Holger Bartel

web design frontend mobile development responsive web design css performance html tooling javascript grunt missed connections foundation design web performance web ux optimisation web development ethics security privacy webperf user experience hong kong china asia devices ethical design http/2 critical rendering path testing frameworks tools infrastructure smartphones statistics webdesign mobile web standards firstpaint devtools best practices http2 http1.1 time front end speed anti-patterns process code details copywriting dev tools bandwidth first paint missed in hkg missed in hkg missed in hkg missed in hkg missed in hkg missed in hkg missed in hkg missed in hkg progressive enhancement media queries sass stylesheets methodologies bestpractice 2g 3g 4g web design and development networks developing countries optimization geoperformance webshaped fronttrends warsaw front trends broadband culture users website traffic open device lab responsive rwd workflows