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Teamflow

TeamFlow is a multi-tenant SaaS platform that allows organizations to manage teams, projects, tasks, and subscriptions.

Next.jsNodeJsMongoDBRedisTypeScriptNestJSREST APIsPostgreSQLTailwind CSSRazorpay
Teamflow

TeamFlow – Multi-Tenant SaaS Platform (Backend-Focused Project)

Goal:
Build a production-grade, resume-worthy SaaS application to master backend web development concepts while keeping frontend minimal and practical.

1. Project Overview

TeamFlow is a multi-tenant SaaS platform that allows organizations to manage teams, projects, tasks, and subscriptions.

This project is designed to:

  • Strengthen backend fundamentals
  • Practice real-world system design
  • Reduce over-reliance on AI
  • Serve as a flagship resume project (2026-ready)

2. Tech Stack (Recommended)

Backend

  • Node.js
  • TypeScript
  • NestJS
  • REST APIs (Swagger documented)

Database & Caching

  • PostgreSQL
  • Redis

Frontend (Minimal)

  • React + TypeScript
  • Tailwind CSS

DevOps & Infrastructure

  • Docker
  • GitHub Actions (CI/CD)
  • AWS / DigitalOcean / Render / Vercel
  • Razorpay (Payments)

3. Core Backend Concepts Covered

  • Authentication & Authorization (JWT, Refresh Tokens)
  • Role-Based Access Control (RBAC)
  • Multi-Tenancy Architecture
  • Database Design & Indexing
  • REST API Design
  • Background Jobs & Queues
  • Caching Strategies
  • Rate Limiting
  • File Uploads
  • Logging & Monitoring
  • Payments & Webhooks
  • Security Best Practices
  • Docker & Deployment

4. System Architecture (High Level)

Client (React) | API Gateway (NestJS) | Auth Module ── Users ── Organizations | Projects ─ Tasks ─ Comments ─ Files | Redis (Cache & Queues) | PostgreSQL

5. Core Features

5.1 Authentication & Authorization

  • Email & password authentication
  • JWT + Refresh tokens
  • Password hashing (bcrypt)
  • Role-based access:
    • Admin
    • Manager
    • Member

5.2 Multi-Tenancy (Critical Feature)

  • Each user belongs to an Organization
  • All data scoped by organization_id
  • Enforced at:
    • Database level
    • API level
  • Prevent cross-organization data access

5.3 Organizations & Teams

  • Create organization
  • Invite users
  • Assign roles
  • Manage members

5.4 Projects & Tasks

  • Projects per organization
  • Tasks with:
    • Status (Todo, In Progress, Done)
    • Priority
    • Due date
  • Task assignments
  • Comments & mentions

5.5 Activity Logs

  • Track user actions:
    • Task created
    • Task updated
    • Member invited
  • Store efficiently
  • Pagination & filtering

5.6 File Uploads

  • Upload task attachments
  • Store files in:
    • AWS S3 / Cloud Storage
  • Secure access via signed URLs

5.7 Background Jobs

  • Redis-based queues
  • Jobs:
    • Email notifications
    • Daily activity summary
  • Retry & failure handling

5.8 Subscription & Billing

  • Stripe integration
  • Plans:
    • Free
    • Pro
  • Features gated by plan
  • Webhook handling:
    • Subscription created
    • Payment failed
    • Subscription canceled

5.9 Performance & Security

  • Redis caching for hot endpoints
  • API rate limiting
  • Input validation
  • SQL injection protection
  • Centralized error handling
  • Structured logging

6. Database Design (Key Tables)

  • users
  • organizations
  • organization_members
  • projects
  • tasks
  • task_comments
  • activity_logs
  • subscriptions
  • payments

7. Development Phases

Phase 1 – Core Backend (4–6 Weeks)

  • Project setup (NestJS)
  • Database schema & migrations
  • Authentication & RBAC
  • CRUD APIs
  • Postman collection

Outcome: Fully functional backend API

Phase 2 – Advanced Backend (3–4 Weeks)

  • Multi-tenancy enforcement
  • Redis caching
  • Background jobs
  • Activity logging
  • Stripe payments

Outcome: Production-grade backend

Phase 3 – Frontend (2–3 Weeks)

  • Authentication UI
  • Dashboard
  • Project & task management
  • API integration

Outcome: Usable admin dashboard

Phase 4 – Deployment & Polish (1–2 Weeks)

  • Dockerize services
  • CI/CD setup
  • Environment configs
  • Swagger API docs
  • README documentation

Outcome: Deployed SaaS application

8. Resume Description (Example)

TeamFlow – Multi-Tenant SaaS Platform

  • Designed and developed a scalable backend using NestJS and PostgreSQL
  • Implemented JWT authentication, RBAC, and multi-tenant data isolation
  • Integrated Redis for caching and background job processing
  • Built Stripe-based subscription system with webhook handling
  • Containerized services using Docker and deployed on cloud infrastructure

9. Rules to Follow (Very Important)

  • ❌ Do NOT copy-paste AI-generated architecture blindly
  • ✅ Design database schemas yourself
  • ✅ Write business logic manually
  • ✅ Use AI only for:
    • Syntax help
    • Code optimization
    • Debugging guidance

10. Optional Advanced Enhancements

  • API versioning (v1, v2)
  • Feature flags
  • OpenTelemetry
  • System design documentation (PDF)
  • Unit & integration tests

11. Final Note

Build ONE project deeply, not many projects superficially.

This project alone is enough to:

  • Regain backend confidence
  • Crack backend interviews
  • Compete with 2–3 year experienced developers

Next Steps (Optional):

  • Week-by-week learning roadmap
  • Database schema design
  • API design checklist
  • Backend interview questions based on this project