Obrad Ćešić

I build AI assistants, automations and apps for businesses.

Chat and voice assistants that answer your customers, automations that handle emails and invoices, and internal tools that replace spreadsheets. Each one tested on real data before you rely on it.

Live app on the App Store and Google Play. Public demos with tests and code.

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Demos

Three demos you can watch, run and read the code of.

Bike workshop assistant

Answers prices and hours in three languages, hands repairs to staff with the photos, and sends quotes the customer can accept.

77 automated checks, 45 steps through n8n

Code ↗

Voice receptionist

Nora answers spoken questions for a dental practice in English or Slovenian and books appointments, only after the caller says yes.

14 of 14 test calls, about 2 s per reply

Code ↗

Document extraction

Emails, PDFs and photos of invoices turned into structured data. Totals are checked in code and a person approves each record.

103 of 103 fields, about $0.001 per document

Code ↗

Apps

Products I designed and built.

Live on the App Store and Google Play

Aron

A communication app for nonverbal children and adults. They tap pictures and the app speaks for them in Georgian, with the right word forms.

  • 3,600+ words, emotional voices
  • Four communication styles and an adult mode
  • Head-tracking for people who can't use touch
  • Used daily in therapy centres

Flutter · Firebase · Gemini text-to-speech · ML Kit

In development, private Android alpha

Jacob

A Georgian learning app: a path of short lessons from the alphabet to conversations, with spoken audio and letter tracing.

  • 223 lessons, explained in English, Russian or Greek
  • Works offline for the first 36 lessons
  • Georgia's historical scripts as an extra

Flutter · Gemini text-to-speech · Python content pipeline

More work

Operations planning app

Built for a client: one app for projects, daily job cards, crews, materials and hours, replacing Excel sheets and group chats. Staff describe a job in their own words and AI turns it into a job card.

Power Apps · SharePoint · Azure OpenAI

Kvant document assistant

Runs on the company's own computer and answers in Slovenian or English with links to sources. 15 of 15 test questions, plus 11 of 11 new ones.

Qdrant · Ollama · hybrid search · code ↗

Lead-to-offer automation

Finds leads, checks public registers, sends outreach, handles replies and writes PDF offers, with a person approving each one. Built for a client.

Python · Microsoft Graph

How I work

  1. Understand the job. We go through how you do things now and what should change.
  2. First version. Small tools: something working in about a week. Bigger ones: in stages.
  3. Test on real data. I measure how well the AI parts do before you rely on them.
  4. Hand over. You get the tool and instructions. Anything touching customers or money gets an approval step.

Tell me about your project.

Send a few lines about what you need. I reply within a day and give a fixed quote.

Time zone
CET, remote
Languages
English, Slovenian, Serbian/Croatian
Tools
Python, Flutter, Power Platform, Claude and OpenAI, n8n
Elsewhere
GitHub