This study focused on daily job crafting and explored its contextual determinants and one motivational outcome (i.e., work engagement). Job crafting was conceptualized as "seeking resources," "seeking challenges," and "reducing demands." Participants were 95 employees from several organizations who completed a 5-day diary survey. As hypothesized, we found a 3-factor structure for the job crafting instrument, both at the general and day levels. We hypothesized and found that the combination of high day-level work pressure and high day-level autonomy (active jobs) was associated with higher day-level seeking resources and lower day-level reducing demands. Furthermore, we found that day-level seeking challenges (but not resources) was positively associated with day-level work engagement, whereas day-level reducing demands was negatively associated with day-level work engagement. Findings suggest that job crafting is a daily employee behavior with implications for management practice and future research.