Available for Engineering Roles

BERKAY BAYAR

Software Engineer specializing in the .NET ecosystem, Clean Architecture, and building production-grade infrastructure. high-performance backends , distributed systems , and scalable B2B SaaS

01 / ABOUT

Engineering Scalable
Solutions That Matter

I'm a Software Engineer with over 3 years of production experience, moving beyond standard implementations to build robust, distributed systems. My background spans from high-traffic gaming infrastructure to commercial B2B SaaS products.

Deeply specialized in the .NET ecosystem (NET 8), I focus on solving complex architectural challenges. I don't just write code; I design systems that are maintainable, testable, and capable of handling heavy concurrency.

Currently seeking opportunities to bring my expertise in CQRS, Microservices, and Database Optimization to a professional enterprise engineering team.

3+
Years Experience
10k+
Users Served
500%
Perf. Optimization
B2B
SaaS Products
02 / EXPERIENCE

Where I've Contributed

ZDK Network

Backend Software Engineer

2022 – 2025
  • Core team member for a high-traffic game server provider serving 10k+ concurrent users
  • Architected distributed systems using .NET 6+, Redis (caching), and RabbitMQ (async processing)
  • Built mission-critical internal tooling and Admin Panels, reducing support ticket resolution times
  • Implemented CI/CD pipelines via GitHub Actions to automate backend API deployments

Independent Developer

Lead Full Stack Engineer

2023 – Present
  • End-to-end ownership of Trendyol Analytics SaaS, managing the full lifecycle from architecture to billing
  • Delivering custom React dashboards and .NET automation tools for international clients
  • Optimizing legacy SQL schemas to reduce API response times for business-critical reporting
03 / PROJECTS

Featured Work

COMMERCIAL B2B

Trendyol Analytics SaaS

A multi-tenant analytics platform for sellers on Trendyol (the largest e-commerce marketplace in MENA). Transformed a single-client request into a scalable subscription product.

.NET 8 Razor Pages MSSQL Hangfire CQRS Docker
Role: Lead Engineer & Product Owner
OPEN SOURCE

TrendyolClient.Sharp

A strict, type-safe .NET SDK for the Trendyol Developer API. Encapsulates complex HTTP endpoints and rate-limiting logic to improve the developer experience for the .NET community.

C# .NET REST API SDK Design
View on GitHub
PERFORMANCE TOOL

ExcelQueryCLI

High-performance CLI for bulk Excel manipulation. Replaced slow OLEDB methods with a multi-threaded parallel processing engine, achieving a 500% speed increase.

.NET 8 EPPlus Multi-threading CLI
View on GitHub
DISTRIBUTED SYSTEMS

Gaming Infrastructure

Comprehensive backend for game server hosting. Microservices architecture handling authentication, billing, and real-time player session data.

.NET PostgreSQL Redis RabbitMQ Docker
04 / SKILLS

Technical Arsenal

Languages

C# ★ TypeScript SQL (T-SQL) Python

Backend

.NET 8 ★ ASP.NET Core MediatR (CQRS) Hangfire RabbitMQ

Frontend

React.js ★ Next.js Razor Pages Tailwind CSS

Data & Storage

SQL Server PostgreSQL Redis EF Core MongoDB

DevOps & Tools

Docker GitHub Actions CI/CD Git

Architecture

Clean Architecture ★ CQRS Microservices DDD
05 / CONTACT

Let's Build
Something Great

I'm currently looking for engineering opportunities where I can contribute to scalable systems. Whether you have a technical question or a job opening, I'd love to hear from you.