Chamara Wijesena

Developed and maintained backend-heavy services for an education-sector platform using Django REST Framework; designed and implemented authentication and authorization flows across multiple user roles; built internationalization (i18n) support; architected backend solutions with server-side business logic; designed REST APIs consumed by React frontends in close collaboration with frontend teams; worked with PostgreSQL and Redis to ensure reliability, performance, and maintainability.

Designed and implemented Manage File Transfer (MFT) systems across all hospitality products to ensure secure and efficient data handling. Responsible for onboarding new clients and developing new MFT solutions with self-defined architecture. Developed OCR solutions for data extraction and handled SQL, Postgres, Python, AWS, and file processing. Designed architectural solutions and wrote data integrations and file processing across products. Created custom OCR for different file formats, API integrations, and event-driven/scheduled architecture solutions using Python, AWS, Aspose, Snaplogic, Snowflake, and APIs.

Designed and deployed multi-source file ingestion pipelines (SFTP, email triggers, AWS inputs) automating hotel night audit and accounts receivable processing. Built a large-scale Accounts Receivable automation system processing RTF, XLSX, and PDF documents end-to-end. Developed Python data extraction pipelines with Pandas & NumPy achieving 95%+ data accuracy and reducing manual intervention to 5%. Implemented real-time watchdogs and alerting; designed multi-stage validation and fault-handling workflows; integrated OCR and RTF-to-PDF conversions; built SnapLogic pipelines to Snowflake and to downstream systems; ensured scalability with AWS integration and cross-team collaboration.