Sedat Yusuf Ergüneş
Founder & CEO
Leads Reactll and its engineering — from architecture and scoping through to what actually ships and keeps running in production.
About Reactll
We build the software businesses run on — and we keep it running.
A production-first AI and software engineering company since 2018, from Istanbul and Miami. Design and engineering in one senior team, from the first commit to production and long after.
Why we exist
“Anyone can ship a demo. We ship systems that are still running years later.”
Almost anyone can get something working on a laptop now. The hard part is everything after — real data volumes, real users, permissions, retries, evaluation, deployment, and the years of keeping it alive. Prototypes stall, code rots, and the people who understood it move on. The problem isn't building it once. It's making it hold in production — and staying to run it.
Every project ends the same way: something real, in production, that we can stand behind. We design it, build it on real infrastructure, deploy it — and in most cases keep operating it long after launch. That is the whole company in one sentence.
How we’re different
Not an agency. Not a body shop.
One senior team that owns the whole thing — from the first drawing to the system running under real load.
We design and build
Design and engineering sit in the same team, so what gets drawn is what gets shipped — no lossy hand-off between a picture and the code.
We ship to production
Real infrastructure, tests, static analysis and monitoring from the first week. You see working software on staging throughout, not screenshots.
We stay and run it
Most of what we build, we also operate — updates, incidents, the next feature. A decade of production systems is why we can promise it.
The team
The people who build it.
Senior engineers and designers who ship the work themselves — and answer for it afterwards. No account managers, no layers between you and the people writing the code.
Get in Touch
Where we are
Istanbul and Miami. One team.
Two offices, one accountable team — working across Europe, the Gulf and North America, with a single contracting entity that invoices in the currency you need.
Founded in 2018
Istanbul & Miami · HQ in Galata
EU · Gulf · North America
Design → build → operate
Reactor Technology LLC
Reaktör Teknoloji Tic. Ltd. Şti.
Invoiced in USD · EUR · GBP
One senior team, end to end
