Lotty — High-Throughput Lottery & Betting Management Platform
High-security transaction processing and game management system executing thousands of automated lottery draws with cryptographic auditing.
Stress-tested concurrent ticket generation without dropped transactions
Automated cryptographic audit logs balance every prize payout to the penny
Redundant scheduled cron orchestrators ensure draws fire on exact second marks
Project Architecture & Objectives
Key Capabilities Delivered
Engineered high-throughput REST APIs handling simultaneous ticket purchases and bet validation
Designed fault-tolerant cron orchestration for automated countdown timers, draw closures, and prize calculations
Built tamper-evident audit logging system tracking all administrative actions and balance updates
Designed print-sheet generation engine for retail counter terminals and POS receipt printers
Engineering Challenges & Solutions
Critical architectural hurdles solved to deliver performance, security, and scale.
Race Conditions on Ticket Inventory Close
Submitting bets at the exact fraction of a second before a draw closes could lead to unauthorized post-cutoff tickets.
Implemented Redis atomic distributed locks (`SETNX`) with microsecond timestamp checks before accepting tickets into database.
Visual Systems & User Experience
Technologies & Infrastructure
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