🌍 https://pavelloz.comI'm heavily performance and business oriented frontend developer. I'm old enough to remember myself using PNG transparency hacks for IE6 and passionate enough to learn new tricks in the frontend department. Senior Performance Engineer — remote @ platformOS Jul 2016 — present
Frontend Owned technical stack of award winning documentation Owned technical stack of marketing website Node.js (serverless) Image processing service: AWS S3 + AWS Lambda + Sharp HTML to PDF: AWS S3 + AWS Lambda + Puppeteer Unzip service with no file size limits. Based on streams : AWS S3 + AWS Lambda Technologies and frameworks used Frontend frameworks: React.js, Svelte.js, Alpine.js CSS Technologies: SASS/Scss/Stylus, TailwindCSS Testing using: TestCafe, CodeceptJS, Cypress, Jest, AVA, Testing Library Static site generators: Eleventy, Gatsby, Next.js, Docusaurus CI/CD: Github Actions, Jenkins AWS services: Lambda, S3, CloudFront, CloudWatch, SNS, Billing explorer Others: GraphQL, Grafana, Docker, Cloudflare Content creation Supported devs by writing articles, examples, docs, answering questions Written technical articles to promote best practices in frontend, testing and web performance Senior Frontend Developer — remote @ OVP (Capguru.io ) Sep 2015 — Jul 2016
Implemented capitalization tables calculation in vanilla js Developed various visualizations using HighCharts.js Prepared optimal asset pipeline in Webpack v1 Senior Frontend Developer @ EL Passion Jan 2014 — Aug 2015
Built custom interactive visualizations using D3.js and HighCharts.js Upgraded legacy app frontend to modern standards in 3 months while doing assigned tasks Optimized page load times of the application from 3.4s to 1.9 in 3 months Written kiosk app allowing customers to apply for credit cards and loans (AngularJS) Written ticket management system for work prioritization (Backbone.js) Written first online credit card application form in Poland (vanilla js) Took ownership of transactional service frontend Optimized existing projects performance and frontend architecture Interviewed and supported frontend developers with practical knowledge, gave feedback on performance, recommended for promotions Decreased page load time main website from 14s to 4.5s using only frontend optimizations Open Source 2011 — present
webpack-tailwindcss (creator) - performant Webpack and TailwindCSS boilerplatepos-cli (maintainer) - CLI tool to manage applications hosted on platformOSposify (creator) - web scraper for Site Catalyst (Adobe) websites and converter into platformOS format
Interests Economy, photography, travel E-Bikes, electric mobility Environment conservation