Karol Wypchlo Email & Phone Number

Warsaw, Pl

IP licensing platform with blockchain settlement layer // Typescript, Next.js, tRPC, Docker, PostgreSQL, Ethers.js- improved web3 authentication on Next.js app with Multi-party Computation and Auth0 SSO for walletless onboarding- reduced processing time of import API by 80% increasing endpoint’s ingress capacity from 500 to over 5000 rows- refactored PostgreSQL schema and aggregated blockchain data improving responses previously timing out on 5m cap to sub 10s

San Francisco, California, Us

Saturn - decentralised web3 CDN for IPFS and Filecoin // Typescript, Node.js, Docker, PostgreSQL, Lua, Nginx, AWS- authored Node.js streamer module processing large files with low memory footprint, failure recovery and resumable batching- developed observability api and network monitoring dashboard with data from over 3000 public Nginx servers

Boston, Massachusetts, Us

Skynet - decentralised cloud storage on Sia blockchain network // Typescript, Node.js, Docker, Lua, Nginx, Bash, Python, AWS- designed, built and maintained distributed servers infrastructure from ground up to 50+ dedicated servers- developed high throughput Nginx API serving 50Gbps+ of load balanced traffic from Sia network- authored "Deploy to Skynet" GitHub Action (Node.js) - continuous deployment to Skynet network with pull request previews- developed standalone SiaStream application (compiled Node.js) integrating Fuse with Sia storage optimised for Plex.tv

Us

Data analysis and visualisation platform for surveys with data grids and statistics SDK // Javascript, React.js, Node.js, Python- curated Node.js and browser statistics SDK with extensive code coverage and integration tests stack- learned python basics and helped out with high priority migration of backend export service to a new architecture- after hours project: implemented generic API for bridging gaps between SDK implementations in other languages, saving hundreds of hours of planned maintenance and development and delivering missing features to key clients before schedule

London, Gb

JavaScript developer and later team and tech lead on back office, form heavy application based on AngularJS. Application was built with component based architecture using latest available technologies like AngularJS, ES6, SystemJS, Gettext or Angular Material.• collaborated with a dedicated frontend team on architecting and building an AngularJS application• introduced model driven forms that allowed rapid development and resulted in on time product delivery• collaborated with designers on user friendly and modern look of the application with strong emphasis on user experience (hundreds of forms) and mobile friendly design• promoted to team lead and tech lead• since June 2016, front end tech lead for several projects in IGT responsible for front-end architecture, synergy between teams, code and tools standardization and communication with management.

Switzerland 🇨🇭 , Ch

Developed and maintained internal Backbone application for building websites with drag and drop elements.

Pl

Worked with a full stack in agile teams on several projects that include:• 2014: designed and developed patients registration application with Symfony and AngularJS• 2013-2014: designed and developed Hospital Information System enhanced with jQuery and AngularJS • 2010-2013: developed in-house CRM system based on SugarCRM CE (PHP, jQuery)