Mehmet Yagci

Senior Backend Engineer

05/2024 - Present

Wordline, Istanbul, Turkey | Hybrid (Office + Remote)

• Developed web applications and RESTful APIs using C# and ASP.NET Framework for Terminal Management System (TMS), enabling real-time management of 500,000+ POS terminals across Turkey
• Created C# integration services to synchronize transaction data with 100% success rate and full compliance with Turkish Revenue Administration regulations

Integration Engineer

09/2021 – 05/2024

Anterra Technology, Texas, US | Fully Remote

• Engineered Acumatica ERP to AnterraBI(Business Intelligence) platform integration using AWS serverless stack (SQS, Lambda,CloudWatch) and C#, enabling real-time financial data synchronization for 10+ clients
• Led technical development for Acumatica ISV certification, completing 20+ compliance requirements and securing officialpartnership status
• Automated new customer setup for Acumatica integrations, reducing implementation time from 2-3 days to minutes and increasing operational efficiency by 30%

Full Stack Developer

01/2021 - 09/2021

Halkbank, Istanbul, Turkey | Hybrid (Office + Remote)

• Performed full-stack development for thousands of users on the core banking platform of Turkey's 4th largest bank
• Developed RESTful services and web modules using: ASP.NET Core MVC 3.1, Web API, IBM Mainframe, CQRS, MediatR
• Ensured code quality with SonarQube and Fortify; wrote unit tests using xUnit
• Managed CI/CD pipelines using Jenkins across environments (Dev→Test→PreProd→Prod)

Software Architect

01/2020 - 12/2020

Yesilsoft, Istanbul, Turkey | On-site

• Architected end-to-end web-based Tire Management System (wise-dynamic.com) for fleet operations
• Designed relational databases (MSSQL) and RESTful APIs (.NET Core 3.1) for Android/iOS mobile integration
• Developed business logic using C#, Entity Framework and MVC front-end components (HTML5/JS/jQuery)
• Managed Agile SDLC with Azure Git, daily standups, and cross-platform issue resolution

Full Stack Software Engineer

06/2019 - 12/2019

Turkish Technic, Istanbul, Turkey | On-site

• Developed RESTful APIs using .NET Core and Clean Architecture, focusing on scalability and maintainability
• Collaborated closely with frontend and mobile teams to design API contracts and ensure smooth integration
• Conducted code reviews and mentored junior developers, maintaining clean, maintainable code aligned with best practices

Full Stack Software Engineer

07/2017 - 06/2019

KocSistem, Istanbul, Turkey | On-site

• With experience in multiple software development projects, I have contributed to enterprise-level integrations, API development, and system optimization across different domains. Below are some of my key projects:
• 1. Digital Signage & Content Management Platform (Pixage)
  • Developed RESTful APIs using ASP.NET Core for secure content upload and management, integrated with Nuxeo for document storage.
  • Engineered Exchange/Outlook meeting room integrations, enabling dynamic display of reservation data on digital signage screens.
  • Improved system performance by optimizing database queries and resolving critical bugs.
  • Collaborated with cross-functional teams (Support, DevOps, Architecture) in an Agile (Scrum) environment.
• 2. Dealer Management System (DMS) – Maserati & Ferrari Turkey
  • Designed and maintained real-time integration between Ferrari-Maserati’s Italy HQ system and local Turkish DMS, ensuring seamless data flow for sales, service, and inventory.
  • Built a log monitoring dashboard using ASP.NET MVC & Bootstrap to track integration health and troubleshoot issues.

Full Stack .NET Developer

11/2016 - 06/2017

YeniMedya, Istanbul, Turkey | On-site

• Developed and maintained an ASP.NET MVC application using C#, Razor/ASPX view engines, designing Views, Controllers, and business logic layers for a high-traffic poetry and content-sharing platform(antoloji.com) with 120,000+ daily visitors.
• Improved system performance by refactoring legacy code, optimizing database queries, and implementing responsive web design (RWD) for better mobile compatibility.
• Enabled seamless deployments through CI/CD pipelines, automating build, test, and publish processes to reduce downtime.
• Led the migration from legacy architecture to ASP.NET MVC, enhancing scalability and user experience while maintaining platform stability.

Senior Software Developer

11/2008 - 07/2016

Ozel Sema Hastanesi, Istanbul, Turkey | On-site

Software & Integration Architecture
• Developed a Hospital Information System (HIS) covering the full patient processing cycle (registration to discharge).
• Designed and implemented specialized modules, including laboratory, radiology, and stock management systems.
• Built the project using .NET technologies, with a C# Windows Forms frontend and a custom ORM framework at the core.
• Applied Object-Oriented Programming (OOP) principles in system design and development.
• Led the analysis, design, and integration of new modules with third-party systems.
Software Design, Development & Deployment
• Integrated HIS with a custom accounting application, enabling seamless exchange of customer, sales, and purchase data.
• Developed real-time integrations with government web services for compliance and reporting.
• Designed, tested, and deployed a drug tracking module for inpatient care.
• Managed software deployment for domestic and international sites.
• Optimized end-user efficiency by designing and implementing new workflows and providing training.

Junior Software Developer

08/2006 - 11/2007

Venero Information Technologies, Istanbul, Turkey | On-site

• Developed Windows Forms applications in C# (.NET) for the cargo sector.
• Wrote SQL queries and designed financial reports using Active Report.

Bachelor of Mathematical Engineering

2000 - 2006

Yildiz Technical University, Istanbul, Turkiye

Key Subjects: Mathematical Analysis, Linear Algebra, Numerical Methods, Differential Equations, Probability & Statistics, Optimization, Computational Mathematics, Programming (C, C++, Java)

Acumatica Application Developer

2022

Self-paced learning via Acumatica Developer Training on Acumatica Learn Portal

Topics: Customization, Application Building, Data Access, Web Services, REST API, Integration Techniques, C# Development, SQL Queries, UI Customization, Business Events, Platform Architecture — all within the Acumatica ERP platform.

Cloud Developer using Microsoft Azure

2021

Completed the "Cloud Developer using Microsoft Azure" Nanodegree program via Udacity, online

Topics: Azure Applications, Microservices Architecture, Azure Migration Strategies, Performance Optimization in Azure, Cloud Security and Monitoring

React Nanodegree — Web and Mobile Application Development

2019

Completed the React Nanodegree program via Udacity, online

Topics: JavaScript ES6, React & Redux, React Native for Mobile Development