Persistent electoral irregularities—ranging from vote manipulation and ballot stuffing to logistical failures and post-election violence— continue to undermine democratic consolidation across developing democracies. Nigeria, Africa’s largest democracy, epitomizes this crisis, where recurrent allegations of fraud, digital failures, and institutional mistrust have eroded public confidence in electoral outcomes. This paper proposes a secure, transparent, and technically robust blockchain-based electoral framework tailored for developing democracies. Leveraging the core attributes of blockchain— immutability, decentralization, real-time auditability, and cryptographic security—we design a technical architecture for voter registration, ballot casting, vote tallying, and public verification. The system integrates smart contracts, Proof of Authority (PoA) consensus, cryptographic identity verification, and zero-knowledge proofs to ensure integrity, privacy, and resilience. We analyze implementation challenges including the digital divide, cybersecurity threats, and legal gaps, and propose a phased, stakeholderdriven roadmap anchored in Nigeria’s institutional context. Comparative insights from Estonia, Sierra Leone, and Brazil underscore the importance of local ownership, institutional autonomy, and civic literacy. The paper contributes a practical, context-sensitive blueprint for blockchain-based electoral reform, bridging the gap between theoretical innovation and real-world deployment in fragile democratic ecosystems.