Junyu Li

SafeClick — Hempstead, NY

Lead Software Engineer (Applied AI & Security) · April 2025 – Present

  • Designed and engineered a multi-stage AI-powered phishing detection system (URL structure analysis → sandbox evidence → LLM-assisted interpretation) to systematically reduce false negatives in zero-day attack scenarios.
  • Implemented deterministic, code-enforced risk scoring and schema-constrained validation (Pydantic) to bound probabilistic LLM outputs and preserve security guarantees.
  • Architected domain reputation caching and scan-job deduplication, reducing inference latency and API costs under concurrent workloads.
  • Led a 5-engineer team through full-stack integration, evolving the system from a hackathon prototype into a production-oriented security service.

Belle SPA Inc — Huntington, NY

IT Support Specialist · On-Prem AI Deployment · May 2023 – Present

  • Designed and deployed a local LLM-based translation tool using Ollama to support daily customer communication for a non-technical team.
  • Configured on-prem model inference on idle in-house hardware to reduce reliance on paid SaaS translators and keep sensitive business data internal.
  • Managed system setup, deployment, and reliability improvements based on real operational use, balancing cost, latency, and operational simplicity.
  • Maintained core office IT infrastructure (networking, CCTV, routers, Wi-Fi, devices) to ensure uninterrupted operations.

L&J SPA Inc — Commack, NY

IT Support Specialist · September 2019 – January 2023

  • Maintained networking, Wi-Fi, and CCTV infrastructure to ensure uninterrupted business operations.