Hire the Best .NET Core Developers in Istanbul, TR

### **Senior Software Architect | AI Engineer | Full-Stack Developer | Fintech** I’m a **Senior Software Engineer, Architect, and Product Builder with 15+ years of professional software development experience**, specializing in complex backend systems, APIs, distributed architectures, fintech platforms, and AI-assisted software development. I don’t just write code. I help turn **business ideas, requirements, and complex operational problems into scalable software products** — from the first analysis and architecture decisions to development, deployment, monitoring, and production support. Throughout my career, I have worked across industries including **finance, banking, telecom, automotive, CRM, and fintech**, building and managing production systems used by real businesses and customers. Today, I’m the founder and lead developer of **TradeWize**, an online algorithmic trading and fintech platform that I designed and developed from the ground up. Building TradeWize required much more than developing a website. The platform includes multiple interconnected systems for: * Algorithmic and automated trading * Real-time financial market data * Portfolio and account management * Trading APIs and broker integrations * Web and mobile applications * Backtesting and financial analysis * Real-time calculations and data processing * Distributed backend services * Authentication and permission systems * High-availability production architecture * AI and MCP integrations This experience has given me a strong understanding of both **software engineering and the business side of building complex products**. ### AI-Assisted Software Development AI has become a core part of my development workflow. I actively work with tools and technologies such as **OpenAI Codex, ChatGPT, Claude, Cursor, Copilot, LLM APIs, AI agents, and MCP** to accelerate software development, analysis, debugging, documentation, and architecture work. However, I don’t see AI as a replacement for engineering expertise. My 15 years of development experience allow me to use AI effectively while still understanding, reviewing, testing, and validating the architecture and code being produced. The combination of **deep software engineering experience + modern AI development tools** allows me to deliver significantly faster without sacrificing software quality. ### More Than Development One of my strongest skills is **analysis and problem solving**. Before writing code, I focus on understanding: **What problem are we actually solving? What is the simplest architecture that can solve it reliably? What will happen when the system scales? Where can it fail? How will we monitor it? How will another developer maintain it later?** I have extensive experience breaking large projects into manageable components, defining system architecture, designing APIs and databases, identifying technical risks, and converting business requirements into clear development plans. I’m also comfortable taking ownership of projects where requirements are incomplete or constantly evolving. ### Technical Background My experience includes: * C# / .NET / ASP.NET Core * REST APIs and SDK development * JavaScript / TypeScript * Angular and modern web applications * SQL Server * PostgreSQL / TimescaleDB * MongoDB * Redis * Docker and Linux * Microservices and distributed systems * WebSockets and real-time systems * High-performance APIs * Authentication / Authorization / OAuth / JWT * Third-party API integrations * Financial and trading systems * Git and CI/CD * Prometheus / Grafana / Sentry / centralized logging * AI APIs, LLM integrations, MCP and AI-assisted development ### Project & Technical Leadership I have experience not only as a developer but also as a **technical lead and project owner**. I can independently handle: **Requirement Analysis → Architecture → Task Planning → Development → Code Review → Deployment → Monitoring → Production Support** This makes me especially effective for clients who need someone capable of taking responsibility for a project rather than simply completing isolated tickets. If you have a complex project, an existing system that needs improvement, a difficult integration, a fintech product, an API-heavy backend, or you want to integrate AI into your software, I can help you both **design the right solution and build it.** I’m particularly interested in long-term collaborations where I can deeply understand the product and contribute not only as a developer, but also as a **technical partner.** **If the problem is complex, that’s usually where I’m most useful.**

muhammedseker.net Hello, I'm Muhammed from Turkey. I have been developing software on .NET c# technologies since 2017. Currently, I am coding E-Commerce systems under Skechers brand in Turkey with ASP.NET CORE MVC. Since I work in corporate companies, I can write clean and understandable code, I leave comments lines. I can use Javascript and JQUERY library fluently and cleanly. Since I have HTML CSS Bootstrap knowledge, I can position myself as Full Stack. Experince 4+ Years My Linkedin Profile /in/muhammed-%C5%9Feker-31583a138/

I am a backend-oriented automation engineer who builds reliable systems that replace manual processes and reduce operational risk. My core strength is designing automation workflows with a developer mindset—using APIs, webhooks, and scripting to create systems that don’t silently fail or break under real-world data conditions. While many automations stop at surface-level integrations, I focus on backend logic, data validation, and system resilience. Zapier is one of the tools I use—but the real value comes from how the system is architected behind it.

I am a Senior Full-Stack Developer with 10+ years of experience, specialized in building modern, scalable, and user-friendly web and mobile applications. While I have a strong full-stack background, my main focus is frontend development with React and React Native. Tech Stack & Expertise 🔹 Frontend: React, Next.js, React Native, Expo, TypeScript, CSS, Tailwind, Material UI 🔹 Backend: .NET Framework, .NET Core, EF Core, Node.js 🔹 Databases: MSSQL, PostgreSQL, MongoDB 🔹 Other: REST APIs, GraphQL, microservices, cloud integrations What I bring: ✅ Clean, maintainable, and scalable code ✅ Strong experience in architecting and leading complex applications ✅ Proven ability to work across frontend–backend and ensure smooth delivery ✅ Focus on UI/UX excellence and performance optimization If you’re looking for someone who can deliver end-to-end solutions or integrate seamlessly into your existing team, I’d be happy to help.

Are you dealing with an aging .NET application that has become difficult to maintain, slow to change, or risky to upgrade? I help businesses modernize legacy .NET systems by migrating them toward maintainable, scalable architectures using modern .NET, APIs, cloud-native patterns, and clean architecture practices. I specialize in situations where a full rewrite is too risky. Instead of replacing everything at once, I design practical migration strategies that allow businesses to move step-by-step with minimal disruption. My experience includes: • Migrating legacy .NET Framework and WCF systems to Modern .NET (6/8/9) • Designing facade and strangler-pattern migration approaches for zero-downtime transitions • Breaking monolith applications into maintainable services and APIs • Modernizing authentication, authorization, and identity flows • Database migration strategies for large existing systems • Performance optimization and cloud cost reduction One of my recent modernization projects involved transforming a legacy WCF-based platform into a modern .NET 8 ecosystem. I designed a transition layer that allowed existing customers to continue using the old system while new functionality was gradually moved to the new platform. The solution included: • Facade API for controlled migration • JWT/OAuth2 based authentication transition • Multi-tenant identity services • Document processing and migration workflows • EF Core based services • Redis caching optimization • API Gateway architecture • Angular administration dashboard • Workflow automation using Elsa The result was a phased migration with no business downtime, reduced infrastructure pressure, and a platform that could evolve much faster. Technical expertise: Backend: C#, .NET 8/9, ASP.NET Core, Web APIs, Minimal APIs, EF Core, Dapper Architecture: Clean Architecture, DDD concepts, CQRS, Microservices, Facade Pattern, Strangler Migration Pattern Legacy: .NET Framework, WCF, Monolith Applications, Database Modernization Security: OAuth2, OpenID Connect, JWT, SSO, OpenIddict Frontend: Angular, TypeScript, RxJS Cloud & DevOps: Azure, Docker I focus on solving difficult modernization problems, not just writing new features. If your application works today but has become expensive, fragile, or hard to evolve, I can help you plan and execute the transition.

I’m a software engineer with strong backend expertise and hands-on experience across data engineering, integrations, messaging systems, and dashboard-driven applications. My main focus is building reliable, scalable systems with .NET and Python, but my work usually goes beyond a single layer. I’ve built APIs, microservices, queue-based architectures, ETL pipelines, reporting systems, internal tools, and frontend dashboards that turn complex data into usable products. I work comfortably with ASP.NET Core, FastAPI, RabbitMQ/AMQP-based systems, PostgreSQL, MSSQL, Redis, Docker, and AWS. On the data side, I’ve worked with Python, Pandas, NumPy, Scala, and Spark for data processing, transformation, reporting, and pipeline development. When a project needs frontend support, I can also handle dashboard and admin-style interfaces with Vue.js and data visualization tools. Over the years, I’ve worked on projects involving factory analytics, IoT-style data flows, internal operational tools, reporting platforms, queue-based integrations, and full-stack systems built from scratch. I’ve helped teams improve system reliability, reduce downtime, clean up unstable architectures, and turn unclear technical needs into maintainable solutions. What I usually help clients with: - Backend API development with .NET Core / ASP.NET Core and Python / FastAPI - Microservices and distributed system design - RabbitMQ, AMQP-based communication, event-driven flows, and background job processing - ETL pipelines, reporting systems, and data transformation workflows - Spark / Scala or Pandas / NumPy based data processing - PostgreSQL / MSSQL database design and backend business logic - Dashboard and admin panel development for operational visibility - System integrations, performance improvements, and production-ready architecture How I work: - I focus on building systems that are clean, practical, and maintainable - I care about delivery speed, but not at the cost of long-term stability - I can take ownership from architecture to deployment - I communicate clearly and try to be a real technical partner, not just someone writing tickets My background is strongest in backend engineering, but I’m at my best in projects where backend, data, and product behavior need to work together properly. If you need someone who can design the architecture, build the core system, handle integrations, and make the data actually useful on the product side, I’d be glad to help.