Fatih Eren Sayın - Software Engineer | Backend Developer

Hi, I'm Fatih

Software Engineer | Backend Developer | .NET & C# Expert

I design and develop scalable and high-performance backend systems.

About Me

Hello! I'm Fatih Eren Sayın

I graduated from Maltepe University with a degree in Computer Engineering. I'm a software developer specialized in backend development, who enjoys designing scalable and high-performance systems. I've been working as a Backend Developer at Kodiks Bilişim since March 2022.

Specialized in .NET (C#) technology, I'm experienced in microservices architecture, API development, database design, and system optimization. I develop high-traffic systems with modern technologies like Redis, RabbitMQ, Docker, and Azure DevOps.

Years Experience

10+

Projects

Languages

Education

Maltepe University

Computer Engineering

Full Scholarship | 2022

Skills & Technologies

Backend Development

.NET (C#) 95%

RESTful API Design 90%

Microservices Architecture 85%

Database & Caching

MSSQL 90%

PostgreSQL 85%

Redis 80%

DevOps & Tools

Docker 85%

Azure DevOps & CI/CD 80%

RabbitMQ 75%

Professional Experience

Backend Developer

Kodiks Bilişim March 2022 - Present Istanbul, Turkey

.NET (C#) MSSQL PostgreSQL Redis RabbitMQ Docker Azure DevOps Hangfire

Designing scalable RESTful APIs and database schemas for high-traffic systems
Designing and implementing custom background job systems using Hangfire
Optimizing system performance by implementing caching strategies with Redis
Developing asynchronous messaging integrations with RabbitMQ
Managing CI/CD pipelines through Azure DevOps

Backend Developer (Volunteer)

Facultio November 2024 - Present Istanbul, Turkey

Developing scalable RESTful APIs with features like rate limiting
Supporting CRUD operations and API development
Working closely with cross-functional teams
Actively participating in code review and testing processes

Backend Developer Intern

Cornea Aerosystems (TCI Aircraft Interiors) June 2021 - September 2021 Istanbul, Turkey

Assisted in backend development tasks using .NET
Supported SMTP system implementation within wireless IFE system
Enhanced knowledge in fundamental programming concepts

My Projects

QRAll

Comprehensive QR code management system. Responsible for end-to-end backend infrastructure design, development, and maintenance.

.NET PostgreSQL Redis Hangfire Docker

Scalable RESTful APIs and database schemas
Custom background job systems with Hangfire
High-performance operations

ThinkVoice

AI-powered platform analyzing customer service and sales call data. Responsible for full backend development.

.NET Machine Learning PostgreSQL RESTful API

Advanced machine learning integrations
Real-time reporting and interactive dashboards
Scalable architecture efficiently processing large datasets

Adisyo

Restaurant management system API development used in high-traffic, live environment.

.NET Redis RabbitMQ Azure DevOps CI/CD

RESTful APIs used in high-traffic environment
Caching and performance optimization with Redis
Asynchronous messaging integration with RabbitMQ

Latest Blog Posts

My thoughts on backend development and software engineering

Featured

October 15, 2025 15 min

PostgreSQL vs MSSQL: Which One When?

Comprehensive comparison of two popular database systems. Detailed analysis on performance, cost, features and decision-making guide on which one should be preferred in which scenarios...

PostgreSQL MSSQL Database

Featured

October 20, 2025 25 min

Scalable Systems with CQRS and Event Sourcing

Using CQRS and Event Sourcing patterns in modern software architecture. Distributed systems, eventual consistency, event-driven architecture and production use cases...

CQRS Event Sourcing Microservices

Featured

September 20, 2025 20 min

Background Job Processing with Hangfire

Managing background jobs, scheduled tasks and recurring jobs in .NET applications using Hangfire. Fire-and-forget, delayed, continuation job types and production deployment guide...

Hangfire .NET Background Jobs

Contact

Get In Touch

Have a project? Want to work together? Don't hesitate to contact me!

Email

[email protected]

Phone

+90 541 810 21 23

Location

Istanbul, Turkey