Web developer

My main responsabilities include:

     - planning and implementation of a migration script for the media content and MySQL database as part of a major website upgrade
     - development of a native Android mobile app based on Cordova

- implemented cron jobs using PHP to automate the process of generatng sales and subscription reports based on data fetched from sharded databases and distributed silos in MySQL databases
- used various PHP frameworks, such as PHPExcel and PHPMailer, in order to generate the reports and handle the mass reporting flow.
- developed an internal tool to look up partners or internal development team members and manage their access level to the other internal tools
- automated and simplified the archiving of data between multiple MySQL database silos using cron jobs written in PHP

I developed a survey system using PHP and MySQL database as back-end and HTML5/CSS3, with the following functionalities:
- survey management page for managing surveys, questions and standard answers
- admin management page to manage users who can access the survey management interface
- generate Excel reports with the statistics of a given survey tool to another
- simple survey interface with questions, standard answers and custom answers.

I've also helped with the migration process of the employees monthly head count from one format to another

I developed a number of progressive web apps, for which I focused on:

Back-end development
    - Designed and implemented a system of microservices based on PHP
    - Developed various REST APIs

Database and app data storage
    - Designed the database schemas based on MySQL and SQLite, including necessary stored procedures and events
    - Worked with key-value data stores, such as Redis and Memcached
    - Worked with message queue solutions, such as Apache Kafka
    - Worked with various client-side storage solutions, such as Local Storage, Session Storage and Indexed DB.

Front-end development
    - Designed and implemented a semi-synchronous Javascript modular system
    - Designed and implemented an API for tracking user actions, useful for analytics
    - Designed a CSS grid library based on Flexbox
    - Designed and implemented a number of generic and extendable UI elements, such as: date pickers, spinners, content cards, modals, tooltips / overlays, range sliders

Infrastructure
    - Developed and integrated various tools to provide service discovery and communication between services
    - Developed scripts to automate the scaling, provisioning and deployment of the cloud infrastructure
    - Configured group replication as part of the load-balancing and failover strategy

Tools and testing
    - Designed and implemented various tools, such as:
        - SVG Icons to Sprites compiler
        - Database optimization scripts for MySQL
        - Dynamic configurations compiler based on JSON
        - Core functionalities of an AI decisional system

Code organization and development
    - worked with git as version control system
    - worked with Gulp as build system for static content