SHA256 Decryption Specialist for Data Retrieval

I'm in need of an expert in cryptography, specifically proficient in SHA256, to assist with a custom implementation of a decryption algorithm for data retrieval. The primary responsibilities for this role will include:

- Decrypting the SHA256 algorithm with a specific iv and key.
- Developing a capability for retrieving transactional data post decryption.
- Ensuring the preservation of data integrity during the entire process.

Ideal candidates should have experience in data decryption, knowledge of SHA256, and a proven history of successful implementation. The ability to handle confidential transactional data safely and comply with all data security standards is also necessary. This project demands attention to detail, precision, and robust understanding of cryptographic algorithms.