Hire the Best API Developers
in Turkey

I build and integrate backend APIs using C#, ASP.NET Core Web API, SQL, PostgreSQL, and REST-based services. I can help with third-party API integration, REST API development, backend bug fixes, database-connected endpoints, authentication-related tasks, Swagger/OpenAPI documentation, and API testing. My portfolio includes an ASP.NET Core Weather API Wrapper with external API integration, Redis caching, standardized error handling, Swagger documentation, and HTTP resilience policies such as retry, timeout, and circuit breaker. I also have an e-commerce API project using ASP.NET Core, Entity Framework Core, PostgreSQL, JWT authentication, and Docker Compose. Services I can help with: • ASP.NET Core Web API development • Third-party API integration • REST API design and implementation • SQL / PostgreSQL backend work • JWT authentication • Swagger / OpenAPI documentation • API testing and debugging • Backend maintenance and bug fixing I focus on readable code, practical implementation, and clear communication.

Senior .NET Developer with 20+ years of experience building, fixing, modernizing, and extending business applications using C#, ASP.NET Core, Blazor, SQL Server, Web API, WinForms, WebForms, Telerik, DevExpress, and .NET Framework. I specialize in complex .NET business systems: solving production bugs, improving performance, optimizing SQL Server databases, modernizing legacy .NET applications, and adding reliable new features without breaking existing workflows. Available for small bug fixes, legacy system maintenance, SQL performance tasks, API integrations, and long-term .NET development. What I can help you with: 🔹 .NET Backend & Web Development * C# development, .NET development, ASP.NET Core, ASP.NET MVC, Web API, and REST API * Backend development, API integration, third-party integrations, and business application development * Entity Framework, EF Core, LINQ, ADO.NET, repositories, migrations, and data access layers * Authentication, authorization, role-based access, and secure business workflows 🔹 Blazor & Modern Web Applications * Blazor Server, Blazor WebAssembly, Blazor WASM, Blazor PWA, and Razor components * Business dashboards, admin panels, internal tools, reporting interfaces, and workflow systems * Telerik UI for Blazor, Telerik Reporting, TRDX reports, and custom reporting solutions 🔹 SQL Server & Database Performance * SQL Server development, database design, T-SQL, stored procedures, views, triggers, and functions * Query optimization, indexing, performance tuning, slow report troubleshooting, and database refactoring * Data migration, database cleanup, reporting databases, and business data structures 🔹 Legacy .NET Modernization * ASP.NET WebForms, ASPX applications, .NET Framework applications, WinForms, and WPF * Legacy application maintenance, bug fixing, refactoring, and safe modernization * Migration from older .NET Framework systems to modern .NET, ASP.NET Core, Blazor, or API-based architecture * DevExpress WinForms, Telerik components, desktop UI modernization, and reporting system upgrades 🔹 Automation, Integration & AI * OpenAI API, ChatGPT API, AI integration, chatbot features, and AI-powered business tools * Web scraping, Puppeteer automation, browser automation, API scraping, and data extraction * RabbitMQ, background services, Windows Services, scheduled jobs, CQRS, modular systems, and workflow automation I have hands-on experience with accounting software, sales systems, warehouse and inventory systems, treasury systems, CRM, ERP-style applications, healthcare systems, reporting platforms, admin panels, dashboards, and other database-driven business applications. Why clients work with me: ✅ 20+ years of practical software development experience ✅ Strong debugging and root-cause analysis skills ✅ Experience with both modern .NET and legacy .NET Framework systems ✅ Ability to understand large existing codebases and improve them safely ✅ Strong SQL Server, reporting, backend, and business application experience ✅ Clean, maintainable, stable, and performance-focused solutions ✅ Focus on reliability, long-term maintainability, and real business needs Typical projects I can support: * Build a new ASP.NET Core, Blazor, or Web API application * Fix bugs in an existing .NET, WebForms, WinForms, WPF, or SQL Server system * Modernize legacy .NET Framework applications * Improve SQL Server performance and slow reports * Add new modules to accounting, inventory, CRM, ERP, or internal business systems * Integrate third-party APIs, payment services, AI tools, or automation workflows * Maintain and extend long-running business applications safely Core technologies: C#, .NET, .NET Core, .NET Framework, ASP.NET Core, ASP.NET MVC, ASP.NET Web API, Web API, REST API, Blazor, Blazor Server, Blazor WebAssembly, Blazor WASM, PWA, WinForms, Windows Forms, WPF, WebForms, ASPX, Entity Framework, EF Core, ADO.NET, LINQ, SQL Server, T-SQL, Stored Procedures, SQL optimization, Telerik, Telerik UI for Blazor, Telerik Reporting, DevExpress, DevExpress WinForms, RabbitMQ, CQRS, Windows Services, background services, Puppeteer, browser automation, web scraping, API integration, OpenAI API, ChatGPT API, and AI integration. If you need a senior .NET developer, C# developer, ASP.NET Core developer, backend developer, Blazor developer, SQL Server developer, desktop application developer, Web API developer, Telerik developer, DevExpress developer, web scraping developer, or legacy application modernization specialist, I can help you build, fix, optimize, or modernize your application.

I'm a Master of Science student in Bilkent University / Turkey in Computer Science department. ✅ React, Typescript ⭐ Created frontend applications ✅ Python ⭐ Created custom Chatbot using Deep Learning models. ⭐ Created web scraping automations using Selenium. ⭐ Created backend applications using Django & Flask Frameworks. ⭐ Fetched data from external APIs. Updated data in 3rd party applications such as Hubspot. ✅ Google Apps Script, JavaScript ⭐ Created Web Applications using HTMLService. Connected web applications to third party softwares & APIs like OpenAI GPT. ⭐ Used SpreadsheetApp to automate Google Sheets, fetch external data using several APIs such as Fedex, Coingecko, Aves. ⭐ Published 2 public - 2 private Add-ons for Google Sheets. ⭐ Used GmailApp to automate sending Emails. Generated quality Email content with HTML & CSS. ⭐ Used SlideApp to populate Google Slides from Google Sheets. Used DriveApp to convert them into PDF and store in Google Drive. ⭐ Used Form App to automate Google Forms such as editing, deleting, adding form questions. ✅ Google Cloud ⭐ Deployed web applicatons, selenium applications and trained machine learning models to Google Cloud.

🕺For the last 4 years, I have had the opportunity to work with all major libraries in Python. I have worked with API development, scraped various websites, developed many bots and manipulate data. I support on many startups, personal projects. I enjoy my work and desire to support people with my coding skill. I want to use all this skills and knowledge for you now. 📌 What can i use while developing your project? ➡️In API Development ✅Django ✅Flask ✅FastAPI ✅ORM's ✅Pydantic ✅JWT Token ✅Documentation ➡️In Web Scraping ✅Requests, Aiohttp ✅Scrapy ✅Selenium ✅Playwright ✅Proxy pools, custom headers ➡️In Database ✅MongoDB ✅SQL (MySQL, MsSQL, SQLite) ✅JSON, CSV ➡️In Data Science ✅Pandas ✅NumPY ✅Sklearn ✅Matplotlib, Seaborn ➡️In Bot Development ✅Discord.py ✅Social Media Bots 🎯Highlighted Projects 💠More than 200.000 products were scraped from e-commerce website 💠Built scraper that scans data from various domain and SEO analyzer. (More than 15 providers) 💠Customized Discord Bot for YouTuber (DaviddTech, Bitikoglu) (More than 13.000 Members) 💠Tinder user automation ❓Most Asked Questions 🟢Cab you create trading strategies? YES 🟢Can you scrape data from JS rendered webpages? YES 🟢Can you scrape Amazon? YES 🟢Can you create API which is scraper? YES 🟢Will you share source code? YES 🟢Can you provide scraped data custom formats (csv, json, txt, database)? YES 🔴Can you create bot for Tinder? Unfortunately No, because my old clients made me hate Tinder. 🟠Feel free to DM me.