An aPriori developer works with aPriori software, a cost estimation and product management tool. They manage product cost data, create cost models, and integrate aPriori with other enterprise systems. They also troubleshoot and resolve issues related to aPriori applications. Their goal is to help companies predict and control manufacturing costs throughout the product development process. They collaborate with various teams, including engineering, manufacturing, and finance, to ensure accurate cost estimations. Their role requires knowledge in product manufacturing processes, costing methodologies, and proficiency in programming languages like SQL or Python to customize the aPriori platform according to business needs.