We investigate the impact of two dimensions of job flexibility on the gender wage gap (GWG): one related to the characteristics of the occupation itself and another specific to the firm. Using a large administrative dataset for Brazil, we find that: (i) both the occupation and the firm dimensions of job inflexibility pay wage premiums; (ii) these wage premiums are larger for men compared to women; and (iii) the two dimensions of job inflexibility feed each other back, magnifying their widening impact on the GWG in favor of men.