[email protected] | Kaunas, Lithuania | [LinkedIn](https://www.linkedin.com/in/robertasr/) | [GitHub](https://github.com/bitkojine)
Backend software engineer with 6+ years building high-throughput systems for AdTech, energy utilities, and market intelligence platforms. Specialized in .NET/C# microservices, real-time data pipelines processing millions of daily events, and database optimization for sub-100ms latency requirements.
Core Stack: .NET/C# • Microservices • Kafka • Azure SQL Server • ETL Pipelines • AngularDeveloping microservices for global programmatic advertising platform processing 10+ billion daily ad requests with sub-100ms latency SLAs across distributed systems.
- Architected Kafka-based event streaming pipelines achieving 99.9% message delivery reliability for revenue-critical bidding transactions
- Optimized .NET microservices reducing average response time by 35% through async processing and connection pooling
- Implemented distributed tracing and monitoring reducing incident detection time from hours to minutes
- Collaborated with cross-functional teams across 5 countries on system scalability and fault tolerance improvements
Developed enterprise billing and metering systems for Baltic region's largest energy provider serving 1.4M+ customers across Lithuania, Latvia, Estonia, Poland, and Finland.
- Built billing system processing 50K+ monthly enterprise transactions with automated invoice generation and payment reconciliation
- Architected ETL pipelines ingesting 2M+ daily smart meter readings from Azure IoT Hub into Synapse data warehouse
- Optimized Azure SQL Server stored procedures reducing billing cycle runtime by 60% through indexing and query refactoring
- Integrated Power BI dashboards enabling real-time energy consumption analytics for 200+ corporate clients
- Implemented hybrid cloud data synchronization between on-premise legacy systems and Azure infrastructure
Full-stack development for blockchain-enabled education platform and digital infrastructure projects with rapid iteration cycles and modern technology adoption.
- Delivered 3 production releases within 6-month timeframe using agile sprints and continuous deployment
- Built REST APIs and microservices supporting blockchain wallet integration and digital credential verification
- Implemented automated testing pipelines reducing regression bugs by 40% and accelerating release cycles
- Collaborated on R&D initiatives exploring decentralized identity solutions and Web3 technologies
Delivered enterprise software solutions and cloud modernization projects for international clients across logistics, finance, and manufacturing sectors.
- Developed scalable .NET microservices handling 100K+ daily API requests for logistics tracking platform
- Migrated legacy monolithic applications to Azure cloud infrastructure reducing hosting costs by 30%
- Built integration middleware connecting ERP systems with third-party APIs for automated data synchronization
- Implemented CI/CD pipelines using Azure DevOps reducing deployment time from days to hours
Full-stack development specializing in Microsoft Dynamics NAV/Business Central modernization, upgrades, and automation tooling for ERP implementations.
- Developed automated migration tools reducing Dynamics NAV to Business Central upgrade time by 50%
- Built custom .NET extensions and integrations for 10+ client ERP implementations across retail and manufacturing
- Refactored legacy codebases improving maintainability through SOLID principles and comprehensive unit testing
- Optimized SQL Server queries and database schemas reducing report generation time by 40%
Full-stack development for Passport platform—global market intelligence system serving 5,000+ enterprise clients across 210 countries with economic, demographic, and industry analytics.
- Built Angular dashboards visualizing 50M+ data points across financial markets, consumer trends, and macroeconomic indicators
- Optimized SQL Server queries reducing dashboard load time by 70% through strategic indexing and query refactoring
- Implemented ElasticSearch infrastructure achieving sub-500ms search response time across 100M+ records
- Developed Python-based ETL pipelines processing daily feeds from 80+ countries with automated data validation
- Architected REST APIs with Redis caching reducing backend load by 45% and improving API response times
- Delivered 15+ feature releases supporting new market segments and data visualization capabilities