The integrity and transparency of voting systems are fundamental to democratic societies. However, traditional voting methods and even many electronic voting systems suffer from vulnerabilities such as tampering, lack of transparency, and limited auditability. Blockchain technology, with its decentralized, immutable, and transparent ledger, offers a promising foundation for secure, verifiable, and auditable voting systems. This paper presents the design and implementation of a secure blockchain-based voting system, detailing its architecture, security features, smart contract logic, and practical deployment considerations. We discuss challenges, evaluate the system's effectiveness, and provide recommendations for future improvements.