Олександр

Oleksandr Pelepets
Senior Python Engineer & AI/RAG Specialist
Kharkiv, Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section)
GitHub: github.com/chernysh2909 | Telegram: @s_pelya

Professional Summary
Senior Backend Engineer and AI Specialist with over 6 years of experience building scalable web
applications, autonomous agents, and enterprise automation solutions. Specialized in Python
architecture (FastAPI, Flask), AI/RAG workflows (LangChain, LlamaIndex), and complex retail
integrations. Focused on delivering clean, maintainable code and measurable business outcomes
through reliable infrastructure and CI/CD pipelines.

Technical Skills
● Languages: Python, JavaScript (ES6+), SQL, PHP
● Backend & Architecture: FastAPI, Flask, Node.js, RESTful APIs, Model Context Protocol (MCP)
● AI & Automation: RAG architectures, LangChain, LangGraph, LlamaIndex, OpenAI API, n8n,
OCR integrations
● Databases: PostgreSQL, Redis, Alembic, MongoDB, MySQL
● DevOps & Infrastructure: Docker, VPS hosting, Ubuntu server administration, CI/CD
pipelines, AWS

Professional Experience
SMART SOFT WEAR COMPANY LTD — Senior Python Engineer & Backend Architect
2019 – Present | Ukraine

● Architected and developed internal web systems and automation tools to streamline
enterprise workflows and reduce manual effort.
● Designed and deployed RAG-based helpdesk assistants using LangChain and OpenAI to
resolve internal queries from company documentation, integrating OCR for scanned PDFs.
● Engineered a FastAPI-based SNMP polling system and integrated corporate infrastructure
with internal ERP/CRM systems to optimize retail operations and data consistency.
● Developed internal chatbot suites (Telegram & Viber) using Python and PostgreSQL,
automating routine tasks, alerts, and customer interactions.
● Spearheaded technical integrations for major physical retail expansions, managing server
infrastructure, local networking, and Docker-based CI/CD pipelines.
● Maintained and enhanced e-commerce modules with custom pricing logic, order flows, and
third-party API integrations, significantly improving checkout reliability.
Coproquest — Frontend Web Developer
2018 – 2019

● Supported and enhanced corporate web products, focusing on UI/UX improvements and
page load performance optimization.
● Implemented responsive interfaces and collaborated cross-functionally with designers and
backend engineers to deliver high-quality Agile releases.

TopPromotion WebStudio — Frontend Web Developer
2014 – 2017

● Developed landing pages and corporate websites, integrating SEO and analytics to drive
digital marketing campaigns.
● Migrated legacy codebases to modern CMS platforms and provided ongoing technical
maintenance.

Education
Ukrainian State Academy of Railway Transport (Kharkiv)
Faculty of Information and Control Systems and Technologies — Telecommunications & Radio
Engineering (2016 – 2021)

Languages
Ukrainian (Native), Russian (Native), English (Intermediate / Technical Fluency)