Partial MongoDB Data Recovery

My MongoDB deployment has suffered a partial corruption that the standard repair utilities could not resolve, and I need an expert to salvage as much data as possible while restoring the database to a healthy, operational state. The damage affects only part of the data files—some collections load, others throw errors or return garbled documents—so I’m hopeful most records are still recoverable.

So far I have run MongoDB’s built-in repair procedures without success; beyond that, no other remediation has been attempted. I will provide full access to the data files, logs, and server environment (currently on the latest 4.x community build).

What I expect from you:
• Extract and reconstruct the corrupted data files or collections.
• Deliver a clean, working BSON or JSON dump I can reload.
• Provide a concise rundown of the steps you took, tools or scripts used, and any records that proved irretrievable so I have a clear audit trail and future prevention guidance.

If additional tooling such as mongod --repair variations, wiredTiger utilities, file-system forensics, or custom recovery scripts is required, please outline your approach in your bid so I can gauge downtime and risks. I’m ready to move quickly once I know the recovery plan.