Hasan Siddiqui

Built a serverless, event-driven system with AWS (Lambda, SQS, SNS, API Gateway, AppSync). Optimized SQL Server with read replicas and Redis caching for faster APIs. Cut AWS costs via serverless migration and automation. Led GraphQL adoption to boost performance. Integrated LLMs and Conversational AI with OpenAI APIs. Served as .NET SME for key Angular (TypeScript) modules, driving scalable, efficient, and modern cloud architecture.

Designed distributed microservices with .NET 6, AWS Lambda, RabbitMQ, and Kafka to improve scalability and resolve bottlenecks. Automated multi-stage CI/CD pipelines via Azure DevOps for reliable deployments. Built fault-tolerant, resilient systems using Polly and CloudWatch. Added TDD-based end-to-end tests for reliability. Integrated OpenAI’s ChatGPT-4 API to automate workflows and document summarization.

Enhanced JWT auth with refresh tokens in TypeScript (Angular). Optimized SQL stored procedures by resolving performance bottlenecks. Developed full-stack RESTful APIs with .NET Core and jQuery integration. Conducted code reviews and refactored legacy modules using Clean Architecture, Clean Code, and DDD to improve modularity, reduce technical debt, and ensure maintainable, scalable software systems.

• Developed GDPR-Compliant data masking utility for various data sources across the region. • Resolved a 20-year-old memory leak issue by disposing of objects in the legacy COM+ component. • Led a team of 8 engineers and migrated an enterprise application to Microsoft Azure hybrid cloud for 40K concurrent users.

• Integrated Authorize.Net payment gateway with 30+ test cases for fraud prevention. • Enhanced order processing with automation, leading to a 38% increase in processed orders and improved cus- tomer satisfaction.

• Improved multi threaded data scraping tools, enhancing daily batch performance. • Built time-sheet authorization and blob storage systems for media handling.