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Joseph Casilang

@josephcasilang

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Senior AI Software Engineer building HIPAA-compliant, low-latency LLM and multimodal systems.

United States

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What I'm looking for

I want to build HIPAA-compliant, low-latency AI products—LLM/RAG, multi-agent orchestration, and multimodal pipelines—where Zero Trust security and measurable results like uptime, cost, and faster releases are non-negotiable.

I’m a Senior AI Software Engineer specializing in high performance, HIPAA compliant AI systems, multi agent orchestration, and enterprise scale multimodal pipelines. I architect production LLM platforms with sub 120ms latency, 99.995% uptime, and measurable outcomes like 40% cost reduction across healthcare and retail environments.

Across my roles, I’ve built hybrid semantic search engines, dynamic model routing frameworks, and GPU autoscaling clusters serving 50,000+ users and processing 2M+ daily clinical and retail events. I also lead Zero Trust AI security initiatives and SOC2/NIST-aligned PHI safe pipelines, while modernizing CI/CD for faster, more reliable releases.

Experience

Work history, roles, and key accomplishments

Senior AI Software Engineer

Roger Healthcare

May 2024 - Apr 2026 (1 year 11 months)

Architected a multi-agent clinical AI platform using LangGraph + MCP for autonomous documentation, triage, and care plan generation. Built hybrid semantic search and multi-cloud LLM routing with Zero Trust AI security, and delivered real-time STT→LLM→TTS agents.

Senior Full Stack Engineer

NextGen Healthcare

Jul 2021 - Apr 2024 (2 years 9 months)

Built enterprise-grade RAG assistants for clinical workflows and improved documentation accuracy and follow-up edit reduction. Developed multimodal pipelines, a Kafka-based distributed scheduling engine, multi-cloud inference routing, and clinician dashboards with real-time updates.

RAG Assistants Kafka fastAPI Redis Azure OpenAI Multi Cloud Inference Routing React Next.js WebSockets Dashboards Clinical Data Model Migration

Full Stack Engineer

Carmatec

Jun 2018 - Jun 2021 (3 years)

Developed retail + healthcare AI automation systems integrating RAG pipelines and multimodal search into customer dashboards. Built event-driven inventory pipelines and modernized infrastructure while also delivering internal analytics dashboards and mentorship.

Multimodal Search DynamoDB Kafka Event Driven Architecture Docker React Next.js PostgreSQL Mentorship

Frontend Developer

Carmatec

May 2016 - Jun 2018 (2 years 1 month)

Built high-performance React/TypeScript dashboards with real-time WebSocket updates and reusable UI component libraries. Implemented performance optimizations such as lazy loading and bundle splitting to reduce load times.

React TypeScript WebSockets Component Libraries Lazy Loading Bundle Splitting Performance Optimization