Saša Kocić

- maintained a big monolith in Ruby on Rails - led a team of 4 developers - reviewed code - managing of releases on GitHub with Buildkite and JIRA - handled GDPR deletions - part of Roles and Permissions re-architecturing - managed AWS Services and resources

- maintained Digital Banking API used for person and business identifications during Know Your Customer process of identifying new clients - maintained Infrastructure As Code through Terraform - maintained and monitored with Grafana various microservices in AWS in Ruby with Grape - fixed bugs reported by Sentry - GDPR deletion and recovery of customers in Postgress, MariaDB and S3 on AWS - Creation of User Stories and refining JIRA tickets for the Kanban workflow management - Executed production tasks

Cryptostruct GmbH is a cryptocurrency trading platform providing market statistics and historical market data. - Implemented connectors for trading platforms that collects instruments, exchange rates and other data - Refactored core-data updater in own repo with CI and deployment phar autobuild - Introduced Doctrine2 ORM for database access - Implemented logging with multiple loggers like Graylog, REST import of statistics, frontend display with datatables and their download from Amazon S3

Maintenance of the frontend and backend codebase in Ruby. Implemented Mixpanel, Adjust and Leanplum, Vagrant automation, Docker for pull-requests review, various APIs and webhooks for automation, worked on porting front-end to Angular, maintained docker deployments, introduced Gitlab for versioning and worked with Bitbucket, developed calculation of instructor's salary, Rspec testing and Rubocop for code quality. Used MySQL databases, Firebase and Redis. Created various rake tasks for batch data processing.

Maintenance of the Game backend in Li3 framework with a rich technology stack of MySQL, Redis, MongoDB, Memcache, RabbitMQ on microservices. ​Implemented login integrations for ​social networks like facebook (vkontakte, naszaklasa, minijuegos, rambler) and payment with vkontakte and rambler. Created a tool in Laravel for managing tracking of user activities and pixels Monitoring done with rsyslog, Splunk and Kibana Various reports using MySQL in Periscope Google Analytics E-commerce implementations

Maintenance and development of shop application for payment on Zend Framework 2. Implementing different payment providers, order processing and corrections, game payouts. Created an engine for tax&fee calculations based on rules, worked with mysql and couchbase databases and ran migrations with liquibase and phinx. Wrote automated tests using phpunit, prophecy and codeception. Used git and svn for code collaboration and composer for package management.

Managing the Belgrade office, maintenance and deployment of the code, virtual machines, writing JIRA tasks and documentation. Holding SCRUM meetings, code reviewing and administration.

Programming for ad services (like retargeting, advertising pixels, ..) in Zend PHP environment on Mac OSX located on Amazon virtual machines. Worked and tested them with PHPUnit and Selenium on Eclipse and Netbeans IDE.

Programming, Algorithms, Databases, Logic