In a democracy, the ruler of a nation is determined by the elections. The general public use elections to express their views through a vote. For this reason, elections are very important. A faulty voting system causes most of the problems in democratic countries like Bangladesh. The existing voting systems in Bangladesh face many problems such as vote rigging, election manipulation, and polling booth capturing, and hacking of electronic voting machines. To eliminate these problems, this paper proposes a decentralized electronic voting application based on blockchain. When the voting system first began there was a concept of secret voting. In the recent past, there have been several examples where it was noted that the voting process was not completely hygienic and faced several issues including transparency and fairness, and the will of the people was not observed to be effectively quantified and translated in terms of formation of the governments. The data and the application code of a decentralized architecture are immutable. The data or the code can not be unilaterally changed by any of the blockchain nodes. Here the blocks are used to arrange the votes and a hash function is used to chain the blocks together to form a public record. Then smart contracts are used for the application function codes. In this way, the code and the data are more secure and are tamper-proof. We therefore believe that a blockchain technology-based voting system will be more suitable for the deployment of e-voting applications in Bangladesh.