Illia Zub

Helped SmileBack to integrate webpack to the development process and the build pipeline. Paired with CTO. Currently working on browser automation for dropshippers.

* Bring gray-box testing to the frontend: Jest for unit tests with jest-puppeteer for a kind of integration tests. Added execution of frontend tests to the release pipeline. Helping developers to write tests. * Saved 1.09 TB on production servers. * Implemented a cluster of build processes to create sprite images and compile *.less files in parallel. Due to this, the release time approximately decreased from 2 hours to 1 hour, so we can ship features and bug fixes faster. * Approximately decreased memory usage of sprite and *.less files build processes from 1.5G to 600M. Used node-heapdump, valgrind and llnode to perform profiling and analysis. * Migrated front-end code to Webpack and made a presentation about that transition at the local meetup. * Reduced amount of bugs in the custom build system. * Optimized build system performance by decreasing I/O calls from 14M to 1,3M. * Implemented I/O-optimized solution to build sprite images and almost I/O-optimized solution to compile Less files. * Done three huge refactorings of the build system. * Improved Yii's AssetManager by forbidding assets "publishing" during the web requests. * Integrated Google Tag Manager to the top websites of our company. Of course, with custom tags, variables, triggers and dimensions. * Performed code reviews. * Was a mentor of release engineer. * Participated in Jenkins integration.