Gökhan Gülşen

As an outsource software developer for Volkswagen at Doğuş Technology, I specialize in the development, management, and optimization of REST API projects. My role within the Interactive and Web Projects team involves a diverse range of responsibilities and contributions.

• Develop and support Vue.js front-end applications with TypeScript and .NET back-end for various web applications
• Design, maintain, and optimize CI/CD pipelines using Azure DevOps for automated deployments and continuous integration
• Manage and support Microsoft SQL Server (MSSQL) and PostgreSQL databases, ensuring high availability and performance optimization
• Implement real-time messaging notifications using SignalR and utilize Redis, and Hangfire for enhanced application performance and scalability
• Adhere to SonarQube standards, engage in code reviews, and write comprehensive Unit Tests using xUnit to ensure code quality and robustness
• Work closely with DevOps, networking, and database management teams to ensure cohesive system integration

Technologies and tools I used during this role: Backend: .NET Web API, ASP.NET Core MVC, Entity Framework Core, T-SQL | Frontend: Vue.js, TypeScript | Others: JWT, SignalR, Redis, Hangfire | Cloud: Microsoft Azure (including Azure DevOps) | Database: MSSQL, PostgreSQL | Architecture: Modular Monolith, Monolith | Practices: Agile/Scrum, CI/CD, Code Reviews, Unit Testing, SonarQube

Developing and maintaining a comprehensive financial platform that enables users to compare and apply for various banking products including loans, credit cards, and deposits. The platform provides real-time market data, financial calculators, and a user-friendly interface for financial product comparison.

• Developed a microservices-based financial platform using .NET, Docker, and Kubernetes for scalable and containerized architecture
• Built credit application and calculation modules with real-time processing using RabbitMQ for message queuing and Redis for caching
• Developed deposit management system with interest rate comparisons and product filtering capabilities
• Created stock market, financial markets, and cryptocurrency management modules with real-time data tracking using Elasticsearch for search and analytics
• Implemented user authentication and authorization system using JWT for secure access to financial services
• Built responsive frontend using Nuxt.js with Server-Side Rendering (SSR) for improved performance and SEO optimization, integrated with PrimeVue, TypeScript, and Tailwind CSS
• Integrated OpenTelemetry for distributed tracing and monitoring, with Grafana and Kibana for observability and log analysis
• Managed CI/CD pipelines using Azure DevOps for automated deployments and continuous integration
• Stored and managed financial data using MongoDB for flexible document-based storage and Elasticsearch for advanced search capabilities

Technologies and tools I used during this role: Backend: .NET, Microservices Architecture | Frontend: Nuxt.js (SSR), PrimeVue, TypeScript, Tailwind CSS | Infrastructure: Docker, Kubernetes, Azure DevOps | Messaging & Caching: RabbitMQ, Redis | Database: MongoDB, Elasticsearch | Security: JWT | Observability: OpenTelemetry, Grafana, Kibana | SEO: Server-Side Rendering (SSR) for improved search engine optimization and performance | Features: Credit card management, credit applications and calculations, deposit management, stock market tracking, financial markets, cryptocurrency management

Worked as a Fullstack Developer on backend systems and frontend applications, implementing modern architectural patterns and best practices.

• Added new features to the backend system which is based on Onion Architecture
• Developed new pages using VueJS CLI and JavaScript
• Implemented CQRS (Command and Query Responsibility Segregation) architectural pattern via MediatR
• Generated data models in Web API using Entity Framework Core Code First approach with Fluent API
• Implemented token-based authentication using JWT to secure Web API
• Implemented Custom Exception Filters to handle internal errors for Web API
• Tested Web API HTTP calls using Postman

Technologies and tools I used during this role: Backend: ASP.NET Core, Web API, Entity Framework Core, Onion Architecture, CQRS, MediatR | Frontend: VueJS, JavaScript | Others: JWT, Fluent API, Custom Exception Filters | Testing: Postman | Practices: End-to-End Software Development Life Cycle, Agile Methodologies, Jira

Worked on a comprehensive software project that organizes workflows between requesting companies, valuation companies, and valuation experts, facilitating the valuation process and recording every transaction.

• Proficient in implementation of N-Tier Architecture Data Access Layer, Business Logic Layer and User Interface
• Developed web pages and style sheets using JavaScript, HTML and CSS
• Handled file uploads with multer package. Files are uploaded to AWS S3 storage via aws-sdk
• Send all emails with the Sendgrid package
• Involved in complete Software Development Life Cycle (SDLC) including Agile Methodologies

Technologies and tools I used during this role: Architecture: N-Tier Architecture (Data Access Layer, Business Logic Layer, User Interface) | Frontend: JavaScript, HTML, CSS | Cloud: AWS S3 | Others: Multer (file uploads), Sendgrid (email), AWS SDK | Practices: Software Development Life Cycle (SDLC), Agile Methodologies