Marek Publicewicz

I know the language inside-out and I usually know how to patch existing libraries. Skilled at things like namespacing (and organizing code in general), prototypical inheritance, promises, closures, advanced DOM manipulation, AJAX, timeouts & intervals

Worked on a large enterprise SaaS codebase, which consisted of over 500 React.js components. I've used Backbone.js models , Flux, Redux and React Hooks to manage state of the app. I can help you with: - understanding the "React Way" of organizing your app into components, - designing component hierarchy that will represent your problem domain, - split components into container and presentation components to maximize performance, - debug state-related errors, - write tests at both unit and integration levels using frameworks like jest and jasmine

Worked with Rails since version 2.x on projects ranging from end-to-end app development, through working with legacy code, performing code reviews, to upgrading old Rails apps and gems to the newest versions

Worked as a senior backend engineer for Alation, helping to scale their initial SaaS product to the current version (serving more than 100 big enterprise customers). Also worked on smaller projects using both Flask and Django.

I've used D3 to build simple visualizations, implemented a custom library to render interactive charts using D3's primitives and used C3.js to add charting capabilities to SaaS apps.

I've used C++ to write low-latency system services, using both "classic" C++ as well as modern constructs available in C++11, C++14, C++17 and C++20. I know how to optimize code taking advantage of constexpr and compile-time evaluation, how to use template metaprogramming to reduce amount of code and how to structure classes & methods for maximum composability. I also have experience with configuring C/C++ toolchains and continuous integration systems, using both Bazel and Cmake

Coming from React.js background, I learned and mastered Vue.js while working on 2 web applications: 1) a tool to calculate and visualize SaaS metrics (customer churn, revenue churn, cross-sell, upsell) etc and 2) a personal nutrition and fitness planner and tracker