The transition from software engineer to technical lead (TL) represents a pivotal career shift that demands mastery of both technical expertise and leadership capabilities. While software engineers primarily focus on coding and problem-solving, TLs must balance technical proficiency with responsibilities such as project management, team coordination, communication across stakeholders, and strategic decision-making. This paper presents a systematic review conducted in accordance with PRISMA standards, synthesizing insights from six peer-reviewed studies published between 2014 and 2024. The review identifies four central themes that underpin a successful transition: (1) leadership skills, including communication, empathy, and conflict resolution; (2) managing team dynamics and fostering collaboration; (3) balancing technical and managerial responsibilities; and (4) embracing continuous learning to adapt to evolving technologies and leadership practices. Findings highlight that effective TLs act as both technical specialists and facilitators of team performance, bridging the gap between organizational goals and engineering execution. The review underscores the importance of developing emotional intelligence, decision-making strategies, and adaptability to manage the uncertainties and complexities inherent in leadership roles. Overall, this study contributes a structured framework of competencies and strategies that can support software engineers in mastering the transition to technical leadership, offering guidance for individuals and organizations alike in preparing for this critical career progression.