$ whoami

Serdar Zeybek

Senior Backend Engineer // İzmir, Turkey

I design scalable microservice architectures for fintech and B2B platforms — with .NET Core, Domain‑Driven Design and event‑driven systems.

get_in_touch()linkedin ↗

$ ls ./selected-work

01 · 2024 — now★ PSM Awards Gold Prize

Halkbank Child Banking

Senior Software Engineer · via RoofStacks

Designing and building backend services for Halkbank’s child‑focused digital banking platform — secure, high‑availability financial services built to scale.

fintech
microservices
cloud-native

02 · 2020 — 2024

B2B Procurement Platform

Software Specialist · SabancıDx

A digital purchasing ecosystem bringing buyers and suppliers together. Built on microservices with Domain‑Driven Design, and modernized legacy systems for better maintainability and deployment reliability.

ddd
microservices
legacy-modernization

$ git log --career

Senior Software Engineer @ RoofStacks

Jun 2024 — present · Software consultant

HEAD → current

Software Specialist @ SabancıDx

Sep 2020 — Jun 2024 · B2B procurement platform, Scrum team

$ cat stack.json

stack.json

"core": [

"C# / .NET Core",
"Go",
"Entity Framework Core"

]

"architecture": [

"Microservices",
"Domain-Driven Design",
"Event-driven (RabbitMQ)",
"API Gateway (YARP)"

]

"security": [

"OAuth2 / JWT",
"mTLS",
"Encryption"

]

"data_cloud": [

"PostgreSQL",
"MongoDB",
"Redis",
"Docker",
"Azure"

]