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Josiah Aviles
Senior AI/ML Software Engineer specializing in Generative AI and RAG systems
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Built and owned Alight's AI-powered Search Summary feature end-to-end, using a RAG pipeline with OpenSearch and Bedrock, and drove a 20% increase in user feedback scores. Stands out for bringing rigorous production evaluation to LLM systems via live LLM-as-a-judge monitoring, and for experience with advanced agentic architectures, hybrid search, and reranking at scale.
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Key Strengths
- owned ML/AI systems end-to-end from design through deployment and monitoring
- shipped RAG-based search summarization feature with 20% improvement in user feedback scores
- strong production LLM evaluation mindset using live LLM-as-a-judge scoring
- iterative prompt optimization with blast-radius analysis and regression evaluation
- deep search relevance expertise across semantic retrieval, hybrid search, and reranking
- balanced latency, cost, and quality tradeoffs in production AI systems
- experience building multi-agent LLM systems with orchestrator and specialized sub-agents
- applied AI features to business outcomes, including contracts won
- improved engineering workflow through AI-assisted code review and paved-path service templates
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