Tina -

Led backend and DevOps teams of 5 engineers designing scalable microservices architecture on AWS and GCP Architected PenPay (https://penpay.com.ng) payment gateway with bulk/single payments, secure PIN validation, and real-time notifications Designed event-driven API architecture reducing response times from 5+ seconds to under 200ms through asynchronous message handling Engineered automated payment summaries, administrator notifications, and account management via webhooks and cron jobs Processed several thousand transactions with 95% success rate and improved processing time by 35% Mentored junior developers and conducted code reviews to maintain high engineering standards

- Developed secure banking APIs for digital banking operations using Node.js, TypeScript, and MongoDB - Built critical financial features, including interbank transfers, authentication, device tracking, and beneficiary management - Designed and implemented admin portal APIs for customer account management - Streamlined interbank transfer processing, improving transaction efficiency - Technologies: Node.js, TypeScript, MongoDB, Express, AWS

- Developed and maintained web applications for a major Nigerian internet service provider - Built Wificall, a VoIP application now serving thousands of users with features including authentication, call history, and conference calling - Created TizetiOS, an internal CRM system automating workflows across sales, customer support, and field operations - Led recruitment, onboarding, and mentorship initiatives for new team members - Key Achievement: Increased operational efficiency by 30% through workflow automation - Technologies: JavaScript, TypeScript, Node.js, MySQL, React