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Oğuzhan Çevik

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Over Oğuzhan

I’m a backend engineer focused on building scalable and reliable systems, mostly in fintech and real-time applications.

I’ve been working with .NET for several years, designing microservices and event-driven architectures using tools like Kafka, RabbitMQ, and SignalR. I enjoy solving problems around high-load systems, messaging, and distributed workflows.

Recently, I’ve been working on electronic money and payment systems, dealing with things like transaction flows, system reliability, and integrations with external services (Open Banking, ERP, etc.).

I care about building systems that actually work in production, not just in theory. That means handling failures properly, making systems observable, and keeping things maintainable over time.

I’m comfortable taking ownership of backend systems end-to-end, from design to deployment.
  • Engels

    Tweetalig / moedertaal

  • Nederlands

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  • Frans

    Tweetalig / moedertaal

  • Duits

    Vloeiend

Uitsluitend remote
Werkt voornamelijk remote

Werkervaring

  • Parolapara Electronic Money Institution
    Software Engineer
    januari 2025 - Vandaag (1 jaar en 5 maanden)
    İstanbul, Türkiye
    Designed and developed high-availability backend services for electronic money, wallet, and payment systems using .NET Core and ASP.NET Core Web API
    Built distributed microservices using event-driven architecture, applying Saga Pattern, Outbox/Inbox, and idempotent processing for financial transactions
    Implemented asynchronous messaging and event streaming with RabbitMQ (MassTransit) and Kafka
    Developed real-time communication components using SignalR (WebSockets) for instant transaction processing and system status updates
    Applied Event Sourcing with EventStoreDB to ensure full auditability and traceability of financial operations
    Developed background and scheduled jobs using Worker Services, Quartz, and Hangfire
    Integrated Open Banking APIs, ERP systems (Logo Tiger), and third-party platforms (Next4Biz, Alotech)
    Prepared and maintained regulatory reports (Virtual POS, Wallet, B2C, FAST / TCMB)
    Designed and maintained scalable multi-tenant architectures
    Improved system resilience using Polly (Circuit Breaker, Retry, Timeout, Fallback, Hedging)
    Implemented secure authentication and authorization using JWT and IdentityServer
    Increased code quality and reliability through unit and integration testing with xUnit and Moq
    Established end-to-end observability using Jaeger, Zipkin, Prometheus, and Grafana
    Managed containerized deployments with Docker & Docker Compose, integrating NGINX, Ocelot, and YARP
    Built and maintained CI/CD pipelines using GitHub Actions and Azure
  • Frostline Games
    Software Engineer
    maart 2023 - januari 2025 (1 jaar en 10 maanden)
    İstanbul, Türkiye
    > Developed scalable backend services for real-time game systems using .NET Core and CQRS architecture. > Implemented asynchronous messaging using RabbitMQ (MassTransit) and Kafka. > Built real-time communication features using SignalR (WebSocket). > Increased code reliability through unit testing with xUnit and Moq. > Improved observability using Jaeger, Zipkin, and Prometheus. > Implemented service health checks to monitor system availability.
  • NetBT Consulting Services Inc
    Software Developer
    februari 2022 - oktober 2022 (8 maanden)
    İstanbul, Türkiye
    > Developed RESTful APIs using .NET / .NET Core with CQRS-based microservices architecture. > Worked in Agile/Scrum teams. > Used Git, Bitbucket, GitLab, Jira for version control and task management. > Gained basic frontend experience using JavaScript, HTML5, CSS

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Opleidingen

  • Bachelor Science
    Üsküdar University
    2023
    Software Engineer Backend Developer

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