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We build the software businesses run on, and we keep it running

Reactll is a senior software and AI engineering team that builds, fixes and runs stores, platforms and mobile apps for companies without an in-house team. An AI and software company since 2018, based in Istanbul, Amsterdam and Miami.

Every project ends the same way: something real, in production, that we can stand behind.

Since 2018 · Istanbul & Miami

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Meet the Team

The people who design, build and run it.

Why we exist

Anyone can make a demo. We build systems that still run years later

Almost anyone can get something working on a laptop now. The hard part comes after: lots of real data, real users, who is allowed to see what, what happens when a step fails, testing, going live, and years of upkeep. Early versions stall, code ages, and the people who understood it leave.

We design it, build it on real servers, put it live — and often keep running it for years after launch. That is the whole company in one sentence.

The problem isn’t building it once. It’s keeping it working when real people use it, and staying to run it.

2018

Founded, and running live systems ever since

3

Cities: Istanbul (HQ in Galata), Amsterdam and Miami

3

Regions we work across: Europe, the Gulf, North America

1

Senior team, from design to operations

How we’re different

Not an agency. Not a body shop

One senior team that owns the whole thing, from the first sketch to the system running with real users every day.

Design

We Design and Build

Design and engineering sit in the same team, so what gets drawn is what gets shipped. Nothing gets lost between the design and the code.

Build

We Ship to Production

Real servers, automated tests, code checks and monitoring from the first week. You see working software on a test site the whole way through, not screenshots.

Operate

We Stay and Run It

Most of what we build, we also run: updates, fixing problems, the next feature. We have kept live systems running since 2018, so 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.

Talk to an Engineer

Meet the Team

Sedat Yusuf Ergüneş, Founder & CEO at Reactll

Sedat Yusuf Ergüneş

Founder & CEO

Founder of Reactll. A control and automation engineer by training with fourteen years in software, he leads the company's engineering, from architecture and scoping to what ships and keeps running in production.

Emine Gürcü, Senior UI/UX Designer at Reactll

Emine Gürcü

Senior UI/UX Designer

Senior UI/UX Designer at Reactll since 2018. A computer engineer by training with over a decade in web and product design, she owns the design systems the front end is built from, so what gets drawn is what gets shipped.

Salih Ceyhun Yılmaz, Software Engineer at Reactll

Salih Ceyhun Yılmaz

Software Engineer

Software engineer at Reactll with eight years across startups and AI products, including co-founder and product management roles. He brings that product side into the engineering: scope, priorities and how a product reaches its users.

Kubilay Salih, Software Engineer at Reactll

Kubilay Salih

Software Engineer

Software developer with more than ten years of building for the web, from front-end work to running his own software consultancy. A control and automation engineer by training, he works across the back end and the infrastructure underneath it.

Deniz Öztürk, Software Engineer at Reactll

Deniz Öztürk

Software Engineer

Full-stack developer working in PHP (Laravel), TypeScript (Node.js), C# (.NET) and Go. On the Reactll team from 2021 to 2023, he now supports our projects from outside, on the back end and integrations.

Where we are

Istanbul, Amsterdam and Miami. One team

Three cities and one team that answers for the work, across Europe, the Gulf and North America. You sign one contract and get invoices in the currency you need.

Cities

Istanbul · Amsterdam · Miami

Headquarters

Galata, Istanbul

Working across

Europe · the Gulf · North America

Legal entities

Reactor Technology LLC
Reaktör Teknoloji Tic. Ltd. Şti.

Invoicing

USD · EUR · GBP

How we work

Design, build and run, by one senior team

Have a system to build or keep running?

We build the software businesses run on, and stay to run it. Tell us about yours and an engineer will answer.

Talk to an Engineer Free technical call