Math Problem Generator for Middle School

I'm looking for a skilled freelancer to create a set of arithmetic math problems for middle school students with answer key with some sepcfic criteria to the problem type.. The problems will cover k-8 learning: - Addition and Subtraction - Multiplication and Division - Mixed Operations - Fractions - Measurement - Area - Patterns Fractions, Measurement, Area & Patterns Proportional Relationships Rational Number Operations Expressions & Equations Geometry, Measurement & Data Ratios and proportional relationships; arithmetic of rational numbers Linear equations and linear functions The ideal candidate should have experience in educational content creation, particularly in mathematics.