Leo Amit Dcosta

Central Network Monitoring System (Developed Central Network Monitoring System to oversee network performance.)

• Architected a full-stack network monitoring platform using React (Vite), Material UI, and ASP.NET Core Web API with PostgreSQL, tracking real-time telemetry across railway infrastructure.
• Engineered an SNMPv3 background service in Python (FastAPI) and integrated WebSockets to deliver sub-second, bidirectional device status updates and live telemetry without page reloads.
• Implemented enterprise security and analytics suite, incorporating JWT authentication, role-based access control (RBAC), and interactive Recharts data visualisations.

Integrated Passenger Information System (IPIS)

• Engineered and maintained mission-critical railway software using C#, ASP.NET Core, and Python, enhancing real-time system reliability through IoT improvements.
• Deployed low-latency VoIP streaming infrastructure via Mumble architecture and developed Windows Service-based Common Alert Protocol (CAP) handler for automated alert processing.
• Automated multilingual public address announcements by integrating .NET Speech Synthesis with custom regional audio processing modules.
• Mentored junior engineers on UI-to-backend synchronization and workflow automation for passenger information modules using PyQt.

• Developed scalable web applications and backend services using C#, .NET, JavaScript, HTML, and CSS, enhancing core business workflows for internal client portals.
• Optimized relational database performance by designing complex SQL queries, multi-table joins, and strategic indexing, significantly reducing query execution times.
• Automated purchase order parsing by engineering regex-based data extraction scripts, reducing manual entry and expediting record processing for client accounts.
• Standardized code review and debugging pipelines, identifying critical bottlenecks and reducing post-release defects to deliver robust, production-ready software.