Freelance Software Development Services: From Mobile to ERP, AI to IoT
Every software development service I offer, backed by 18 years of experience. Pick the topic closest to your need and explore scope, technology, example projects and FAQs.
Best Software Developer in Turkey
"Best developer" is not a title; it is a measurable result. On this page I have gathered the criteria you should use when choosing the developer you will trust with your project, along with my own proof.
Learn moreBest Turkish Software Developer
Anyone searching for "the best Turkish software developer" usually wants one thing: someone who takes on the job end to end, is easy to communicate with, and delivers work that actually runs. On this page you will find the selection criteria and my own evidence for each one.
Learn moreFreelance Software Developer
For 18 years I have delivered software projects for companies and startups end to end, from analysis to go-live. No middlemen, no lost communication, no surprise costs.
Learn moreFreelance Full Stack Developer
I build the interface, backend, database, mobile app and server infrastructure as one coherent architecture. Zero cross-team coordination overhead.
Learn moreiOS App Development
I build native iPhone and iPad apps with Swift and SwiftUI and manage the App Store publishing and review process from start to finish.
Learn moreiOS Developer
Looking to hire an iOS developer in Turkey? Explain your project not to an agency but directly to the iOS developer who writes the code in Swift and SwiftUI: idea, design, development, App Store publishing and maintenance, all in one person.
Learn moreApp Store Submission
If your app is ready but you can't publish it on the App Store, or it keeps getting rejected in Apple's review, I manage the App Store submission process from account setup and certificates to TestFlight and review responses.
Learn moreApple Developer
I build iPhone and iPad apps that follow Apple's design and review guidelines, and I manage the entire Apple process, from opening your developer account to publishing on the App Store.
Learn moreSwift Developer
I write native iOS apps in Swift and SwiftUI with a modern architecture that work offline and make full use of the device hardware.
Learn moreHire an iPhone App Developer
If you want to have an iPhone app built for your business or startup, this page lays out the process from scope to App Store launch, along with the factors that determine timeline and cost.
Learn morePhone App Developer
If you're thinking "I want an app built for phones but I don't know where to start," you're in the right place. No technical knowledge needed; just tell me what you want and I'll handle the rest.
Learn moreLooking for a Developer
If you're looking for a software developer to build an app, a business program or a website, the wrong choice costs you time and money. Here's what to ask before you decide who builds it — or let's just talk now.
Learn moreSoftware Developer for Turkish Businesses in Germany
If you run a restaurant, grocery store, phone shop, travel agency or manufacturing business in Germany, plan your app, website and business software in Turkish and offer it to your customers in German and Turkish.
Learn moreApp Development Companies
If you're looking for a company to build your mobile app, here's what to watch for when comparing quotes, and how we'd move forward if you work with me.
Learn moreAndroid App Development
I build high-performance Android apps in Kotlin for phones, tablets and industrial handheld terminals.
Learn moreECDIS Training Simulator
NSİ ECDIS is a Turkish-made training simulator I developed so that Electronic Chart Display and Information System (ECDIS) training can be delivered without depending on costly foreign licenses.
Learn moreiPhone Spyware Detection App
A security scanning app I built specifically for Apple phones: with a single tap it instantly scans your iPhone for hidden tracking apps, traces of state-grade spyware and jailbreak tools.
Learn morePhone Tracking App
Some people searching for a “phone tracking app” want to know whether their own phone is being monitored, while others want to track their child or company devices legally. On this page I explain both sides from a technical perspective.
Learn moreIs My Partner Tracking My Phone?
If you suspect your phone is being monitored by your partner or someone else, you are not alone. Tracking is usually done not with complex spyware but with settings left on and shared accounts; the good news is that you can check most of it yourself.
Learn moreIs Someone Reading My WhatsApp?
WhatsApp messages are end-to-end encrypted; so if someone is reading your messages, they usually do it not by breaking the encryption but through a device linked to your account or through your backup. You can check and close these routes one by one.
Learn moreCan My Partner See My Location?
Location tracking is the most common monitoring method, and it often doesn't even need an app: a sharing setting left on, a known password or a small tracking device slipped into a bag is enough.
Learn moreAndroid Spyware Detection
On Android, tracking apps are usually installed with a few minutes of physical access to the phone and take broad permissions to hide themselves. By checking these permissions you can find most tracking apps yourself.
Learn moreMobile App Development
I turn your idea into a product that runs on the App Store and Google Play, including the API and admin panel behind the app.
Learn moreMobile App Developer
If you are looking for a mobile app developer and want to talk to the person who will actually write your app rather than an agency sales rep, you are in the right place. I handle iOS, Android, backend and store publishing as a single developer.
Learn moreEnterprise Mobile App Development
If your field team still fills out paper forms, warehouse counts are merged in Excel and records reach the office days later, I build enterprise mobile apps that work offline, take just a few taps and send data straight to your ERP.
Learn moreSaaS Mobile App Ideas
SaaS ideas that bring in subscription revenue every month instead of a one-off app sale, covering who each one is for, why customers pay and how to ship the first version (MVP).
Learn moreAppointment and Booking App
I build apps for hair salons, clinics, beauty centers, consultants, gyms, restaurants and field services where customers see available slots and book themselves, while reminders and payments run automatically.
Learn moreField Sales and Courier Tracking App
A mobile app and management system that tracks the live location, visits, orders and deliveries of sales reps, field representatives, service technicians and couriers from a single panel.
Learn moreE-Commerce Mobile App Integration
Without disrupting your existing e-commerce site, I build mobile apps that share products, stock, cart, accounts and orders through a common API and are published under your brand on iOS and Android.
Learn moreAI-Powered Mobile App
I build iOS and Android apps that perform visual inspection and recognition with the phone camera, analyze photos, offer chat and assistants powered by language models, and make predictions from data; when needed, the model runs on-device without internet.
Learn moreWeb Application Development
Where off-the-shelf packages fall short, I build web software and SaaS platforms that fit your workflow exactly.
Learn moreCustom Business Software
If off-the-shelf software doesn't fit your business and you want to bring everything you track in Excel and notebooks into one program, I'll design and build custom software for your business with you.
Learn moreWebsite Development
A website isn't just a storefront; it needs to be found on Google, load fast on phones and drive visitors to call, message on WhatsApp or place an order. That's the goal I build every site around.
Learn moreLaravel & PHP Developer
For years I have been building production systems with Laravel, CodeIgniter and framework-free PHP/PDO MVC architectures.
Learn moreERP / MRP Software
I bring your production planning, inventory, warehouse and purchasing processes together in an ERP/MRP system built for your company, integrated with SAP and Netsis.
Learn moreProduction Tracking Software
Off-the-shelf production software stops at BOM and stock; it does not show which workstation a work order is waiting at, how much scrap was produced or what the product really cost. I build production tracking software with work order and BOM tracking, set up around your factory's flow and tracked at each workstation by QR code.
Learn moreManufacturing Automation Software Developer
If machines live in PLCs, orders in the ERP and reports in Excel, the person who builds the bridge between them is the automation software developer. As a manufacturing automation software developer, I deliver PLC communication, robot and conveyor software, operator screens and the transfer of production data to your ERP from a single source.
Learn moreOEE Tracking Software
A machine appears to be running, yet the target is missed at the end of the day: short stops, slow cycles and defective products are hidden losses. OEE tracking software turns these losses into numbers for machine efficiency monitoring.
Learn moreFurniture ERP Software
Order intake, production planning, stock tracking, HR, customer accounts, invoicing and e-invoice integration — on a single platform designed for furniture manufacturers.
Learn moreFurniture Production Tracking Software
Production tracking software built for furniture factories that follows every order from cutting to assembly and from packing to shipping in real time, using job travelers and QR scanning.
Learn moreFurniture Dealer Ordering Software
A B2B dealer portal for furniture manufacturers where dealers place orders based on their own price list, track order status, and orders go straight into production.
Learn moreSAP Consulting
I provide process consulting to companies running SAP Business One and S/4HANA, and build two-way integrations between SAP and e-commerce, mobile field, production and reporting applications.
Learn moreB2B Dealer Ordering Portal
I move dealer orders that run on phone calls, email and Excel into a B2B portal that works with dealer-specific pricing, credit limits and stock data.
Learn morePharmaceutical Warehouse Automation
With Mandalin Pharmaceutical Warehouse Automation, pharmacies place B2B orders from your stock using their own username and password, while warehouses, branches, stock, expiry dates, transfers, returns, invoices and reports are managed in a single system.
Learn morePharmacy B2B Ordering System
I build systems that open a pharmaceutical wholesaler's stock to pharmacies through a password-protected B2B portal, offer pharmacy-specific pricing, account balances and order tracking, and send orders straight into the warehouse automation.
Learn moreWarehouse Stock Tracking Software
With Genesis Stok Satış Şube Takip, every inbound and outbound movement in your warehouse is recorded by barcode; transfers between warehouses and branches, stock counts, purchasing and reports can be followed even from your phone.
Learn morePhone Inspection & Repair Software
I built MobilEksper for phone stores, repair shops and used-device traders: a single panel that manages the entire process, from inspection to repair and from stock to sales.
Learn moreMobile POS & Inventory
I build sales, restaurant ordering and inventory systems that run on phones and tablets for grocery stores, kiosks, restaurants and retail shops.
Learn moreKassa iPhone POS App
Kassa, which I built for grocery stores, kiosks, markets and small shop owners, turns your iPhone into a cash register with a barcode scanner, and your pocket into an inventory and store-credit ledger.
Learn moreBarcode POS Software
I develop barcode POS software that sells in seconds by scanning the product barcode, deducts stock on every sale and shows your profit at the end of the day, from the ready-made iPhone app Kassa to custom multi-branch systems.
Learn moreGrocery Store Software
I develop grocery store POS software for corner shops, markets and delis: barcode sales at the till, stock and expiry tracking on the shelf, and the paper store credit ledger moved to digital.
Learn moreKiosk POS App
A kiosk POS app that sells by scanning barcodes with a phone, built for kiosks, convenience kiosks and tobacco shops whose tight counters leave no room for a computer, till or cables.
Learn moreQuick Sale POS
I develop quick sale POS software that sells items without barcodes, such as simit, tea, pastries and coffee, with a single button on a touchscreen and clears queues at peak hours.
Learn moreCanteen POS Software
I develop canteen POS software for school, factory and dormitory canteens that make hundreds of sales in a few minutes during breaks, with a quick-sale screen and prepaid card payments.
Learn moreClothing Store POS Software
I wrote this program for boutiques and clothing stores; it brings all store operations into a single panel, from barcode sales at the checkout to transfers between branches, from stock alerts to monthly sales reports. It is used in Büyük Beden Giyim stores.
Learn moreAI Integration
I integrate AI not as a demo, but as a module that delivers measurable results on the production line, in the store and in customer service.
Learn more3D Aesthetic Simulation
FaceMorph AI is a 3D face analysis and simulation station I developed for aesthetic clinics and specialists: the client's face is scanned and measured, the post-treatment look is simulated in 3D, and the before and after is shared in a report.
Learn moreAesthetic Surgery Software
I develop software for aesthetic surgery and medical aesthetic clinics that brings patient records, standardized photos, 3D simulation, measurement and reporting into one system, from the first consultation to the post-operative check-up.
Learn moreBioresonance Software
I develop software for bioresonance and frequency device manufacturers and for the centers that use these devices: it controls the device from a computer or tablet and keeps frequency programs, client records and session history in one place.
Learn moreVending Machine Software
I develop every software layer of a vending machine with a single architecture — from the control board and touchscreen to the cloud management panel and the field team's mobile app.
Learn morePPE Vending Machine Software
I develop PPE vending machine software that replaces manual handout of gloves, safety glasses, masks and earplugs from the storeroom: employees scan their card, take only what they are entitled to, and every withdrawal is recorded.
Learn morePPE Tracking and Issuance Software
I develop PPE tracking software that answers the first question in any safety audit, “was this employee issued PPE?”, on a single screen with supporting documents, instead of digging through Excel sheets and paper files.
Learn moreİSG Sanal Depo Asistanı
A field solution for manufacturing plants and industrial operations that digitizes personal protective equipment (PPE) management end to end, from card scan to ERP record.
Learn moreIndustrial Automation Software
I write automation software that lets you monitor and control your factory's PLCs, conveyors, robots and machines from a computer and keeps a record of production.
Learn moreElectronic Product Development
Not just software: I develop production-ready products where the circuit board, embedded firmware, mobile app and cloud dashboard work together.
Learn moreEmbedded Software & IoT
I develop every layer of an IoT project in-house, from microcontroller firmware to the web management panel.
Learn moreCNC WiFi DNC Box
It plugs into your CNC machine's USB port once and stays there. You send G-code files over WiFi from the office computer, a phone or a tablet; the machine sees the file as if a USB stick were plugged in.
Learn moreE-Commerce Development
I build an e-commerce site that is entirely yours, with a product structure tailored to your industry plus payment, shipping and marketplace integrations.
Learn moreFurniture E-Commerce Website
A furniture e-commerce website is not like standard online retail: the same product is made in dozens of sizes, fabrics and colors, and customers often buy a complete set rather than a single item. This online furniture store software was built from scratch for exactly that need.
Learn moreOrder & Shipping Panel
For businesses selling on Instagram, WhatsApp or marketplaces without a website, I built a system that brings orders into one panel, sends them to the carrier in bulk, prints barcode labels and tracks delivery.
Learn moreFlight Booking Website
I build flight booking websites for travel agencies and startups that handle everything from flight search to 3D Secure payment, and from ticketing to refunds and PNR lookup. A live example is ucakbiletcisi.com.
Learn moreAPI Integration
I turn manual data transfers between different software into automated, error-free and traceable integrations.
Learn moreCrypto Exchange Software
For startups and financial companies that want to launch their own crypto exchange, I develop the entire exchange software in-house, from the order matching engine and wallet infrastructure to the KYC/AML flow and mobile app.
Learn moreCrypto Exchange API Integration
I connect your app, trading platform or business system to crypto exchanges: real-time prices, orders, balances and automated trading on a single infrastructure.
Learn moreBinance Bot Developer
Instead of watching the screen all day, I build crypto trading bots that turn your buy and sell rules into code, test them on historical data and execute them with discipline through the Binance API.
Learn moreStock Trading Software Developer
I develop analysis platforms with live charts, signal and portfolio tracking systems, membership-based trader communities and automated trading infrastructure for Borsa Istanbul and crypto markets.
Learn moreForex Software Developer
Instead of executing your forex strategy manually, I turn it into a MetaTrader Expert Advisor and indicator, a signal and copy trading infrastructure, or a custom trading system running on a broker API.
Learn moreBlockchain & Crypto Exchange Developer
I build API integrations with crypto exchanges, automated trading infrastructure, live trading platforms and apps connected to Web3 wallets and smart contracts.
Learn moreSEO Expert
I do technical SEO from a developer's perspective, optimizing your site's infrastructure, content and structured data for Google and AI search engines.
Learn moreGEO Consulting
People no longer ask their questions only on Google but also on ChatGPT, Gemini and Perplexity, and Google itself shows AI summaries above the results. GEO consulting (generative engine optimization) aims to have your brand and pages cited as sources in these answers.
Learn moreSocial Media Manager
For a monthly fee, I manage your business's social media accounts with planned, consistent, on-brand content, and bring social media together with your website, Google Business Profile and SEO in a single strategy.
Learn moreInstagram Account Management
I manage your Instagram account consistently with a content calendar, on-brand posts, Reels and stories, and route the interest it generates to your WhatsApp, website and store.
Learn moreGoogle Business Profile Management
I manage your Google Business Profile with the right categories, services, photos, regular posts and review replies, and align your website with the profile for local SEO.
Learn moreLocal services
Software Developer in Istanbul
I build mobile apps, web software and ERP projects for startups, e-commerce companies and enterprises in Istanbul, working on site during the analysis and installation phases.
Learn moreIzmir Software Developer
I build ERP, quality control, IoT, mobile and web software for manufacturers, retailers and service businesses in Izmir, after seeing the process firsthand on site.
Learn moreSoftware Developer Ankara
I develop ERP integration, occupational safety, staff attendance and mobile app projects for enterprises, industrial companies and technopark firms in Ankara.
Learn moreSoftware Developer in Bursa
I develop software that digitizes production, quality, dealer and sales processes for automotive supplier, textile and Inegol furniture companies in Bursa.
Learn moreSoftware Developer Antalya
I build multilingual software that holds up under peak-season load for hotels, travel agencies, restaurants, health tourism clinics and greenhouse operations in Antalya.
Learn moreiOS App Development Istanbul
I build native iPhone apps in Swift/SwiftUI for startups, e-commerce brands and enterprises in Istanbul, and manage the process all the way to the App Store.
Learn moreiOS App Developer in Izmir
I build iPhone apps for manufacturers, exporters, tourism and healthcare businesses in Izmir, handling analysis and installation on site.
Learn moreiOS App Development Ankara
I build security- and access-control-focused iPhone apps for enterprises, technopark companies, and education and healthcare organizations in Ankara.
Learn moreiOS App Developer Bursa
I develop field, dealer ordering and product catalog iPhone apps for automotive, textile and İnegöl furniture companies in Bursa.
Learn moreiOS App Developer in Antalya
I develop iPhone apps for hotels, restaurants, travel agencies and medical tourism clinics in Antalya that international guests can use in their own language.
Learn moreIzmir E-Commerce Website
I provide e-commerce website development in Izmir for manufacturers, stores and brands, with payment, shipping and marketplace integration and SEO built in; analysis and setup meetings are held face to face in Izmir.
Learn moreIstanbul E-Commerce Website
I provide e-commerce website development in Istanbul for brands, wholesalers and stores: sites with marketplace, shipping and payment integration, built to compete on Google.
Learn moreAnkara E-Commerce Website
I provide e-commerce website development in Ankara for manufacturers, stores and corporate suppliers: sites that manage retail and B2B sales together, with payment and shipping integration.
Learn moreBursa E-Commerce Website
I provide e-commerce website development in Bursa and İnegöl for furniture, home textile and ready-to-wear manufacturers: sites tailored to their product structure, with payment and shipping integration.
Learn moreAntalya E-Commerce Website
I provide e-commerce website development in Antalya for manufacturers, stores and tourism businesses: multilingual sites with payment and shipping integration, ready for domestic and international sales.
Learn moreMobile App Development Istanbul
I build iOS and Android apps together with the backend and admin panel for startups, e-commerce brands and enterprises in Istanbul; discovery and setup meetings take place on site in Istanbul.
Learn moreMobile App Development Izmir
Because I am based in Izmir, I hold discovery, design approval and training meetings face to face with companies in Izmir, and build iOS and Android apps together with the backend and admin panel.
Learn moreSEO Expert Izmir
As an Izmir-based developer and SEO expert, I rebuild the websites of businesses in Izmir for speed, mobile-friendliness and structured data, and make them visible in local search and AI answers.
Learn moreSEO Expert Istanbul
Ranking in Istanbul's most competitive sectors takes more than blogging; technical infrastructure, content architecture and e-commerce SEO must be planned together. As an SEO expert in Istanbul, I deliver all of this together with web development from a single source.
Learn moreAI Integration Istanbul
AI integration in Istanbul: I integrate language model assistants, internal document search (RAG) and computer vision solutions into the existing systems of e-commerce, retail, finance and service companies in Istanbul.
Learn moreAI Integration Izmir
AI integration in Izmir: being based in Izmir, I review the processes of local manufacturing, logistics and service companies on site and integrate computer vision, language model and RAG solutions into their existing systems.
Learn moreAI Integration Bursa
AI integration in Bursa: for automotive suppliers, textile and İnegöl furniture manufacturers, I integrate camera-based quality control, production data forecasting and in-house assistant solutions into production systems.
Learn moreAI Integration Ankara
AI integration in Ankara: for enterprises and large organizations in Ankara, I build language model and RAG solutions that run on the company server without data leaving it, as well as license plate recognition and computer vision systems.
Learn moreIstanbul Bioresonance Software
I develop software for bioresonance centers and frequency device companies in Istanbul that controls the device, keeps client and session records and monitors multiple branches from a single panel.
Learn moreIzmir Bioresonance Software
As I am based in Izmir, I handle the entire process on site for bioresonance centers and frequency device manufacturers in Izmir, from device firmware to desktop and tablet software.
Learn moreAnkara Bioresonance Software
I develop software for bioresonance centers in Ankara that controls the device, stores client data in compliance with KVKK (the Turkish Personal Data Protection Law), and keeps staff permissions and an audit log.
Learn moreBursa Bioresonance Software
I develop software for bioresonance centers in Bursa that controls the device from a computer or tablet and brings client records, appointments and session history together on a single screen.
Learn moreAntalya Bioresonance Software
I develop software for bioresonance centers in Antalya that offers the interface and reports in Turkish, English, German and Russian, controls the device and keeps client and session records.
Learn moreInegol Furniture ERP Software
Furniture ERP software for Inegol furniture manufacturers that brings orders, production tracking, stock and shipping into one system, used live at a factory in Inegol OSB.
Learn moreIstanbul Aesthetic Simulation Software
FaceMorph AI setup for aesthetic surgery and medical aesthetic clinics in Istanbul: it analyzes the client's face in 3D during consultations, simulates the post-treatment look and generates a report.
Learn moreAntalya Aesthetic Simulation Software
FaceMorph AI setup for aesthetic and medical aesthetic clinics in Antalya, showing international clients the post-treatment look in 3D with a Russian, German and English interface.
Learn moreIzmir Aesthetic Simulation Software
As I am based in Izmir, I install FaceMorph AI on-site at aesthetic surgery and medical aesthetic clinics in Izmir, adapt the standard photo capture routine to each clinic and train the staff.
Learn moreAnkara Aesthetic Simulation Software
FaceMorph AI setup for aesthetic surgery and medical aesthetic clinics in Ankara, keeping patient photos and records on the device, protected by PIN lock and an activity log.
Learn moreIzmir Social Media Manager
Being based in Izmir, I meet Izmir businesses in person and manage their social media accounts, Google Business Profile and website together.
Learn moreIstanbul Social Media Manager
I manage social media accounts for brands, e-commerce sellers and B2B firms in Istanbul with a content calendar, a consistent brand voice and measurable reports.
Learn moreAnkara Social Media Manager
For corporate firms, consulting companies and local businesses in Ankara, I manage social media accounts, LinkedIn and Instagram first and foremost, with planned content.
Learn moreBursa Social Media Manager
I provide product-focused social media content and account management for manufacturers in Bursa, furniture makers in İnegöl, textile brands and local businesses.
Learn moreAntalya Social Media Manager
I provide social media content in Turkish and foreign languages, plus Google Business Profile management, for hotels, restaurants, tour and boat operators and health tourism businesses in Antalya.
Learn moreClients in Europe and the Gulf
Outsource Software Development to Turkey
For companies in Europe and the Gulf that need iOS & Android apps, web platforms, ERP modules or integrations built by an experienced engineer — without the overhead of an agency.
Learn moreFreelance Software Developer for Germany
Mobile apps, web platforms, ERP modules and integrations for businesses in Germany — built by a senior developer one to two hours ahead of Berlin.
Learn moreFreelance Software Developer for the Netherlands
A senior full stack and iOS developer for startups and SMEs in the Netherlands — working in English, one to two hours ahead of Amsterdam.
Learn moreFreelance Software Developer for the UK
iOS & Android apps, web platforms and system integrations for UK startups and SMEs — built by a senior developer working in English, two to three hours ahead of London.
Learn moreApp & Software Developer for the UAE
iOS & Android apps, web platforms, POS and ordering systems and integrations for companies in Dubai, Abu Dhabi and across the Emirates — delivered by a senior developer just one hour behind UAE time.
Learn moreApp & Software Developer for Saudi Arabia
Mobile apps, web platforms, ERP modules and integrations for companies in Riyadh, Jeddah, Dammam and across the Kingdom — from a senior developer in the same time zone.
Learn moreAgency, off-the-shelf package or freelance expert?
| Criteria | Software Agency | Off-the-shelf / SaaS | Hakan Sevimoğlu |
|---|---|---|---|
| Point of contact | Sales + project manager + team | Support line | The expert who writes the code |
| Cost structure | Office, sales and management layers are priced in | Per-user / monthly license, forever | Development work only |
| Fit to your business | Scope changes need extra contracts | ✕ You adapt to the package | ✓ Software adapts to you |
| Response time | Tickets, meetings, approval chains | Queued | ✓ Direct WhatsApp / phone |
| Technical depth | Depends on who is on the team | Limited customization | ✓ 18 years, every layer from mobile to IoT |
| Maintenance | Knowledge is lost when the team changes | Data risk if the product shuts down | ✓ Supported by the person who built it |
Free pre-analysisThe first meeting and roadmap are completely free, with no obligation.
Staged delivery and approvalYou review each module on a test environment before we move on.
Written scope and rightsScope, delivery and source code rights are defined in the contract.