Enterprise UI & CI/CD for National Grid UK
National Grid UK•Principal Engineer•1+ Year (2024-2025)
Led the development of enterprise-grade UI platform for National Grid UK, a Fortune 500 energy company serving 20 million customers.
Challenges
- ⚠️Complex regulatory and business requirements requiring careful translation to technical solutions
- ⚠️Weekly deployment cycles causing delayed feature releases and slow bug fixes
- ⚠️Inadequate test coverage leading to production defects
- ⚠️Manual deployment process prone to errors
Solutions
- ✅Built enterprise UI with Next.js (SSR) + React 18 + TypeScript with strict typings and reusable components
- ✅Designed AWS CI/CD pipelines (CodePipeline, CodeBuild, Lambda, S3, CloudFront) reducing deployment cycles from weekly to daily
- ✅Automated testing with Vitest & Playwright achieving 90%+ coverage
- ✅Implemented payload optimization and caching strategies improving API response times by 25%
- ✅Designed AI-assisted internal tooling using Python for automated data validation and log analysis
Business Impact
- 📈Reduced deployment cycles from weekly to daily (700% improvement)
- 📈Achieved 90%+ test coverage, reducing production defects
- 📈Improved API response times by 25%
- 📈Enhanced developer productivity through AI-assisted tooling
Technologies Used
Next.jsReact 18TypeScriptNode.jsExpressAWS CodePipelineLambdaS3CloudFrontVitestPlaywrightPython