Logical Bug Fix Needed

I need an experienced developer to dive into our existing codebase and resolve a logical error that is breaking expected outcomes. The issue is not related to runtime crashes or UI glitches—everything compiles and loads fine—but the results produced by a specific routine are incorrect... (Budget: ₹600 - ₹1500 INR, Jobs: C# Programming, Debugging, Java, JavaScript, Python, Software Development, Software Engineering, Software Testing)