TropicVibe01 / 04
Real estate · web platform
From finding a villa to managing the deal.
Website, CRM and Telegram: a connected system for a real estate agency on Koh Samui.
Independent product developmentAvailable for new projects
From an idea
to a product
that works.
I design and build web services, apps and automation. Personally involved from the first decisions to launch.
Selected work / 2026
Behind every screen,
a problem solved.
From business tools to game worlds. Four different challenges, one approach: build a working product.
What are you exploring?
Explore the case
Contora02 / 04
AI · content platform
From a news feed to a publishable story.
Source aggregation, deduplication, translation and publishing in one workflow.
LoreCraft03 / 04
AI · games and apps
Worlds where the story responds to you.
A game platform with an AI game master, shared adventures and multiple game modes.
SnapArea04 / 04
macOS · utility
A screenshot. Just the tools you need.
Capture an area, annotate it, copy or save. A native macOS utility.
There is more. Explore websites, services, bots and individual tools in the archive.
All work 41Interactive playground
Better experienced
than explained.
Small demos of product workflows. Change the inputs and see what happens.
JJRent / AutomationNo inquiry lost
No inquiry lost
between tools.
Choose a vehicle and take a sample inquiry through the website, CRM and Telegram.
Uses fictional data. No actual booking is created.
01
WebsiteCustomer chooses a vehicle
Ready to submit
02
CRMBooking in the shared database
Awaiting inquiry
03
TelegramThe manager gets the details
Awaiting event
Run the workflow to see how the steps connect.
Contora / Content workflowOne story.
One story.
Three editorial directions.
Choose a story and a format. See how the prepared publication changes.
Fictional stories and prepared variations. An interface demo without live AI calls.
Source
Prepared post
TropicVibe / Search and filtersLess searching.
Less searching.
Closer to the right place.
Set your budget and bedroom count. The selection updates immediately.
Sample listings. Properties and prices are fictional, not rental offers.
Where I can help
Start with the problem.
Find the right solution.
01
Launch a product
From an idea and core flow to an interface and first working version. Websites, platforms, mobile and desktop apps.
02Automate the routine
Connect your website, CRM and messaging. Automate documents, notifications and data processing.
03Build what comes next
Extend an existing service, integrate AI or design a custom tool around your needs.
A small website with content ready can have a first version from 2 days. Scope and timelines for larger products follow a project review.
Personally involved
One conversation.
The whole picture.
I’m Sergei. Since 2010, I’ve worked across development, product and business, from fullstack engineering to technical leadership and product management.
My background connects advertising platforms, analytics and products of my own. You work with the person making technical decisions and writing code. I bring in specialists when a project needs them.
Sergei AntonovProduct Lead / Fullstack Developer
01Understand
Define what should change, who the product is for and how to evaluate the outcome.
02Build the core
Agree on the first version. Review working flows as development progresses.
03Launch
Connect the required services, check the key journeys and prepare for real use.
04Iterate
Gather feedback and choose the next changes based on their value to the product.
Before we start
Good questions.
What does a project cost?
End-to-end projects start at $1,000. After a review, I propose scope, phases and an estimate. We agree on the cost of each phase before starting.
Can we start without a specification?
Yes. Describe the current situation and the outcome you want. I’ll help identify the core journey and plan a first version.
What happens after launch?
We can continue with maintenance and product development. We agree on infrastructure, access handover and ongoing collaboration in advance.
Your next good product starts here
Have a project?
Let’s figure it out.
Bring an idea, a prototype or a process you have wanted to simplify.
Message on Telegram Build a brief
A short brief helps frame the conversation.
No commitment to start a project.