•Developed Customer Success Department structure, strategies, and policies.•Established the Customer Success function at a fast-growing start-up, designing scalable processes and frameworks that supported a 50% increase in customer base.•Formulated and currently execute streamlined onboarding processes and personalized customer journey maps, reducing onboarding time by 20% and improving customer satisfaction scores by 35%.•Researched, evaluated, and implemented various Customer Succes CRM platforms•Utilize advanced analytics and data-driven insights to guide customer success strategies, leading to a 25% improvement in customer engagement and retention through targeted actions and continuous improvement initiatives.•Foster an agile and innovative customer success environment that quickly adapts to market changes and customer feedback, resulting in a 30% enhancement in customer experience and alignment with evolving business needs.