Oleksii – Python, PHP, Django

Military project

• Created design and architecture;
• Drew up technical documentation;
• Conducted technical audit;
• Team management and mentoring;
• Carried out feature implementation.

A secure e-counselling platform that makes therapy accessible and affordable to anyone. They connect clients with fully licensed, thoroughly vetted therapists who draw on evidence-based approaches.

• Participated in the architecture and solution audit as an external consultant;
• Highlighted problems and bottlenecks;
• Suggested architectural solutions based on the company's requests.

Big data and AI-based solutions for sales growth, offering the capabilities of advanced IT infrastructure:

• Monitoring and control of the key KPIs across all operations;
• Ensuring product on-shelf availability in real-time;
• Digital transformation and data management in retail.

• Solved the most problematic part of the company's architecture - a legacy self-made ETL solution for massive amounts of data with poor maintainability and scalability (written in .NET). Successfully designed and implemented new production-ready scalable and maintainable ETL using Airflow, Python, PostgreSQL, ClickHouse.
• Worked in different departments (Python, PHP, .NET): created new services and components, resolved complex issues, RnD;
• Was responsible for DBs: modeling, profiling, and scaling;
• Improved overall company architecture;
• Took part in coding complex tasks and code reviews;
• Created tech documentation and schemas;
• Led and mentored the teams.

An international cargo management system.

• Made a decision on the technological stack;
• Designed the DB and backend from scratch;
• Led the team and took part in coding;
• Successfully implemented MVC.

AI-driven and industry-proven platform that solves on-shelf product availability issues in real-time and provides immediate actions to drive availability, sales, and store labor.

During this project, the developer followed a career path from a senior software engineer to a tech lead and software architect:

• Created the first MVP using PHP, MongoDB, RabbitMQ, and Gearman;
• Created production-ready solutions with a service-oriented approach (Python, PHP);
• Migrated DB to PostgreSQL;
• Prepared the system for production and big data;
• Contributed to different departments with different tech stacks: backend, middleware, BI, DS;
• Worked with monoliths, services, distributed jobs, queues, and caches;
• Worked extensively with DBs: schemas, non-trivial queries, and performance optimization.

A leading YouTube Multi-Channel-Network (MCN), an influencers-focused development platform for content, experiences, products, and brands. It works with international creators and brands to develop, manage, distribute, and commercialize products, experiences, content, and IP.

• Refactored legacy YouTube partnership system highly integrated with YouTube API and services;
• Created a new production-ready version on the top of the fastest PHP framework at that time (Phalcon PHP).