Hassan Raza

Built and scaled fintech systems processing $1B+ annually across payments, data pipelines, and AI-driven analytics

• Designed and implemented backend systems supporting high-volume donation processing across ACH, cards, stock, crypto, and donor-advised funds
• Built large-scale data ingestion and migration pipelines for external platforms, handled over 10M+ records with validation and deduplication
• Developed AI-driven analytics features enabling natural language queries over multi-tenant financial datasets with strict safety guardrails
• Architected event-driven systems using queues and background workers to ensure reliability, retries, and observability
• Improved system scalability and maintainability through modular architecture and clear service boundaries

Improved LLM reliability through structured evaluation, edge-case analysis, and feedback-driven workflows

• Evaluated AI-generated code and system outputs to identify correctness issues, inconsistencies, and edge cases
• Provided structured feedback to improve model performance, reliability, and response quality
• Worked on workflows connecting human evaluation with model improvement cycles
• Refined prompts and evaluation criteria to reduce ambiguity and improve output consistency
• Collaborated in fast-paced environments focused on improving real-world AI system behavior

Built distributed backend systems supporting a global hiring platform serving 1.5M+ users

• Developed scalable backend services for Amazon’s hiring platform impacting over 1.5 million hourly workers
• Built and maintained core infrastructure using Java, Node.js, and AWS services
• Improved system reliability and availability through monitoring, logging, and fault-tolerant design
• Contributed to CI/CD pipelines and deployment automation ensuring stable and frequent releases
• Collaborated across teams to deliver high-impact features in a large-scale distributed environment

Led development of ERP, marketplace, and SaaS platforms with focus on scalability and system design

• Designed and developed full-stack applications including ERP systems and marketplace platforms
• Built scalable backend services using Java, Spring Boot, and Node.js
• Implemented secure authentication and authorization systems
• Deployed and managed cloud infrastructure on AWS ensuring high availability
• Mentored junior developers and contributed to architectural decisions across projects

Developed and maintained web platforms and internal systems with focus on performance and usability

• Built and maintained company websites using PHP, WordPress, HTML, CSS, and JavaScript
• Contributed to internal HR platform development using PHP and Laravel
• Improved website performance and optimized user experience
• Collaborated with cross-functional teams on design, development, and testing
• Handled bug fixes, maintenance, and system enhancements