management desktop application, serving over 20,000 active clients daily. Built with Django (backend), React (frontend), and PyQt (desktop UI), the system handled live data streaming, advanced calendar/scheduling, and user management with strong focus on scalability and performance. ○ Optimizations: Improved authentication and API layer to support large-scale concurrency, optimized database queries and indexing, reduced DB load by 40% using Redis caching, and migrated time-consuming tasks to Celery for asynchronous processing—cutting API response times by 50%. ○ DevOps: Designed full CI/CD pipeline (Git, Docker, blue/green deployment), established rigorous automated testing (unit/integration). ○ Documentation & QA: Produced comprehensive developer and API documentation, enforced test-driven development, and led code reviews—resulting in robust, maintainable, and audit-ready releases. ○ Impact: Enabled seamless, low-latency user experiences at scale, doubling system throughput with high availability and minimal downtime. ○ Integrated Stripe, PayPal, Google Pay, and Apple Pay for seamless payments. ○ Implemented OAuth2, JWT, SSO, API Keys, and custom auth for security. ○ Delivered full CI/CD (GitLab Actions), blue/green releases, AWS S3 storage, end-to-end test cases, and OpenAPI docs. ○ Refactored SQL and added Redis caching/async processing—cut API latency by 50%, DB load by 40%. ○ Led with Agile/Scrum (Jira), ensuring rapid, reliable releases and top-tier UX.
- Back-End Developer
- Cloud Developer
- DevOps Developer