Boyan Filipov

A social network content aggregator and visualizer platform. We continually developed and upgraded the back end and the aggregator core while, on the front end, I worked on the React portion of the management UI and upgraded legacy, non-React pages to React.

I was a full-stack developer in the Agile development team. In a Scrum team environment and a medium-sized Agile team, my integration as a freelancer put me in a good position to influence (and balance between ) the development team and management. I also assisted (in a limited manner, as we had a dedicated DevOps team working on it) when the company migrated to AWS and helped debug the setup on multiple occasions.

An adtech DSP/SSP platform, mobfox's core handled four billion ad requests per hour with its reactive Java core. My involvement in the project was mostly in the UI team, where we strived to upgrade the startups phase codebase in PHP and jQuery to a React client and a Java-based API back end. I worked on-premise in the Agile Scrum team on the back end and front end. The project was discontinued after an ownership transfer of the company, but the website shows the new rebranded software.

A social platform for connecting people, liza.network was developed in the early 2010s. When I joined the project, the legacy code was already giving us headaches. The back end was based on a professionally designed PostgreSQL database coupled with an aging PHP codebase, which I improved. The front end was based on Backbone.js but heavily reliant on proprietary jQuery-based logic, which I cleaned as much as possible while implementing the client's new feature requirements.

A data management system with several integrations in sectors such as construction, education, and social networking. The factline Community Server (FCS) is based on a heavily designed, data object model, PostgreSQL database developed way back in 1995. As a full-stack developer, I worked with Perl and Mason on the back end and vanilla and jQuery on the front end. We strived to keep the system running smoothly on the hosting options available at the time and subsequently implemented all the customized integrations that are still used by customers today.

A proprietary CMS system that I started developing back in 2005. It was based on PHP and MySQL, mostly with jQuery in the front end. Subsequently, it was integrated into 60+ websites, shops, and CRM solutions, and was constantly upgraded to current standards all the way up to 2015.