diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 65d51cd..28e4f43 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -27,6 +27,8 @@ jobs:
           node-version: 23
       - name: Install dependencies
         run: npm install --legacy-peer-deps
+      - name: Install prisma
+        run: npx prisma generate
       - name: Build codebase
         run: npm run build
 
diff --git a/backend/__test__/utils.ts b/backend/__test__/utils.ts
new file mode 100644
index 0000000..86f94c6
--- /dev/null
+++ b/backend/__test__/utils.ts
@@ -0,0 +1,5 @@
+export const generateMockRequest = (payload: object) => {
+  return {
+    json: async () => payload,
+  };
+};
diff --git a/backend/app/api/user/register/route.test.ts b/backend/app/api/user/register/route.test.ts
new file mode 100644
index 0000000..0c0b133
--- /dev/null
+++ b/backend/app/api/user/register/route.test.ts
@@ -0,0 +1,28 @@
+import { prismaMock } from '@/__test__/singleton';
+import { User } from '@prisma/client';
+import { POST } from './route';
+import { generateMockRequest } from '@/__test__/utils';
+import { NextRequest } from 'next/server';
+
+test('Register route returns intended user', async () => {
+  const temporaryUser: User = {
+    id: 1,
+    username: 'test',
+    createdAt: new Date(),
+    updatedAt: new Date(),
+  };
+
+  prismaMock.user.create.mockResolvedValue(temporaryUser);
+
+  const req = generateMockRequest(temporaryUser);
+  const res = await POST(req as NextRequest);
+  const data = await res.json();
+
+  const expected = {
+    ...temporaryUser,
+    updatedAt: temporaryUser.updatedAt.toISOString(),
+    createdAt: temporaryUser.createdAt.toISOString(),
+  };
+
+  expect(data.user).toEqual(expected);
+});
diff --git a/backend/app/api/user/register/route.ts b/backend/app/api/user/register/route.ts
new file mode 100644
index 0000000..144301b
--- /dev/null
+++ b/backend/app/api/user/register/route.ts
@@ -0,0 +1,25 @@
+import prisma from '@/lib/prisma';
+import { User } from '@prisma/client';
+import { NextRequest, NextResponse } from 'next/server';
+
+type PostRequest = {
+  username: string;
+};
+
+type PostResponse = {
+  user: User;
+};
+
+export const POST = async (
+  req: NextRequest
+): Promise<NextResponse<PostResponse>> => {
+  const { username }: PostRequest = await req.json();
+
+  const user = await prisma.user.create({
+    data: {
+      username,
+    },
+  });
+
+  return NextResponse.json({ user });
+};
diff --git a/backend/prisma/migrations/20250116232308_add_username_to_user/migration.sql b/backend/prisma/migrations/20250116232308_add_username_to_user/migration.sql
new file mode 100644
index 0000000..2d730b3
--- /dev/null
+++ b/backend/prisma/migrations/20250116232308_add_username_to_user/migration.sql
@@ -0,0 +1,8 @@
+/*
+  Warnings:
+
+  - Added the required column `username` to the `User` table without a default value. This is not possible if the table is not empty.
+
+*/
+-- AlterTable
+ALTER TABLE "User" ADD COLUMN     "username" TEXT NOT NULL;
diff --git a/backend/prisma/schema.prisma b/backend/prisma/schema.prisma
index 4da3be3..732603c 100644
--- a/backend/prisma/schema.prisma
+++ b/backend/prisma/schema.prisma
@@ -3,6 +3,10 @@ datasource db {
   url = env("DATABASE_URL")
 }
 
+generator client {
+  provider = "prisma-client-js"
+}
+
 model Genre {
   id Int @id @default(autoincrement())
   value String @unique
@@ -11,6 +15,7 @@ model Genre {
 
 model User {
   id Int @id @default(autoincrement())
+  username String
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
   preferences Genre[]