Oleksandr – Ruby, JavaScript, React

The application is one of the biggest platforms for artists, mainly digital. It provides wide range of services for artists including social media, portfolio builder and showcase (aka own website), marketplace, challenges section, learning platform, jobs searching and recruitment platform and much more.

• performed back-end architecture design and implementation;
• knowledge sharing and mentoring;
• implemented custom jobs filtering/search system by job office location (upside-down filtering from continent region to city level);
• implemented progress and statistics tracking system for learning courses in the application (different metrics on course, playback position);
• took part in all decisions making from the idea to final implementation;
• integrated with application tracking systems (Greenhouse, Lever).

System for companies working with freelancers. It provides tools for managing work with freelancers including onboarding (filling in custom forms, providing legal documents, contracts signing), project/tasks management, invoicing, communication, and payments.

• created front-end and back-end architecture;
• created custom WYSIWYG elements and behaviour;
• implemented dynamic customisable user compliance flow architecture;

Project aimed to help different non-profit organizations to gather donations in a funny way. Users were betting some money for chosen celebrities' dummy or rude tweets. Won bets were transferred to non-profit organizations, aka turning bad in good. System was tracking tweet feed and searching for keywords matches users selected and then charged users with a selected amount of money.

• created front-end and back-end architecture;
• integrated with Twitter feeds API to fetch realtime tweets and process them;
• implemented full text search on keywords in tweets;
• integrated with Stripe for payments;

Platform allows businesses to build their own loyalty programs. It is an API for mobile applications for end-users (business customers) and API for admin panel for businesses' loyalty programs management, building analytics.

• implemented new and supported existing features;
• implemented feature for automatic generator of ID card images ready for printing

Metasearch of properties for short term rent. One place for searching and booking hotel rooms or apartments anywhere on the globe via the most popular rental vendors (Booking.com, Airbnb, HomeAway and other 70+ vendors).

• implemented back-end features;
• integrated with numbers of different vendors (Booking.com, Airbnb, HomeAway and others);
• learned Erlang bases and implemented realtime rental posting price and availability refinement using separate service;