▪ Maintained legacy APIs and provided upgrades to some of its services where applicable.▪ Worked with the back-end team to build an educational technology application: ▫ Integrated Paystack payment gateway to enable users to pay for subscriptions and courses, ▫ Created APIs for frontend and mobile development, ▫ Integrated AWS-SES for email notifications to users, ▫ Integrated Multer with AWS-S3 to enable admin upload and store questions, answers, explanations, and adverts from sponsors, ▫ Worked with admin to provide explanations to quiz questions,▪ Worked with the back-end team to build a third-party online shopping application thatenables inventory management, order processing, and payment: ▫ Created APIs for frontend and mobile development, ▫ Integrated AWS-SES for third-party email notifications to customers and vendors, ▫ Integrated express-fileupload to enable vendors to upload product images for third- party product.

▪ Developed a database system for a healthcare application.▪ Created APIs for web and mobile development and deployed them to production.▪ Integrated authentication and authorization for security for the API.▪ Designed workflows and Entity Relationship Diagrams to visualize and plan out thesoftware system and database.

• Created APIs for frontend development.• Created and maintained a backend API that served as a webhook to a third-party site (TypeForm / Google Form) which managed event data from respondents.