Michał Markiewicz
Trader Investor at Samozatrudnienie
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolMichał Markiewicz is a Warsaw-based technologist turned full-time trader and investor with 11 years of software development experience and a Master's in information systems. He transitioned from senior and technical lead roles at Spark Solutions and Arena.pl into independent trading in 2018, applying programmer-grade problem solving to long-term investing and cash-flow strategies. As a full-stack contributor to the open-source Spree e-commerce platform, he has hands-on experience fixing build systems, refactoring core components, and resolving complex merge conflicts in collaborative projects. His background blends practical engineering discipline with quantitative trading instincts, enabling systematic, code-driven approaches to portfolio management. Notably, he leverages experience from multi-tier web platforms to design resilient, automatable trading workflows rather than relying solely on intuition.
11 years of coding experience
4 years of employment as a software developer
Master's degree, Systemy informatyczne, 5, Master's degree, Systemy informatyczne, 5 at Uniwersytet Łódzki
Stackoverflow
196reputation
3kreached
8answers
2questions
Github Skills (17)
ruby-rails10
ecommerce10
rspec10
rails10
ruby10
spree10
ruby-on-rails10
spreed10
git9
frontend8
backend8
paperclip6
activeadmin6
devise6
facebook6
Programming languages (2)
Github contributions (5)
spree/spree
Jan 2016 - Dec 2016
An open source eCommerce platform giving you full control and customizability. Modular and API-first. Multi-vendor, multi-tenant, multi-store, multi-currency, multi-language. Built using Ruby on Rails. Developed by @vendo-dev
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:137 commits, 127 PRs, 90 pushes in 10 months
Contributions summary:Michał made several contributions to the Spree e-commerce platform, primarily focused on improving the frontend and backend functionality. They fixed build-related issues by modifying the `build.sh` script. They also added specifications and made refactorings to several parts of the system. Further contributions included merging branches and resolving conflicts, indicating involvement in collaborative development efforts.
multi-sourceecommercemulti-languagespreecommerceshopware
spree-contrib/spree_braintree_vzero
Sep 2015 - May 2017
Official Braintree + PayPal integration gem for Spree Commerce
Contributions:358 commits, 79 PRs, 47 pushes in 1 year 7 months
paymentsecommercecommercespree-commerceadyen
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