Nkosinathi Gift Mnguni

Built and shipped responsive frontend features for a large-scale web application, including mobile UI, reusable components, and interactive messaging interfaces. Delivered real-time in-app notifications and improved reporting UI with validation, tooltips, and error handling. Implemented robust complex text and URL rendering logic while maintaining backwards compatibility, and built UI with Svelte/SvelteKit following established patterns and accessibility standards. Developed backend services in Node.js and TypeScript, refactoring utilities into helper and engine layers to improve maintainability. Contributed to GenAI-powered tools, diagnosed and resolved a production server error traced to a database cascade configuration, cleared cross-browser regression bugs, upgraded Node.js v20 to v24 across multiple platform layers, expanded unit testing with Vitest and Jest (including OAuth2 flow mocks), and supported CI/CD quality checks using Jenkins/Bitbucket/SonarQube with trunk-based Git flo

Architected and developed full stack applications using React.js, Node.js, React Native, Next.js, and non-SQL data stores to support thousands of users. Designed scalable RESTful APIs for core business functions and used Firebase to reduce data latency. Led a migration from microservices to monolithic architecture to improve system reliability and development workflow. Managed database optimization initiatives to improve query response times and mentored junior developers in modern JavaScript practices. Managed third-party systems and integrations such as Rocketseed for email signature configuration and Yaxxa/headset configuration on platform. Built an end-to-end ticketing and donation management system for charity events, including QR-code validation and automated email receipts.

Architected and developed full stack applications using React.js, Node.js, React Native, Next.js, and non-SQL approaches to serve thousands of users. Designed and implemented scalable RESTful APIs for core business functions and used Firebase to reduce data latency. Led migration from microservices to a monolithic architecture to improve reliability and development velocity, and drove database optimization initiatives to improve query response times. Mentored junior developers in modern JavaScript practices, managed third-party systems and implementations (e.g., Rocketseed and Yaxxa platform configuration), and developed an end-to-end ticketing and donation management system for charity events with QR code validation and automated email receipts.