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
JavaScript Developer @ Citi Handlowy
May 2012 — Dec 2013
- 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
Senior Frontend Developer @ Connectmedica
Jul 2010 — Apr 2012
- 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 boilerplate
- pos-cli (maintainer) - CLI tool to manage applications hosted on platformOS
- posify (creator) - web scraper for Site Catalyst (Adobe) websites and converter into platformOS format
Interests
- Economy, photography, travel
- E-Bikes, electric mobility
- Environment conservation