I built YourLastDev after solving the same problem in my own projects

Hi, I am Sergiy

Sergiy Yashchenko

Founder of YourLastDev · Product Owner / CEO / Product Manager · Ukraine

I am an IT entrepreneur with more than twenty years of building products. I have been a product owner, a product manager and a CEO, and I have worked with many development teams — in-house, outsourced and freelance. My background is product and business: deciding what to build, what to cut, and what a product has to do for the business behind it.

Twenty years of my own products

My first horse-related web project went live in 2006. Over the years it grew into several equestrian ventures — a news portal, a forum, a magazine, a tack shop and a horse agent service — and eventually into HorSense Innovations, a company building online tools for the equestrian world. Alongside that I work on Streamster, free live-streaming software with cloud multistreaming, on the web and on mobile.

The problem I kept running into

Running this many products taught me something uncomfortable: owning a product and being able to change it are two different things. Again and again I ran into the same problems:

• Every small change meant a ticket, a wait and another invoice.
• Good ideas stayed on the shelf because there was no development budget for them.
• When a developer or a team left, the knowledge of how the product worked left with them.
• Much of the budget went into keeping things alive rather than making them better.
• I owned the products, but I could not change a thing in them myself.

I assumed that was simply the price of having software. It turned out it no longer has to be.

What changed when I moved my projects to AI

When AI coding assistants became genuinely capable, I started moving my own projects to AI-assisted work — first carefully, then completely. Today I build and maintain my products with Claude Code. horses.sale and move.horse are built and run this way: multilingual, with payments and user accounts, live in production.

The difference is not only speed. Changes that used to wait for a developer now happen the same day. I understand my products again, because I can ask about any part of them and get a straight answer. And the dependency is gone: the products are simpler, their accounts are in our name, and they no longer belong to whoever happened to write the code.

Why I share it

Most business owners I talk to are exactly where I was: paying to keep a product alive that they cannot change themselves. The tools that got me out of that are available to everyone — what is missing is someone to set things up properly and show you how to use them on your own product.

So that is what YourLastDev does. I analyze your business, design the architecture and build the foundation — the part that really needs experience — and then teach you to build the rest yourself with AI. The goal is unusual for a developer: to make myself unnecessary for everyday work, while staying by your side when you need help. That is also why the prices are fixed — the business is built on doing a project well once, not on keeping you dependent.

The same works beyond a single owner. In any company, the people who know the work best — marketing, sales, operations — are the ones who know which tools they are missing. With a solid foundation and some training, they can build those tools themselves instead of waiting in a developer backlog. That is why YourLastDev has plans for teams and larger companies, not only for solo founders.

What I bring to your project

• Twenty years of product decisions — knowing what to build, and just as importantly, what to leave out.
• Experience with many development teams, and a clear view of where software projects usually go wrong.
• Daily, hands-on AI-assisted development on my own live products — not theory.
• A business owner's perspective: every decision is weighed against what it costs you and what it earns you.
• Personal training: I train every client myself, on their own product.