: '_updatedAt',
+			uploadedAt: 'uploadedAt',
+			room: async (upload: IUpload) => {
+				if (!upload.rid) {
+					throw new Error('Invalid upload payload: missing rid');
+				}
+				const result = await this.orch.getConverters().get('rooms').convertById(upload.rid);
+				delete (upload as Partial<IUpload>).rid;              
+				return result;
+			},
+			user: async (upload: IUpload) => {
+				if (!upload.userId) {
+					return undefined;
+				}
+
+				const result = await this.orch.getConverters().get('users').convertById(upload.userId);
+				delete (upload as Partial<IUpload>).userId;           
+				return result;
+			},
+			visitor: async (upload: IUpload) => {
+				const uploadWithToken = upload as IUploadWithVisitorToken;
+				if (!uploadWithToken.visitorToken) {
+					return undefined;
+				}
+				const result = await this.orch.getConverters().get('visitors').convertByToken(uploadWithToken.visitorToken);
+				delete (upload as IUploadWithVisitorToken).visitorToken;
+				return result;
+			},
+		};
+
+		return transformMappedData(upload, map) as unknown as IAppsUpload;
+	}
+
+	convertToRocketChat(upload: IAppsUpload | undefined): IUpload | undefined {
+		if (!upload) {
+			return undefined;
+		}
+
+		const rid = upload.room?.id;
+		if (!rid) {
+			throw new Error('Invalid app upload payload: missing room.id');
+		}
+
+		const { id: userId } = upload.user ?? {};
+		const { token: visitorToken } = upload.visitor ?? {};
+		const uploadWithExtras = upload as IAppsUploadWithDescription & { path?: IUpload['path'] };
+
+		const newUpload: Record<string, unknown> = {
+			_id: upload.id,
+			name: upload.name,
+			size: upload.size !== undefined ? Number(upload.size) : undefined,
+			type: upload.type,
+			extension: upload.extension,
+			description: uploadWithExtras.description,
+			path: uploadWithExtras.path,
+			store: upload.store,
+			etag: upload.etag,
+			complete: upload.complete,
+			uploading: upload.uploading,
+			progress: upload.progress,
+			token: upload.token,
+			url: upload.url,
+			_updatedAt: upload.updatedAt,
+			uploadedAt: upload.uploadedAt,
+			rid,
+			userId,
+			visitorToken,
+		};
+
+		return Object.assign(newUpload, (upload as AppUploadWithUnmapped)._unmappedProperties_) as IUpload;
+	}
+}
\ No newline at end of file