- Developed and tested backend features for a financial website using Node.js, Express.js, MongoDB, React.js, and GitLab.
- Created migration scripts to move legacy invoice records into a redesigned MongoDB database structure.
- Designed and executed more than 39 load-testing scenarios across authentication, entity management, and document processing.
- Used Postman and Atatus for performance and stress testing, evaluating system stability, resource usage, and concurrent workloads.
- Investigated, reproduced, and documented production issues involving document validation, cancellation workflows, and performance.
- Built and integrated a system-update notification banner with React.js and CSS.
- Documented backend architecture covering authentication, authorization, database transactions, file storage, and third-party integrations.
Node.jsExpress.jsMongoDBReactGitLabPostmanAtatus