Architected migration of source code from JavaScript to TypeScript, improving type safety and reducing runtime issues, while moving React Admin to Vite for faster load times and deployments. Built event-driven microservices for real-time control of 1000+ energy storage systems. Implemented grid-support algorithms for charge/discharge during peak events, generating demand-response revenue. Designed unified OAuth2 onboarding. Worked with UK grid partners and protocols including MQTT, FTP, SOAP, REST and WebSockets. Improved serverless CI/CD using AWS SAM, reducing setup time to seconds.