Leejay Hsu
Leejay Hsu
Software Engineer
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Professional Experience
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Professional Experience

Tensec

  • Architected and deployed AWS-based backend infrastructure for containerized applications, establishing core platform scalability
  • Built a double-entry ledger system processing millions in transaction value
  • Led AI adoption initiatives that accelerated development velocity, including CLI agent workflows and automated CI-based code reviews
  • Developed an LLM-powered Slack agent powered by an in-house MCP serving as the company's intelligent knowledge base, reducing information retrieval time
  • Building agentic AI features to automate compliance risk review, significantly reducing manual transaction oversight
Technologies & tools
TypeScript
Python
FastAPI
NestJS
Next.js

Cushion.ai

  • Drove full-stack development for consumer personal finance platform, with emphasis on backend architecture
  • Integrated 3D Secure authentication into onboarding flow, dramatically reducing fraudulent user acquisition
  • Architected multi-payment method management system, enhancing user flexibility and platform payment capabilities
Technologies & tools
Python
Django
PostgreSQL

Carta

  • Developed fund administration platform features for venture capital accounting workflows, serving hundreds of accounting professionals
  • Automated repetitive accounting workflows, eliminating email-based manual processes and improving operational efficiency
  • Delivered end-to-end feature development from database design through REST APIs to responsive frontend components
Technologies & tools
Python
Django
PostgreSQL

Bond Financial Technologies

  • Architected microservices for critical financial operations including identity validation, ACH payments, and card issuance
  • Implemented comprehensive observability infrastructure with metrics and dashboards, ensuring 99.9%+ service reliability
  • Pioneered Bond's direct NACHA integration for ACH file transmission, establishing foundational payment infrastructure
Technologies & tools
Python
Flask
Django
FastAPI