Vitaliy

Vitaliy Parygin
Senior Python Backend / AI Engineer | AI Agents | ERP Automation | Python • FastAPI
• Odoo • Docker • RAG • LLM • PHP

Dnipro, Ukraine | [відкрити контакти](див. вище в блоці «контактна інформація») | GitHub | Telegram App

Professional Summary
Senior Python Backend Engineer with 16+ years of commercial software development
experience and 6 years specializing in Odoo/ERP systems.

Experienced in designing scalable backend services, REST APIs, business automation
platforms, and enterprise integrations using Python, FastAPI, PostgreSQL, Redis, Docker,
and modern backend architecture.

Recently focused on AI-powered backend systems, Retrieval-Augmented Generation
(RAG), LLM integrations, multi-agent architectures, and intelligent business process
automation.

Looking for Senior Python Backend / AI Engineer opportunities where backend engineering
and Generative AI intersect.

Experience with: C/C++, Pascal, Assembler

AI / LLM Experience
Strong interest in AI-powered backend systems, LLM integrations, and agent-based
architectures.

Experience includes:
● OpenAI API
● ChatGPT integrations
● AI automation workflows
● Prompt engineering
● AI-powered business process automation
● Python backend services for AI integrations
● REST API orchestration
● Async/background task processing
● Telegram bots and conversational workflows
● Data processing and ETL pipelines
● FastAPI microservices
● Dockerized AI-related services

Currently expanding expertise in:
● LangChain / LangGraph
● AI Agents
● Multi-agent systems
● RAG pipelines
● Vector Databases (Qdrant)
● MCP / tool calling architectures
● AI Workflow Orchestration
● LLM Tool Calling
● AI workflow automation

Looking for opportunities as:
Senior AI/LLM Python Developer, AI Backend Engineer, AI Agent Developer, or GenAI
Engineer.

Selected AI Projects

AI ERP Assistant (in progress)
Production-grade multi-agent AI assistant for ERP systems.

Stack:
● Python
● FastAPI
● LangGraph
● LangChain
● OpenAI
● Qdrant
● PostgreSQL
● Redis
● Docker
● LangFuse Key Features
● PDF ingestion pipeline
● Document parsing and chunking
● Embedding generation
● RAG pipeline
● Multi-agent orchestration
● Conversational memory
● Streaming responses
● Vector search
● Tool calling
● Citation generation
● Observability

Technical Skills

AI / LLM
● LangGraph
● LangChain
● OpenAI API
● RAG
● Vector Databases
● Qdrant
● Embeddings
● Prompt Engineering
● AI Agents
● Tool Calling
● Conversational Memory
● LangFuse
● RAGAS

Programming Languages
● Python
● PHP
● JavaScript
● SQL

Frameworks / CRM
● Odoo / OpenERP
● FastAPI
● Flask
● Django
● Laravel
● Symfony
● Yii / Yii2
● Zend Framework
● SuiteCRM
● SugarCRM
● CakePHP
● WordPress
● Kohana Framework

Databases
● PostgreSQL
● Qdrant
● MySQL
● Redis
● MSSQL

ORM
● Doctrine ORM
● SQLAlchemy

Backend & Integrations
● Python
● FastAPI
● AsyncIO
● Flask
● SQLAlchemy
● Pydantic v2
● REST API
● SOAP
● RabbitMQ
● ElasticSearch
● ETL
● Memcached
● JSON / XML
● Cron jobs

Architecture
● REST APIs
● Microservices
● Event-driven Architecture
● ETL Pipelines
● Message Queues (RabbitMQ)

DevOps & Infrastructure
● Docker
● Linux
● Nginx
● Apache
● SSH

● Vagrant

Testing & Monitoring
● Pytest
● Unittest
● PHPUnit
● SonarCloud
● Locust
● Postman
● Custom auto tests

Frontend / Web
● HTML / CSS
● JavaScript/Jquery
● SCSS / LESS
● Bootstrap
● jQuery
● AJAX

Tools & Methodologies
● Agile / Scrum
● Jira
● Redmine
● Confluence
● Asana
● Code Review
● Team Management
● Git
● SVN
● Mercurial

Professional Experience
ISD — PHP Developer
Sep 2024 – Dec 2025

Responsibilities

● Backend development and maintenance of internal business systems
● API integrations and optimization of existing services
● SQL query optimization and debugging
● Participation in code reviews and production support

Technologies:

PHP, Python, MySQL, Redis, Docker, Git

Solvve — Python / Odoo Developer, Full Stack Developer
Mar 2015 – Aug 2024

Responsibilities

● Development and customization of Odoo/OpenERP modules
● ERP integrations with external systems and APIs
● Backend architecture and business logic implementation
● Development of REST services and automation tools
● Database optimization and ETL processes
● Participation in full project lifecycle from planning to deployment
● Support and maintenance of production environments

Key Achievements

● Developed and maintained enterprise Odoo solutions
● Designed REST integrations with third-party platforms
● Optimized PostgreSQL queries for high-volume business processes
● Built backend services for ERP automation
● Participated in architecture design and production deployments
● Led code reviews and mentored developers
● High-load systems

Technologies:

Python, Odoo, PHP, PostgreSQL, FastAPI, Flask, Docker, Redis, RabbitMQ, ElasticSearch,
JavaScript, Git, GitMaster

PrivatBank — PHP / Full Stack Developer
Feb 2014 – Mar 2015

Responsibilities

● Development and maintenance of internal banking web applications
● Backend and frontend feature implementation
● Integration with internal services and databases

Technologies

PHP, JavaScript, MySQL

EnglishHouse — PHP Developer
Sep 2013 – Mar 2014

Responsibilities

● Website development and support
● Backend feature implementation
● CMS customization

T3Leads — PHP / Full Stack Developer / Team Lead
Jun 2012 – Sep 2012

Responsibilities

● Team coordination and task management
● Backend development and project maintenance
● Integration and optimization tasks

Unicorn — Web Developer / PHP Developer
Aug 2010 – Aug 2012

Responsibilities

● Web application development
● Backend feature implementation
● Client support and maintenance

PintaWebWare — Web Developer
Dec 2009 – May 2010

Responsibilities

● Website development and maintenance
● Frontend and backend support

Education
● National Mining University (2005 – 2010)
● DTEK College (2002 – 2005)

Languages
● Ukrainian — Native
● English — B1-B2