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AI Automation Developer · AI Voice Agents · Full-Stack AI Products
Tetiana Kotolup

Tetiana
Kotolup

n8n · OpenAI GPT-4o · Anthropic Claude · Telegram Bot API · AI Voice Agents · Node.js · TypeScript · PostgreSQL · React

I design and build production-ready AI automations, voice agents, and full-stack AI products — from n8n pipelines and AI phone agents to SaaS backends with PostgreSQL. From idea to live system, systematically and predictably.

15
Projects
9
Certificates
4
Live SaaS
AI
First approach
01

About me

Who I am

Tetiana Kotolup — AI Automation Developer. I build n8n automations, AI voice agents, Telegram AI bots, and full-stack AI SaaS products with Node.js, TypeScript, PostgreSQL, OpenAI, Anthropic Claude and React.

Education
Junior Specialist Diploma
Cherkasy State Business College · 2017
Specialization: Computer Systems Technician

✓ Nostrified in CZ · 18-20-M/01 Informační technologie · KÚ JMK 2021

Completing the AI No-Code Developer program. 4 live AI SaaS products deployed in production.

My approach
Analyse business processes and find time-loss bottlenecks
Design AI-agent logic tailored to the specific task
Build AI voice agents with natural conversation flow
Deploy production backends with PostgreSQL, Prisma, Supabase
Test on real scenarios and optimise token costs
Evaluate ROI of automation and SaaS implementation
Tools & Stack
n8nOpenAI APIGPT-4o Anthropic ClaudeTelegram Bot APITelegraf Node.jsTypeScriptExpress.js React.jsPostgreSQL Prisma ORMSupabaseJWT AssemblyAIDALL-E 3 VapiRetell AIBland AI Google Sheets APIGoogle Calendar API Google Drive APIGmail API REST APIWebhooksNocoDB VercelRender JavaScriptGoogle CloudHTML/CSS
02

Work Experience

AI Automation Engineer

HAPP (Freelance / Contract)

Apr 2026 – Jun 2026

  • Designed and developed AI-powered workflows using n8n.
  • Built AI voice assistants and Telegram AI bots for customer communication.
  • Integrated OpenAI API, REST APIs, webhooks, CRM systems and Google Sheets.
  • Automated lead qualification, customer support and business workflows.
  • Implemented prompt engineering and optimized AI workflows for production use.
  • Collaborated on deploying AI automation solutions that reduced manual work and improved operational efficiency.
Technologies
n8nOpenAI APITelegram Bot APIREST APIWebhooksGoogle SheetsCRMJSONPrompt EngineeringAI Agents
Full-Stack Developer

Freelance

2023 – 2025

Delivered production web applications across Real Estate & Construction and e-commerce industries — full cycle from requirements to deployment:

  • Eco Italia Link — full-stack React + Node.js online shop with product catalog, cart, checkout, admin panel and email notifications. Deployed on Railway. [GitHub]
  • HouseFixBrno Link — business website for a construction company. End-to-end: client communication, design, frontend & backend, testing, deployment. [GitHub]
  • Built landing pages, multi-page sites and portfolio sites; integrated contact forms, product catalogs and basic CMS functionality.
Stack
HTML5CSS3JavaScriptReact.jsNode.jsExpressREST APIThree.jsGitGitHub PagesRailwayTildaWordPress
03

Key Expertise

01 Workflow Automation n8n pipelines with complex branching, error handling, scheduled jobs, retry logic and webhook triggers. Used across all 12 n8n projects including LegisFlow, GrowthLab AI and AI call analytics.
02 AI Voice Agents Building AI voice agents with Vapi, Retell AI, Bland AI — natural conversation flow, function calling, CRM integration, appointment booking. Voice-first AI systems for sales and support automation.
03 AI Integration & Prompting OpenAI GPT-4o / GPT-4o-mini, Anthropic Claude, structured JSON output, multi-model ensemble evaluation, chunking for large documents, Financial DNA modeling, BANT qualification systems.
04 Telegram Bot Development Production Telegram bots via Telegraf (Node.js) and n8n: command routing, real-time alerts, voice processing, DALL-E image generation, usage-based SaaS limits. 6+ bots live in production.
05 Backend & API Development Node.js / TypeScript, Express.js REST APIs, JWT authentication, webhook-based event pipelines. Applied in WealthMirror AI, GrowthLab AI and AI CRM — deployed on Render and Vercel.
06 Database & ORM PostgreSQL with Prisma ORM, Supabase managed instances. Designed schemas for CRM (clients + appointments), financial user data, sales pipelines, usage quotas and SaaS monetization logic.
07 API & Service Integrations Google Suite APIs (Sheets, Calendar, Drive, Gmail), Zoho CRM, AssemblyAI, CoinGecko, OpenWeatherMap, PrivatBank, NocoDB DataTable. 12+ third-party integrations across projects.
08 Voice & Image AI AssemblyAI transcription pipeline with 30-sec polling, DALL-E 3 image generation from voice messages, PDF text extraction with chunking, voice-to-structured-data pipelines.
09 Frontend & React React.js dashboard for AI CRM — client management, appointment views, real-time webhook sync. HTML/CSS responsive interfaces, Vercel deployments. LegisFlow and GrowthLab web interfaces.
04

Certificates

GoIT · Course Certificate · Unique ID 46370
AI Automator
243-hour program: no-code automation with n8n, prompt engineering & AI agents, marketing/sales/customer-service automation, production-ready AI agent build
18 Jun 2026Verify ↗
Alison · CPD Certified · Diploma
Advanced Diploma in Brain and Behaviour
Cognitive processes and behavioural patterns — strengthens building human-centred automations
01 Jan 2026Verify ↗
Alison · CPD Certified · Certificate
AI Marketing
AI in marketing: content automation, personalisation, analytics. Business context for marketing automation
28 Jun 2025Verify ↗
EITCI Brussels · 2 ECTS · 86.67%
HTML & CSS Fundamentals
Responsive layout, Flexbox, Grid, CSS animations, forms, validation
Aug 2024Verify ↗
EITCI Brussels · 2 ECTS · 86.67%
JavaScript Fundamentals
Functions, arrays, objects, DOM, event listeners, debugging, Chrome DevTools
Aug 2024Verify ↗
EITCI Brussels · 2 ECTS · 66.67%
Google Cloud Platform
Compute Engine, Cloud Storage, BigQuery, Kubernetes Engine, Cloud Functions, GCP security
Jul 2024Verify ↗
EITCI Brussels · 2 ECTS · 60%
PHP & MySQL Fundamentals
Back-end development, databases, forms, sessions, XSS protection, error handling
Feb 2026Verify ↗
Great Learning · Certificate of Completion
ChatGPT for Business Communication
ChatGPT in business communication: automating correspondence, reports and presentations
30 Jul 2025Verify ↗
Femme Palette · 6-Month Mentoring Program
Mentoring for Professionals
12 hours of 1-to-1 mentorship from industry experts: goal setting, career development, strategy
—Verify ↗
05

Featured Case

AI Sales Ecosystem · n8n + Claude + Zoho CRM + Telegram

GrowthLab AI
Sales Automation Ecosystem

Company couldn't understand why leads were lost. Built AI ecosystem that qualifies leads automatically, analyzes all dialogues, and sends CEO reports to Telegram — 3 interconnected workflows running 24/7.

n8nAnthropic ClaudeZoho CRM Telegram BotGoogle SheetsPostgres MemoryAI Agents
Problem
  • Leads processed manually — high risk of loss
  • No systematic dialogue analysis
  • CEO had no quick report on funnel quality
  • Bottlenecks invisible until too late
Solution · 3 workflows
Chat
→
AI Agent
→
BANT
→
Zoho CRM
Dialogues
→
Postgres
→
AI Analysis
→
Sheets
Zoho
→
AI Analytics
→
CEO Report
→
Telegram
Process
  • Workflow 1: AI chatbot conducts BANT qualification
  • Collects business, budget, authority, need, timeline
  • Workflow 2: Analyzes all dialogues via Postgres Memory
  • Detects agent errors, client problems, success patterns
  • Workflow 3: CEO analytics of entire CRM funnel
  • Auto-generates HOT/WARM/COLD segmentation
Results
Quantitative
  • 100% leads
  • Auto-qualified
  • Zero manual work
Qualitative
  • Full transparency
  • Real-time insights
  • CEO visibility
Business
  • Scale-ready
  • Data-driven
  • Monetization-ready
06

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