Cantürk Çelikok
Freelance Full Stack Developer · Ankara, Türkiye

I turn your idea into a product people use every day

From desktop apps to business SaaS dashboards, from restaurant digitalisation to POS systems, I've built live products in four different industries. Your idea is next.

plusturk.com
PlusTurk call centre and collections dashboard
ayda · kasa
Ayda restaurant POS system

6+

Years of experience

4

Live products

4

Industries

8+

Third-party integrations

Services

Software shaped around your business goals

No project is a template. Each one is a sustainable system built around what you actually need.

See all services

SaaS and Subscription Platforms

Multi-user cloud platforms with role-based permissions. I build them end to end, with payments, SMS and reporting.

Desktop and Cross-Platform Apps

Desktop software for Windows and macOS that's easy to install and sustainable to maintain.

Restaurant and Retail Digitalisation

POS systems that bring the till, the kitchen display and online orders together in one system.

Selected Work

Four industries, four live products

Each one runs with real users, and I built every one of them end to end.

All projects
Desktop App

Nerdesin: Location Changer App

A Windows app that changes an iPhone's location from a computer, with no jailbreak needed.

Outcome

Live as a desktop product you can try for free within five minutes of installing, with no account or jailbreak needed. Compatible with iOS 16 and later.

ElectronTypeScriptNode.jsWebSocketMaps API
SaaS Platform

PlusTurk: Call Centre and Payments Platform

A calls, debt collection, online payments and SMS platform for law firms, healthcare providers and survey companies.

Outcome

It's used live by law firms, healthcare providers and survey companies, each with industry-specific screens. An end-to-end flow sends the debtor a payment link by SMS, closes the case automatically once payment arrives, and produces a signed 'no debt' letter.

Next.jsTypeScriptPostgreSQLRedisiyzicoPayTRStripe
Bundle discounts as you add features

Know your project budget without waiting for a quote

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Recent work on live systems
20 Oct 2026

Cut kitchen display sync latency in Ayda POS to under 400ms

10 Oct 2026

Added Nestpay virtual POS support and the 3D Secure flow to PlusTurk

28 Sept 2026

Added natural GPS drift (jitter) simulation to Nerdesin

14 Sept 2026

Integrated the kids' area booking form into the Songnaria Coffee site

30 Aug 2026

Added Excel export to PlusTurk's reporting module

How we work

A step-by-step process with no guesswork

From idea to live system in four steps, and you always know what happens next.

01

Discovery call

I listen to your business goal, your users and your constraints. No jargon: we pin down the problem first.

02

Scope and quote

I put in writing what I will build, by when and for how much. No surprise invoices, no vague delivery dates.

03

Build with regular demos

I share progress every week; while you test one part, I build the next. Nothing happens behind closed doors.

04

Launch and support

I stay with you after go-live. Bug fixes and small improvements don't require hunting for a new team.

Got an idea? Let's talk first, then build it.

We start with a short, no-commitment call and work out what your project actually needs.