Genetically engineered enzymes having amylase enzyme activity, compositions comprising the enzymes, and methods of making and using the enzymes. Fragments of parent amylase enzymes activity and methods of using the fragments for making genetically engineered enzymes having amylase activity. The genetically engineered amylase enzymes are useful in many different applications such as laundry detergents, dish washing detergents, and cleaning products for homes, industry, vehicle care, baking, animal feed, pulp and paper processing, starch processing, brewing, and ethanol production.