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Production-Ready Backend

Finance API:
Backend Tracker

A robust Node.js + Express backend for expense tracking and financial analytics. Features JWT authentication, complex MongoDB aggregations, and strict TypeScript type safety.

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CORE CAPABILITIES

Advanced Auth

JWT-based auth with access/refresh token rotation and secure logout.

Expense Management

CRUD operations with soft deletes, duplicate detection, and recurring expenses.

Analytics Engine

Rolling averages, category distribution, and month-over-month comparisons.

Search & Filter

Advanced filtering by date, category, amount, and payment method with pagination.

Data Export

Export financial data to JSON or CSV formats for external analysis.

Production Ready

structured logging, error handling, and environment configuration.

Comprehensive API Surface

Over 35 endpoints designed for flexibility and performance. Includes advanced features specifically tailored for financial data needs.

POST/api/auth/register
POST/api/auth/login
POST/api/expense
GET/api/expense/search
GET/api/analytics/summary/monthly
GET/api/export/csv
API Documentation

TECHNICAL ARCHITECTURE

core

  • Node.js

    Runtime Environment

  • Express.js

    Web Framework

  • TypeScript

    Strict Mode & Type Safety

database

  • MongoDB

    Document Database

  • Mongoose

    ODM with Schema Validation

  • Aggregation

    Complex Data Analysis

security

  • JWT

    Access & Refresh Tokens

  • Bcrypt

    Password Hashing

  • Zod

    Runtime Validation

  • Helmet

    Security Headers

tools

  • Swagger UI

    API Documentation

  • Morgan

    HTTP Request Logging

  • CORS

    Cross-Origin Resource Sharing