Name: Reign of Vampires
Type: MMO City-Building Game (Mobile)
Tech Stack: Lua (client), PHP/Python (backend), Redis (caching)

 

 

 

 

Reign of Vampires is a strategy MMO mobile game set in a gothic, supernatural world. Players build their vampire strongholds, form guilds, and compete in large-scale asynchronous PvP events. My work focused on backend systems and optimizing large-scale, performance-heavy features to ensure smooth gameplay in a competitive environment.

 

⚔️ Core Features and Systems

• 🛡️ Guild-Based Progression Events:
  Players team up in guilds to unlock achievements, earn rewards, and climb exclusive leaderboards.

• 🛒 Dynamic, Progressive Sales System:
  Sales offerings adapt to the player’s progression. I worked on:

  • Dynamic sales rules based on player level/activity

  • Voucher creation system for in-game currency and items

• 🧠 Asynchronous Matchmaking for PvP:
  Players engage in timed battles using a system that matches opponents based on activity, level, and history — without requiring real-time synchronization.

 

 

 

 

🧩 Challenges & Engineering Solutions

🎟️ Voucher Creation and Redemption

Managing real-time sales and redemption codes required:

• A secure system for generating and validating item vouchers

• Integration with a progressive pricing model tied to player behavior

🌐 Global Leaderboards with High Traffic

Displaying real-time global rankings across thousands of players was a bottleneck. To resolve this, I:

• Implemented a Redis cache layer for high-speed access

• Optimized database queries to handle leaderboard refreshes with minimal load

 

⚔️ Asynchronous Matchmaking System

One of my favorite technical challenges:

• Created a logic system for pairing players without requiring real-time sync

• Ensured fairness using tiered brackets and recent performance history

• Minimized waiting time while balancing PvP engagement quality