<p>Blockchain technology is revolutionizing industries by fundamentally transforming data management and storage practices. Traditional banking systems, however, continue to face challenges such as dependency on intermediaries, lack of transparency, vulnerability to fraud, and restricted accessibility. To overcome this limitation, we propose an innovative blockchain framework built on the Ethereum platform to enhance security and efficiency in banking. The proposed system eliminates intermediaries by using Ethereum-based smart contracts to enable secure, automated peer-to-peer (P2P) deposits, withdrawals, and transfers while incorporating a user-friendly interface with MetaMask and custom wallets for accessibility. The architecture was implemented and tested on the Sepolia Ethereum Testnet using Solidity, Ether.js, and React.js, ensuring seamless interaction between the smart contract and the user interface. Our experimental evaluation demonstrated significant improvements in transaction speed, transparency, and operational efficiency compared to traditional systems, with near real-time processing and automated verification. Performance benchmarking showed competitive latency and throughput, while gas cost analysis highlighted trade-offs in transaction expenses compared to conventional banking. These findings suggest that our blockchain framework has strong potential to address long-standing inefficiencies in the financial sector. While challenges remain, including scalability and regulatory considerations, this work offers a concrete and impactful step toward the practical adoption of blockchain in mainstream banking.</p>