- Initiated a process changing, introducing story point-based task measurement, enhancing predictability, improving measurement accuracy, and aligning team efforts with business objectives.- Actively contributed to key development phases: tasks decomposition, iteration planning, requirements gathering, and feature demo.- Improved application performance by 10% through the SQL query optimization.- Collaborate with other teams (Frontend, DevOps, and QA) to deliver features that meet sprint goals and deadlines.

- Designed and developed a flexible stories system to streamline and enhance app content production.- Created a Telegram bot with authentication and integrated it with our main authentication system.- Refactored 70% of the backend codebase to make it distributable to microservices using Domain-Driven Design.- Increased app performance by up to 6 times through the use of database indexes, asynchronous database queries, user authentication caching, and SQL query optimization.

- Fixed numerous high-priority bugs.- Implemented key app features: challenge completion, comment service, and leaderboard.- Created documentation from scratch.- Integrated with Stripe and Google billing systems.- Consistently worked with mentors for my professional growth and product code quality.

• Managed 80% of backend development under the supervision of the Tech Lead.• Implemented integration with Celery to use it as a background worker to enhance user experience..• Moved users accounts from old business platform to our product that allows us to release product.• Developed RESTful API endpoints to access platform content.