Olamide Tosin

Designed a feature-first mobile architecture using Riverpod and Dio, including background computation for heavy JSON payloads. Implemented an offline-first caching approach with stale-while-revalidate behavior to render immediately from local data while refreshing in the background. Added secure OAuth sign-in flows and implemented required compliance features for account deletion. Set up automated testing to support authentication and pagination flows.

Architected and scaled a distributed set of backend microservices for a US e-commerce and marketplace platform using NestJS. Built multi-vendor checkout and quotation flows, including cart splitting, item-level pricing, and order lifecycle transitions. Migrated email and notification delivery to BullMQ with Redis, integrating Gmail OAuth2 and Twilio SMS with rate limiting. Standardized error handling and API documentation using Swagger across services.

Planned lessons and facilitated practical laboratory activities for students in an academic year cycle. Managed the school website and supported its digital presence. Organized and delivered online learning activities such as assessments, examinations, and newsletters, and ran a coding club to develop students’ practical technical skills.

Built custom websites and web applications using WordPress themes and plugins, covering business needs such as e-commerce, CRM, ERP, and self-service solutions. Produced client-focused implementations with ongoing technical problem-solving during delivery. Collaborated with teams to support planning and the rollout of web features for business customers.