- MySQL (MariaDB fork): designed and maintained relational database for the automation system;

- Crons: successfully set up cron jobs for periodic system tasks;

- Celery: provided offloading long-running tasks from the main web server to improve performance, handling background tasks, such as sending emails, data processing, and scheduled tasks in couple with Django-celery-beat;

- Redis: used as a message broker for Celery to facilitate task management and communication;

- WhiteNoise: simplified static files serving;

- Developed two user panels with Bootstrap, CrispyForms, DjangoForms, JQuery catering to both parents and personnel. Ensured that the design was responsive, providing a satisfying user experience for both mobile and desktop users;

- Implemented a ranking system for the applications sent to the kindergartens by the parents to obtain a voucher;

- Carried out testing of all the functionalities with manual approach using regression as functional testing, black box as change-related testing, unit and integration as white box testing methods;

- Apache: used as a web server enabling HTTPS encryption;

- Hosting management: establishing of a new domain for the website, installation of the appropriate packages and database administration were performed;

- JUnit: ensured the reliability and quality of Spring and Java apps;

- Tomcat: web server deployment;

- Spring MVC: developed dynamic and scalable web applications;

- Spring Data: gained proficiency in accessing and manipulating data stores;

- Databases (JDBC, JPA): broadened my understanding of database management, enabling me to interact seamlessly with databases in Java applications;

- SSH, MySQL, PostgreSQL: supporting Linux servers, administration of relational databases;

- BS4, Selenium, pandas, asyncio, aiohttp, HTMLSessions: web scraping, parsing and web automation of tickets purchasing, form submission, client’s data investigation;

- JS, VueJS, PHP, Python, Flask, WTForms: client management system development introducing filtering, searching, PDF reports downloading;

- Api integration of third-party services concerning reviews, client contacts;

- Database design and optimization to handle big data sets about 50+M records;

- being adaptable and responsive to changes in client requirements with communication, active listening, brainstorming, team collaboration skills;