Matthaios Ioannidis

Designed and optimized .NET Core RESTful APIs backed by Azure Cosmos DB to enable scalable, high-performance data access; implemented xUnit/NSubstitute test suites to maintain >90% coverage and reduced defects by 30% through code reviews and best practices.

Built and maintained lottery and sports betting platforms using .NET Core, Java EE and Python; implemented Redis caching for low-latency real-time data and developed React/Redux agent apps, improving operational efficiency.

Built backend services for payments (card schemes, IBANs, bill payments) using .NET and SQL Server and implemented Refit-based REST APIs to integrate new payment schemas with comprehensive NUnit/Moq tests.

Developed .NET Framework web tools and ASP.NET Web API 2 services for LTE/4G network documentation, improving publishing efficiency by 20% and aligning outputs with global Nokia standards.

Supported In-Service Upgrades for LTE networks, debugging element servers and resolving production issues using Python automation and log analysis to perform root-cause investigations.

Master's Degree in Advanced Information Systems completed in February 2018 with a thesis on prediction of financial time series.

Bachelor's Degree in Electronic Engineering completed in June 2013 with a thesis on design and implementation of telecommunication designs on FPGA chip.