Oleksii Makeiev

Python Developer

N-iX • Período integral

Nov 2023 - Present • 2 yrs 6 mos

Worked on two projects: 1.Development of an AI assistant for a large international technology company. 2.Development of a turnkey e-commerce website for a foreign client. Project 1: Enterprise AI Agent for Global Tech Company ◉ High-Precision Email Classification: Engineered a GPT-4o mini pipeline to categorize incoming user inquiries (FAQs, Complaints, Returns). Achieved 94.2% accuracy with a confidence score > 90%, enabling 100% automated ticket routing and eliminating manual sorting. ◉ Resilient Fallback Architecture: Designed a multi-LLM failover architecture (OpenAI -> Anthropic), achieving zero downtime during provider outages. ◉ Big Data Performance: Processed massive datasets using Polars, achieving sub-second multi-threaded preprocessing. ◉ Production-Grade Advanced RAG: Implemented Hybrid Search (Qdrant + LlamaIndex) with RAGAS validation, ensuring elite-level context precision. Project 2: High-Performance E-commerce Ecosystem ◉ Backend Optimization: Slashed API response times to <90ms via Redis caching and PostgreSQL query optimization. ◉ Checkout Reliability: Reduced transaction errors by 25% through a robust cart module rewrite and Sentry monitoring. ◉ Scalable Architecture: Optimized Django ORM, resulting in 40.1% faster catalog loading for high-traffic environments. ◉ Agile Delivery: Improved sprint velocity by 15% through expert task estimation and technical leadership in Scrum. Technologies: Python, FastAPI, Polars, OpenAI API, LlamaIndex, Qdrant, Structlog, Django REST Framework, PostgreSQL, Redis, Celery, Docker, Git, GitHub, GitLab CI/CD.