* GIT, * Linux, * bash scripting* Python* JavaScript* PHP* Project Management

* GIT, * Linux, * bash scripting* Python* JavaScript* PHP* Project Management

• Development and maintenance back-end (PostgreSQL / Python with Django and FastAPI / Docker / PHP / Laravel /MySQL)Assisted in identifying and resolving front-end issues using TypeScript• Designing and developing an AI testing tool to streamline and automate testing processes, as well asintegrating AI functionalities with Slack to enhance team communication and productivity.• Integration with external services (mostly REST)• Writing unit, functional, behavioural and end-to-end automation tests, and writing documentation• Design and building a new architecture of the microservices• Deployed applications using AWS CodeDeploy• Mentoring and guiding lower-level developers

Migrating backend from nodeJS to PHP. * PHP7 (Symfony)* TypeScript (GraphQL)* PostrgreSQL

• development and maintenance back-end (Python / Django, REST API, PHP/MySQL/PostgreSQL, Docker, Vagrant)• integration with external services (mostly REST) • writing unit and functional tests, and writing documentation

* incident management - prevention and troubleshooting* designing and development and management of websites monitoring tools* designing and development of tools for help desk team* designing, development and management of tools for transfer data from external monitoring* designing and development of internal framework for web developers* designing and development of CMS for editors and web developers* providing technical guidance to work colleagues* writing unit tests* providing documentation

* designing and development of billing system for resellers* keeping interconnection* keeping proper telecom billing systems* ensuring the security of the data stored in billing systems* management business processes billing systems* expanding existing functionality of applications related to billing (Asterisk/OpenSIPs)* designing and development of automated financial systems like wholesale invoice correction or data * transfers

* keeping proper telecom billing systems * keeping interconnection * performing maintenance activities related to billing systems * preparing reports and accounts with billing systems * creating new and expanding existing functionality of applications related to billing * management business processes billing systems * working with suppliers billing systems for the operation, technical support and modernization * supporting for work colleagues in the use of billing systems and conducting training in handling these systems * ensuring the security of the data stored in billing systems * reporting and accounting system errors to the service provider system

* designing and development of e-commerce online system (http://size.euroland.pl)* team management* servers administration