Лена

LIENA VU
Automation & AI Integration Engineer
Ukraine • [open contact info](look above in the "contact info" section) • LinkedIn

PROFESSIONAL SUMMARY
Automation and AI integration engineer with 5+ years of software development experience, including hands-on delivery of production
automation systems for revenue-generating businesses. Specializes in secure, event-driven integrations between messaging platforms,
payment providers, and LLM services using Node.js and Make.com. Track record of replacing manual operational workflows with
autonomous systems — cutting administrative headcount costs, closing revenue leaks from missed payments, and running 24/7 without
human intervention.
CORE SKILLS
Languages & Frameworks: Node.js, Express, TypeScript / JavaScript (ES6+), Telegraf, Angular (Signals, RxJS, i18n)
Automation & Integration: Make.com (advanced scenario architecture), REST API design & integration, webhook-based event
processing, Google Sheets API, SQL
AI / LLM: OpenAI API integration, Retrieval-Augmented Generation (Supabase / pgvector), prompt engineering
Payments & Fintech: WayForPay, MonoPay — webhook signature verification, subscription lifecycle automation, isolated secrets
management
Infrastructure & Deployment: Render.com, Express middleware architecture, environment isolation for credentials
Data: Client/subscriber database design, Google Sheets-based reporting pipelines, Notion
PROFESSIONAL EXPERIENCE

Automation & AI Integration Engineer | Independent Contractor
May 2026 – Present • Remote · Ukraine
Design and build custom automation and AI systems for subscription- and course-based businesses, replacing manual operational
processes with self-sufficient, event-driven systems.
• Architected an end-to-end subscription billing automation for a Telegram-based membership community, bridging
payment-provider webhooks (WayForPay) with the Telegram Bot API; built a tiered dunning sequence (payment link → reminder
→ auto-removal) that autonomously recovers failed payments, closing a revenue leak across 100+ subscribers.
• Isolated payment-signature generation and API credentials in a dedicated service layer, removing secrets from the automation's
visible surface — a security pattern directly transferable to PCI-adjacent environments.
• Designed and shipped a telegram chatbot (Node.js, Telegraf, Supabase, OpenAI API) trained on 30+ hours of a subject-matter
expert's voice recordings to replicate brand voice; reached 300+ active users in month one on organic acquisition, with a
self-service free-to-paid upgrade funnel. The product demo
• Replaced a fully manual course-access provisioning workflow with an automated pipeline (Node.js, Make.com, Telegram Bot API)
triggered directly by payment events — eliminated a part-time administrative role and cut the business owner's weekly support
workload by 6 hours.

Frontend Developer — Enterprise Software
2020 – June 2026 • Ukraine
• Built web applications with React, Angular
EDUCATION & TRAINING
• AI Automation Specialist Training — production-grade Make.com scenario architecture;
• Taras Shevchenko National University of Kyiv 2016 – 2020 Bachelor of Science in Applied Mathematics

LANGUAGES
Ukrainian: Native
English: C1