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Senior Software Developer

Building enterprise_scale fintech and distributed systems.

With 6+ years of experience across HangiKredi & HangiPara, Borusan Holding, Nuevo Softwarehouse, Omerd & T&G Workshop — and retail operations leadership at Migros before that.

Get in touch

Istanbul, Türkiye · UTC+3

Oğuzhan Tomak
016+Years of Engineering Experience
0215+Enterprise Projects
03100%Fintech & Banking Focus

const frequentTech = [

Tech Stack

Using an ever-growing list of enterprise technology.

  • .NET Logo
    .NETFintech microservices & APIs
  • C#C#Async, LINQ & Memory
  • RabbitMQ Logo
    RabbitMQ & MassTransitEvent bus & Outbox pattern
  • Docker Logo
    Docker & RancherContainer orchestration & discovery
  • PostgreSQL Logo
    PostgreSQLACID & Query optimization
  • Redis Logo
    RedisDistributed cache & Session
  • ReactJSComponent architecture & UI
  • MS SQL ServerEnterprise relational database
  • MongoDBDocument models & Indexing
  • TypeScriptStrictly typed applications
]

// Tasks I've helped undertake and launch

Career & Experience

    • Developed scalable, high performance event-driven microservices for Wallet, Loyalty, and Payment domains using .NET, CQRS, MassTransit (RabbitMQ), PostgreSQL, Hangfire, and Redis.
    • Applied Domain-Driven Design (DDD) principles and optimized system performance.
    • Used Docker, Rancher, and Consul for container orchestration and service discovery.
    • Implemented internal and integration projects in payments, digital wallets, loyalty, and open banking.
    • Provided software training to junior developers via HangiKredi Technology Academy.
    • .NET
    • CQRS
    • MassTransit
    • RabbitMQ
    • PostgreSQL
    • Hangfire
    • Redis
    • Rancher
    • Consul
    • Fintech

    • Migrated legacy NopCommerce applications to modular monolithic architecture with .NET.
    • Led a team of 3 engineers in a procurement system project with Elasticsearch-based search.
    • Integrated various ERP, CRM, and payment platforms including Masterpass, Craftgate, Param, SAP B1 and MS Dynamics Business Central.
    • Delivered front-end interfaces using ReactJS and backend APIs using .NET.
    • .NET
    • Elasticsearch
    • ReactJS
    • SAP B1
    • MS Dynamics
    • Payment Gateways
    • B2B/B2C

    • Built appointment and reporting systems for psychological therapy platforms using .NET and MVC.
    • Enhanced concurrent test performance and developed integrations with external systems.
    • Migrated legacy projects initially developed in ASP 3.0 to modern .NET architecture.
    • Consolidated fragmented solutions into unified .NET test and inventory platforms.
    • .NET
    • ASP.NET MVC
    • C#
    • System Migration
    • Caching
    • REST API

    • Customized Microsoft Dynamics CRM using .NET backend and JavaScript frontend.
    • Delivered 15+ projects and integrated ERP, accounting, and currency APIs.
    • Focused on REST API development and troubleshooting.
    • .NET
    • Dynamics CRM
    • JavaScript
    • REST APIs
    • ERP Integration

    • Developed B2B and B2C e-commerce solutions for major Turkish brands using microservice architecture.
    • Delivered backend and frontend modules using .NET and Kendo UI.
    • .NET
    • Kendo UI
    • Microservices
    • E-Commerce

    • Managed operations across four Migros stores, overseeing 50+ staff and serving over 2,000 customers daily.
    • Optimized inventory, ordering, and stock management systems to reduce waste and improve availability.
    • Led training, scheduling, and performance evaluation of store personnel to enhance efficiency and customer satisfaction.
    • Executed sales strategies and ensured accurate, timely reporting to senior and regional managers.
    • Maintained compliance with legal, financial, and operational regulations while resolving customer issues swiftly.
    • Retail

// Academics & professional credentials

Academics & Certifications

  • 2016

    BSc, Business Informatics (İşletme Enformatiği)

    Halic University

    Istanbul, Turkey

  • 10/2019 – 01/2020

    .NET Certification Program (.NET Bootcamp - 320 hours)

    • Bilge Adam Akademi

    Verified credential

  • 10/2023

    Entrepreneurship Certificate

    • KOSGEB

    Verified credential

// Professional connect & collaboration

connect(senior_leadership)

Let's Build Enterprise Scale

Interested in discussing distributed architectures, fintech microservices, or senior engineering opportunities? Feel free to connect via LinkedIn.

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Istanbul, Türkiye · UTC+3