Primary factors influencing IT project outcomes are personnel and their professional development. Personnel assessment is a key tool for determining employee potential and possible career paths. In most cases the assessment is based on the subjective opinions of managers, which do not possess a high degree of reliability and completeness. The solution to this problem is seen in using the results of digital footprint analysis. In this study, a model for assessing software developer competence based on fuzzy logic was constructed, utilizing the outcomes of an employee’s digital footprint data mining analysis for calculations. The model was developed using a proposed competency matrix, which incorporates significant factors identified from the structural model as competencies and additional factors derived through text mining.