At NDA (Fin-Tech sector), I developed transaction logic and scalable microservices for a high-load B2B payment aggregator and financial dashboard. I integrated payment providers, including cryptocurrency providers, and reduced costs by about 60% by migrating to a new SMS provider.
I also implemented background services for transaction lifecycle management and resolved concurrency issues in webhook processing. I wrote automated tests and scripts for development database seeding.
As a freelance Full-Stack Engineer, I delivered web solutions for e-commerce and business automation clients. I modernized legacy systems with ASP.NET Core APIs and improved database performance using PostgreSQL indexing and Redis caching.
At Avrelinex, I upgraded and maintained microservices and worked on backend features for web applications in the .NET ecosystem. I implemented asynchronous messaging with RabbitMQ, secured service-to-service communication with JWT, and worked with AWS services for deployment and cloud storage.
