Full-Stack Developer: DFS Lineup Optimizer Tool for Fantasy Football Website

We run a fantasy football content site and want to add a daily fantasy sports (DFS) lineup optimizer tool — similar in function to dailyfantasyoptimizer.com — that lets users upload player pools/projections and generate optimal DraftKings (and ideally FanDuel) lineups. Core features needed: - Linear programming / optimization engine to generate optimal lineups under salary cap constraints (standard knapsack-style DFS optimization) - CSV upload for player salaries + projections (matching DraftKings/FanDuel export format) - Support for player exposure limits (max % of lineups a player appears in) - Stacking rules (e.g., QB + WR from same team, game stacks) - Bulk lineup generation (50-150 unique lineups per run) - Export lineups in DraftKings-compatible CSV format for direct upload - Clean, simple single-page UI — no manual required to use it - Start with NFL support (single sport is fine for v1; architecture should allow adding NBA/MLB later) Nice to have (not required for v1): - Editable/custom projections per player - Basic backtesting against historical slates - Player pool filtering (by position, salary, team) What we need from you: - Experience building optimization tools (linear/integer programming — PuLP, OR-Tools, or similar) - Familiarity with DFS site formats (DraftKings/FanDuel) is a strong plus - Ability to deliver a working, deployable web app (front end + backend), not just a script - Clear communication and milestone-based delivery Please include in your proposal: relevant past projects (optimization tools, sports betting/DFS tools, or similar), your suggested tech stack, and a rough timeline/cost estimate for a v1 NFL-only version.