# Serdar Zeybek

> Senior Backend Engineer based in İzmir, Turkey. I design scalable microservice architectures for fintech and B2B platforms — with .NET Core, Domain‑Driven Design and event‑driven systems.

Website: https://serdarzeybek.net/

## Selected work

- **Halkbank Child Banking** (2024 — now) — Senior Software Engineer · via RoofStacks. PSM Awards Gold Prize. Designing and building backend services for Halkbank’s child‑focused digital banking platform — secure, high‑availability financial services built to scale.
- **B2B Procurement Platform** (2020 — 2024) — 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.

## Experience

- Senior Software Engineer at RoofStacks — Jun 2024 — present · Software consultant
- Software Specialist at SabancıDx — Sep 2020 — Jun 2024 · B2B procurement platform, Scrum team

## Skills

- 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

## Contact

- email: serdarzeybek[at]outlook.com
- linkedin: https://www.linkedin.com/in/serdar-zeybek
- github: https://github.com/zeybekserdar
- medium: https://serdarzeybek.medium.com