Контактна інформація

Отримати контакти цього кандидата можна на сторінці https://www.work.ua/resumes/10619899/

Досвід роботи

AI Automation Engineer

з 08.2026 по нині (3 місяці)
Self-employed, Дистанційно (IT)

Independent projects: AI systems and integrations built end to end, each with its own evaluation, so the numbers are measured, not estimated.
- Doc to CRM: invoices and delivery notes (PDF or phone photo) into ledger entries. 90% fully correct on 40 documents; review routing 88.9% recall, 0 false alarms. The model's self-reported confidence was 1.00 on 36 of 40, wrong ones included, so routing uses cross-checks.
- Inbox Agent: tool-calling agent that stops before irreversible actions. 8 scenarios: correct first tool every time; 6 irreversible actions attempted, 0 executed without a human.
- KB RAG Assistant: RAG over a private knowledge base, 122-question golden set, live on Hugging Face Spaces.
- Outbound Lead Engine: lead generation pipeline (enrichment cascade, scoring, LLM emails with fact checks, signed webhooks, kill switch). 29 of 30 emails valid on the first answer, $0.38 per 1000.
- Shop Pulse: online-store dashboard with an AI assistant whose every number is checked against the data. 15 of 15 questions answered, all 53 numbers verified, median 0.74 s.
- Ad Watch: Meta Ads and Google Ads watchdog with Telegram approval buttons; nothing changes until a person taps. Creative fatigue found in 86.6% of cases at 100% precision, on mocks in real API formats.
- Temu, OpenCart and SAP sync: sales and stock where SAP overwrites stock every 15 minutes. 30-day simulation: 0.1% oversell vs 22% with naive stock updates.
Stack: Python, FastAPI, Pydantic, Postgres, pytest, Gemini, Groq, n8n, Docker, Vercel, Hugging Face Spaces.

Automation AI Engineer (n8n/JavaScript/Python) | Full-Stack Developer

з 06.2025 по 07.2026 (1 рік 2 місяці)
Hajus AG, Дистанційно (IT)

Built automation, integrations, and self-hosted Python infrastructure for pan-European e-commerce operations.

- Designed and maintained 350+ workflows in n8n.io and Windmill across 11+ marketplaces (Amazon, Bol.com, eBay, Mirakl, OBI/VTEX, Metro DE, Praktiker.de, Pigu, Aukro, Okazii)
- Built 5+ production Python micro-services on Coolify (FastAPI/Flask + Playwright + Docker): marketplace publishing, stock sync, UI automation with TOTP 2FA; health-checks, cron, memory limits, GitHub auto-deploy
- Integrated Odoo (JSON-RPC) ↔ Bitrix24 ↔ marketplace APIs into a unified pipeline for orders, invoicing, and delivery confirmation
- Ran ~28 Amazon SP-API processes on two seller accounts: stock and price via Listings Items API, orders and shipment confirmation, Feeds, Reports, buyer messaging, restricted-data tokens
- Built Pricing Intelligence System: detects negative-margin products, fetches competitor prices via SerpAPI, auto-updates prices with custom JS algorithm
- Developed eBay ↔ Odoo messaging: auto-fetch buyer messages, create support tickets, reply back to eBay
- Implemented AI categorization and content generation (OpenAI, Gemini, xAI Grok incl. Vision) with structured output and fallback chains
- Architected AWS image pipeline (S3 + CloudFront + Thumbor), cut hosting costs by 70%; Bitrix24 error monitoring improved reliability by 40% and cut manual processing time by 60%

Tech Stack: n8n.io, Windmill, Python, JavaScript, FastAPI, Flask, Playwright, Docker, Coolify, Odoo (JSON-RPC), Bitrix24, VTEX, Metro DE, eBay, Mirakl, AWS, OpenAI, Gemini, xAI Grok (Vision), SerpAPI

Front-End Developer (internship)

з 11.2023 по 11.2024 (1 рік)
SoftServe, Львів (IT)

- Participated in a volunteer project, gaining hands-on experience with new technologies and delivering projects under tight deadlines.
- Developed user-friendly web applications using HTML, SCSS, and React.js, with backend development in Node.js.
- Managed project version control via Git and automated workflows with GitHub Actions, ensuring seamless collaboration.
- Ensured code quality with SonarQube and performed unit testing using Jasmine, Jest, and React Testing Library.
- Key technologies: SCSS, React.js, Node.js, MongoDB, Git, GitHub, SonarQube, Jasmine, Jest.

Project Engineer

з 06.2016 по 10.2022 (6 років 5 місяців)
Eco -Techgroup, Львів (Будівництво, архітектура, дизайн інтер'єру)

- Led end-to-end management of engineering projects, including cross-functional team collaboration, site visits, documentation review, and compliance assurance.
- Efficiently handled procurement, budget monitoring, and client/stakeholder communication, ensuring project success and satisfaction.
- Dedicated time to creating drawings, generating business offers, and maintaining communication with clients.

Освіта

European University

Computer Science (with Honors), Львів
Вища, з 2022 по 2023 (1 рік)

I completed a Master's program in Computer Science at the European University, solidifying my theoretical foundation and complementing my practical experience gained through various IT-related projects.

Lviv National Environmental University

Energy and Electrical Engineering Systems, Львів
Вища, з 2009 по 2016 (7 років)

Додаткова освіта та сертифікати

SoftServe Academy - COMPLETE WEBUI ENGINEER COURSE

10/2022-12/2023
Сертифікат

EF SET English Certificate 57/100 (B2 Upper Intermediate)

2024, травень
Сертифікат

Angular (ITWDN)

грудень 2023 - лютий 2024
Сертифікат

IBM Generative AI Engineering Professional Certificate

2026, серпень
Сертифікат

Generative AI Engineering with LLMs Specialization

2026, серпень
Сертифікат

Google AI Professional Certificate (Coursera)

2026, липень
Сертифікат

AI Fluency: Framework & Foundations (Anthropic)

2026, липень
Сертифікат

Claude Code 101 (Anthropic)

2026, липень
Сертифікат

Python for Data Science, AI & Development (IBM)

2026, липень
Сертифікат

AI Agents Fundamentals (Hugging Face)

2026, червень
Сертифікат

Знання і навички

• Стресостійкість
• HTML
• JavaScript
• SASS
• GitHub
• TypeScript
• Bootstrap
• Redux
• React
• CSS
• Node.js
• Figma
• WordPress
• Git
• JQuery
• Webpack
• Gulp
• AI integration
• GenAI
• FastAPI
• Docker
• Python
• N8n
• SQL
• REST API
• PostgreSQL
• AWS IAM
• Playwright
• AWS
• Amazon SP-API

Знання мов

• Англійська — вище середнього
• Українська — вільно

Додаткова інформація

Portfolio: https://portfolio-shamarin-leonid.vercel.app
LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація»)
GitHub: https://github.com/LeonidShamarin

Automation AI Engineer with production experience in workflow automation, e-commerce integration and self-hosted Python services. Over the past year built 350+ n8n/Windmill workflows and 5+ FastAPI/Flask micro-services for a pan-European multi-brand retailer, with integrations across 11+ marketplaces (including ~28 Amazon SP-API processes on two seller accounts), cutting image hosting costs by 70%, manual processing time by 60% and improving reliability by 40%.

Now building and evaluating AI systems end to end: document extraction (90% fully correct on 40 real documents, human-review routing at 88.9% recall with zero false alarms), tool-calling agents that stop before irreversible actions, and RAG over private knowledge bases. Projects with live demos and public code: Doc to CRM, Inbox Agent, KB RAG Assistant, Outbound Lead Engine, Shop Pulse, Ad Watch (Meta and Google Ads), Temu, OpenCart and SAP sync.

Comfortable across the stack: Python backends (FastAPI/Flask), DevOps (Docker, Coolify, Hetzner, Cloudflare, GitHub Actions) and frontend (React, Angular, TypeScript).