Investment Performance Web API – Take-Home Submission

.gitignore

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+# Node.js
+node_modules/
+
+# Build output
+/dist

SOLUTION.md

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+# Solution Overview
+
+This document describes the design, implementation, and assumptions for the Investment Performance Web API solution s
+
+---
+
+## Technology Stack
+
+- Node.js (ESM)
+- TypeScript
+- Express
+- Jest (unit testing)
+- tsx (local development)
+
+> This solution is implemented in TypeScript/Node.js to showcase familiarity with modern API design, asynchronous workflows, and testable service-oriented architecture. The overall structure maps cleanly to patterns commonly used in ASP.NET Core (controllers, services, repositories, middleware).
+
+---
+
+## Running the Application
+
+### Prerequisites
+- Node.js 25
+
+### Install dependencies
+```
+npm install
+```
+
+### Run tests
+```
+npm test
+```
+
+### Run locally
+```
+npm run dev
+```
+
+The API will be available at 
+```
+http://localhost:3000
+```
+
+## API Endpoints
+### Get a list of current investments for the user
+```
+GET /api/users/:userId/investments
+```
+> Sample UserId: 
+>>
+```
+user1
+user2
+```
+### Get details for a user's investment:
+```
+GET /api/users/:userId/investments/:investmentId
+```
+> Sample details:
+```
+userId: user1
+investmentId: EQ-001
+```
+## Assumptions & Scope Decisions
+
+* Data is stored in memory for simplicity
+* Current prices are provided by a mocked pricing provider
+* Authentication and authorization are out of scope
+* No persistent database is included
+* User context is provided via route parameters

jest.config.cjs

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+module.exports = {
+  preset: "ts-jest",
+  testEnvironment: "node",
+  testMatch: ["**/*.test.ts"],
+  clearMocks: true
+};