The purpose of this study is to examine the influence of social media on recruitment effectiveness and post-hire employee engagement, focusing on the credibility and satisfaction associated with social media platforms. The research explores both pre-hire and post-hire outcomes to understand the full recruitment lifecycle. A quantitative research design was employed, utilizing a survey method to collect data from human resource professionals and employees across various organizations. The analysis will be conducted using statistical techniques, such as regression analysis and structural equation modelling, to assess the relationships between social media use, recruitment outcomes, and employee engagement. The findings reveal that social media enhances recruitment efficiency by improving candidate credibility and satisfaction during the pre-hire phase, leading to higher engagement in the post-hire phase. However, reliance on social media alone has limitations in assessing long-term employee retention. This study provides practical implications for HR managers to integrate social media as a key recruitment tool while acknowledging its limitations. It also contributes to the literature on employee engagement, offering a comprehensive view of recruitment outcomes. The originality of the study lies in its dual focus on both recruitment and post-hire outcomes through social media use, filling a gap in existing research.