Fantasy Football Assistant (MERN + Sleeper API)

A web app that connects to your Sleeper fantasy football leagues to help you dominate your season with:

• Personal tier-based rankings
• Weekly lineup optimization (start/sit recommendations + boom/bust risk)
• Rest-of-Season (ROS) value charts
• League insights including opponent strength dashboards and playoff odds visualizations

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Features

Draft & Roster Management

• Build custom tiered rankings for your league
• Drag-and-drop interface to reorder players
• Import baseline rankings to seed your tiers

Weekly Lineup Optimization

• Start/Sit recommendations factoring in:
  • League scoring rules
  • Opponent matchups
  • Boom/Bust probability
• Thursday/MNF player lock awareness

Rest-of-Season (ROS) Tools

• Value charts showing each player's projected value
• Trade analyzer that compares multi-player deals
• Buy-low / sell-high indicators

League Insights

• Opponent strength heatmaps by position
• Playoff odds projections (Monte Carlo simulation)
• Remaining schedule difficulty

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Tech Stack

Frontend

• React (Vite) + TypeScript
• TailwindCSS + shadcn/ui
• React Query for server state
• Zustand or Redux Toolkit for local state

Backend

• Node.js + Express + TypeScript
• MongoDB Atlas + Mongoose
• Redis + BullMQ for background jobs
• JWT authentication

Integrations

• Sleeper API (league, roster, and player data)
• Optional: weather/injury/news APIs