Rositsa Ivanov

Backend Developer with 7+ years of overall experience, including 4 years of experience in C#/.NET and Azure-based architectures. Specialized in backend feature development, integration, automated testing, and database optimization. Experienced working in international teams and Agile environments, with a strong focus on product reliability and scalability.

WORK EXPERIENCE

Backend Developer

1. One of Europe’s largest online travel agencies, 7International markets; (Netherlands, Belgium, Denmark, Sweden, France, UK, Germany); +€1.2 bn in turnover

• Backend development in .NET/C# for post-booking management and customer care systems, used daily by thousands of users.
• Performance and reliability improvements of critical features, including travel data and digital documents.
• Implementation of automated tests (unit, integration, and end-to-end), increasing robustness and reducing production incidents.
• Management of integrations with Azure (Functions, Service Bus, Logic Apps) and optimization of SQL/NoSQL queries.
• Active participation in Scrum processes: planning, review, refinements, and collaboration with product teams.

Skills & competencies

• Backend: C#, .NET, LINQ, SOLID, Clean Architecture, Design Pattern
• Testing: xUnit, FluentAssertions, Moq, AutoFixture, E2E Testin
• Cloud & Integrations: Azure Functions, Service Bus, Logic Apps
• Databases: SQL Server, MySQL, Redis, Cosmos DB
• Version Control: Git, GitHub
• DevOps: GitHub Actions / GitHub Deploy, Octopus Deploy, CI/CD
• Monitoring: New Relic, Kibana
• CMS: Sitecore 
• Frontend Development (support): HTML, CSS, JavaScript, React
• Project Workflow Management: Jira
• AI: Use of code assistants and generative AI tools (GitHub Copilot, ChatGPT, …) to accelerate refactoring, write tests, and produce technical documentation

Full Stack Developer

Barcelona Activa Project (Barcelona City Council) websites supporting job-seeking, training, and business initiatives.

• Focused on the development of internal web applications for project and people management.

Skills & competencies

• Backend: Java, Spring, JEE, ORM: Hibernate, Web services: REST/SOAP, SOLID, Clean Architecture, Design Patterns
• Frontend Development: HTML, CSS, JavaScript, jQuery, Ajax, Bootstrap
• Testing: jMock, Mockito
• Databases: MySQL Server,
• Version Control: Git, GitHub
• Web Containers: Tomcat, JBoss
• Project Workflow Management: Jira

Full Stack Developer

1. Ticket sales and access control platform for museums, theme parks, and wineries.

• Maintained and created new website components for wineries.

Skills & competencies

• Backend: Java, Spring, SOLID, Clean Architecture, Design Patterns
• Frontend Development: HTML, CSS, JavaScript, jQuery, Ajax
• Databases: MySQL Server,
• Version Control: Git, GitHub

End-of-degree Project

• Developed web service for preprocessing data for prediction of electrical load in non-residential buildings.

Skills & competencies

• Programming Languages: Python
• Frameworks: Flask;
• ML tools: scikit-learn, RapidMiner
• Statistical computing tools: pandas, R

Degree in Computer Science University of Girona, Spain (2012–2018)