[email protected] | Kaunas, Lithuania | [LinkedIn](https://www.linkedin.com/in/robertasr/) | [GitHub](https://github.com/bitkojine)
.NET/C# developer with 7 years of experience in high-volume data processing, billing systems, and database optimization. Background in AdTech, energy sector, and market research. Seeking to transition into payment systems and FinTech where I can apply my technical skills to meaningful financial infrastructure.
Seeking: Contract or permanent roles in payment systems, FinTech, or financial services (remote, 3-12 month engagements welcome) Tech: .NET/C#, TypeScript, Angular, MS SQL Server, ElasticSearch, REST APIs, Billing SystemsDeveloped microservices for real-time programmatic ad bidding platform. Built high-volume data processing pipelines handling millions of daily transactions. Optimized .NET backend services and database queries for distributed systems.
Developed billing systems and self-service portals for energy provider. Worked on data platform architecture (data warehouse, data lake) and enterprise systems. Built with .NET, Azure SQL Server, and Azure cloud services.
Delivered .NET and TypeScript solutions across multiple client engagements (Super How, Baltic Amadeus, Simplanova). Focused on rapid onboarding, full-stack development, and delivering value in time-boxed projects.
Full-stack development for global market intelligence platform. Built data-driven analytics solutions with Angular frontend and .NET backend. Worked with REST APIs, data analytics, and BI tools for enterprise clients.
Optimized MS SQL Server performance for large-scale market intelligence platform. Implemented ElasticSearch infrastructure for fast data retrieval. Designed and built ETL pipelines, reducing query times by 61% through database indexing strategies.
Transitioning into payment systems, FinTech, or financial services roles where I can apply my .NET expertise and experience with billing systems and high-volume data processing to meaningful financial infrastructure. Open to contract engagements (3-6 months) or permanent positions. Remote preferred, available immediately.