Mohammad Rijvana

Designed and implemented a configurable construction cost management system supporting material, labor, equipment, unit rate, and custom cost templates with formula-based calculation logic. Built dynamic, template-driven pricing workflows enabling flexible cost modeling across projects. Contributed to a microservices-based architecture, implementing cost-related services using gRPC for inter-service communication. Defined gRPC .proto contracts and implemented cost-related services with structured layering (controllers, services, repositories, models) ensuring clear separation of concerns. Integrated APIs through an API Gateway layer and ensured secure, structured validation and error handling. Integrated enterprise systems including IFS ERP and ZoomInfo for opportunity and data synchronization. Implemented ML-based opportunity win prediction using Logistic Regression and deployed inference via AWS Lambda. Designed and implemented equipment allocation lifecycle workflows for asset tracking and utilization. Integrated WordPress modules with core backend services. Resolved critical production issues and improved performance in a large-scale Angular + Node.js codebase.

Implemented secure authentication and role-based access control (RBAC) for multi-role platform access (vets, paravets, farmers). Owned end-to-end deployment of Django backend and React frontend on AWS Lightsail, configuring Nginx as reverse proxy and Gunicorn as WSGI server to ensure secure and stable production environments. Managed server provisioning, environment configuration, domain setup, and basic monitoring for production workloads. Integrated Interakt for automated customer communication workflows and notification handling. ● ● ● Modified and maintained IVR integrations to align with evolving third-party API requirements. Built operational and analytical reports to support business decision-making. Optimized database queries and improved application stability through debugging and structured logging.