Core responsibilities include: • Lead the end-to-end development of a payment application for iOS devices, from concept and design to testing, deployment, and maintenance. • Collaborate with product managers/owners and designers to gather requirements and translate them into functional, intuitive, and secure payment features. • Design and implement secure payment processing mechanisms, adhering to industry standards and best practices. • Integrate the payment application with third-party SDK, payment gateways, APIs, and backend systems. • Ensure the application meets compliance and security standards, such as PCI-DSS, and implement necessary encryption and data protection measures. • Write clean, efficient, and maintainable code, following established development processes and guidelines. • Conduct thorough testing to identify and resolve bugs, performance issues, and security vulnerabilities.