In the prevalent project management systems, the employee’s performance evaluation is a crucial component for preserving efficiency and growth. However, these systems often fail to provide precise, candid, and tamper-proof evaluations, which leads to wrongful analysis and irregularities. This paper proposes a blockchain-based tamper-proof evaluation system for project management, combined with protected storage using IPFS which will improve the credibility and safety of performance data. The system uses three key components through a private blockchain network for consistent data-recording, self-operating code evaluation tools including MOSS and Diffchecker for unbiased analysis, and IPFS-based decentralized storage for the data to be evaluated. This system focuses on improving data safety and is planned to reduce biased evaluation by 70–80% compared to traditional methods. It also includes a mechanism for managerial supervision which allows the managers to alter assessments in case the evaluation tool’s assessment has any error. Unlike the current systems, each and every modification is cryptographically signed, guaranteeing trackability while preventing unfairness. The blockchain layer is designed using a permissioned consensus mechanism, where only authenticated nodes participate in transaction validation and block propagation, ensuring robust access control and data integrity. Also, we use IPFS to access previous performance data while ensuring safety and independence from centered servers. To preserve authenticity, all the changes made by the manager are documented and forwarded to higher authorities for review. This regulated flexibility balances computerization with human judgement, ensuring fairness in performance assessment enhancing the impartiality of employee assessments. Moreover, the employees will get to be in a stress-free healthier environment and a more balanced workplace.