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  1. Freelancers

Nazarii Tkachenko

Offer Nazarii work on your next project.

Ukraine Odessa, Ukraine
19 days 14 hours back
Very busy very busy
on the service 1 month 8 days
Freelancer Nazarii T. — Ukraine, Odessa. Core skill — AI & Machine Learning, Bot Development

Rating

Successful projects
No data
Average rating
No data
Rating
309
AI & Machine Learning 1
184 place out of 2855
Bot Development
351 place out of 1912

Language proficiency level

Українська Українська: fluent
English English: intermediate

Skills and abilities

Programming

Services

Promotion


Mobile development

Portfolio


  • 45 USD

    Nazarik AI — Personal financial assistant

    Bot Development
    Nazarik AI — Personal financial assistant — example of freelancer's portfolio work in category Bot Development
    Developed a mobile application with an AI assistant for managing personal finances. Integrated OpenAI GPT-4.1-mini with streaming responses, a behavioral engine, and personalized insights based on user spending. In the photo - the chatbot of the application.
  • 34 USD

    Nazarik Pro Paywall

    AI Art
    Nazarik Pro Paywall — example of freelancer's portfolio work in category AI Art
    Paywall and monetization — Nazarik AI PRO

    Task:
    Build a monetization system that converts
    … free users into paid ones.

    Solution:
    Freemium model with Trial and Paywall
    after the limit is exhausted.

    How it works:
    — Free: basic functionality + limited AI
    — Trial: full PRO access for a few days
    — After trial: choice of a paid plan

    Technical implementation:
    — RevenueCat SDK for managing subscriptions
    — App Store In-App Purchase
    — Google Play Billing
    — Supabase for checking subscription status

    Stack:
    RevenueCat · App Store IAP
    Google Play Billing · React Native

    Result:
    Complete monetization system ready for launch.
  • 56 USD

    Chat GPT-4 is integrated into the mobile application.

    Bot Development
    Chat GPT-4 is integrated into the mobile application. — example of freelancer's portfolio work in category Bot Development
    AI assistant in the mobile application — integration of GPT-4o

    Task:
    Add a smart financial assistant that analyzes the user's expenses and provides personalized advice — not template-based, but based on real data.
    …
    Solution:
    Integrated GPT-4o-mini through OpenAI API into the React Native mobile application.

    How it works:
    — The application transmits the user's spending context
    — GPT analyzes patterns and formulates a personal recommendation
    — The response appears in the UI as a message from the character Nazarik
    — In the Free version: 2 recommendations per week
    — In the PRO version: full AI chat without limitations

    Technical implementation:
    — Supabase Edge Function as a proxy to OpenAI API
    — Spending context is transmitted from the database
    — GPT-4o-mini for speed and low cost
    — GPT-4o Vision for scanning receipts (in development)

    Stack:
    OpenAI GPT-4o-mini · Supabase Edge Functions
    React Native · TypeScript

    Result:
    AI works in a real application.
    Personalized advice based on data — not generic responses.
  • 45 USD

    Mascots and the startup screen NAZARIK

    AI & Machine Learning
    Mascots and the startup screen NAZARIK — example of freelancer's portfolio work in category AI & Machine Learning
    Nazarik is a financial bro in your phone. Not just a tracker, but a character that gives hints, motivates, and sometimes roasts you for your expenses.

    What has been implemented:
    — Onboarding in the style of Instagram Stories
    … — Adding transactions with categories and colors
    — Statistics: chart + bar chart by months
    — Spending limits with a visual slider
    — SMART goal on the main screen
    — 17 achievements + streaks + PlayStation popup
    — AI assistant Nazarik on GPT-4o-mini
    — Push notifications and reminders
    — 3 languages: UA / EN / RU

Activity

  Latest proposals 10
Creation of an AI agent for the auto service (end-to-end application processing system)
1394 USD
Make automation
56 USD
Chat bot
45 USD
Creation of a website with an AI block
180 USD
Integration of marketplaces
56 USD
Telemarketer (outbound calls for refusals / customer returns)
90 USD
Make 4 solutions on Claude Code/Design
113 USD
AI agent in online school
90 USD
Need an HR/Recruiter who can find a salesperson for the store.
226 USD
AI automation of lead processing, CRM, and customer retention
451 USD