Increased the system's scalability by transforming a monolithic application into a service-oriented architecture (SOA).

Created and implemented a centralized logging system in SOA.

Developed a system to facilitate seamless integrations with third-party platforms.

Developed a robust scheduling module for tournaments.

Debugged multiple microservices simultaneously in the Kubernetes cluster and Kafka almost every day.

Created gRPC API for various configurations and fast communications.

Developed a front-end app on Vue for students' account management.

Developed a back-end app on Python and Django for content storing and user authentication.

Built CI/CD pipelines for each app, wrapping them in Docker.

Built an RFID authentication and authorization system using a Raspberry Pi connected to the server.

Created an SMS-sending system using Arduino, Python, and Sim800L.

Built a multichannel audio player on Java using RxJava.

Developed a multichannel web audio player using Web Audio API, RxJS, and TypeScript.

Constructed a storage server where audio content is uploaded during recording using Spring Boot and Vue.

Created an export feature for the storage server that processes the audio according to the user's needs using FFmpeg.

Built a back-end server on Kotlin/Spring Boot for the transcript management platform.

Designed a scalable system for an automated auction bidder application.

Set up an AWS environment, VMs, databases, and serverless; performed cost optimizations.

Built monitoring services and a high-level alert system on serverless.

Talked with potential clients about improving the app's features.

Worked with the QA to fix existing bugs in the application.

Held daily scrum meetings, discussing the current state of the projects, upcoming tasks, difficulties, timelines, and architectural development strategy.

Built the front end of a geospatial data collector web app using OpenLayers and JavaScript.

Developed the geospatial data collector web app's back end on Spring Boot.

Created a web map service custom caching server for speeding up the map services.

Connected GeoServer, a custom WMS cache server, and a Spring Boot-based app for better mapping performance.

Designed the database structure for the geospatial data collector app in Oracle.

Created a web app for operators to take surveys for a call center.

Developed a monitoring system that notified the support team if something went wrong with the app.

Collaborated with operators on the app design to achieve a good user experience.

Constructed the admin panel so that the client could customize surveys.

Implemented continuous integration and deployment using Travis, Docker, and Heroku.

Organized legacy applications, their Git repositories, CI/CD, production/development environments, development processes, etc.

Integrated Stripe and Twilio APIs for payments and messaging.

Drew the whole architecture of the existing monolith and planned on how to migrate it to microservices and make it scalable.

Studied Oracle technologies in-depth and created the database structure for a test application.

Created an application for playing cards online with a maximum of four other people (native JavaScript and PHP).

Developed an Android app that showed the weather forecast.

Studied design patterns and designed difficult structures using them.

Studied and implemented object-oriented programming (OOP) and functional programming.