Open to opportunities

Jack Doyle

@jackdoyle

Message

Senior ML engineer specializing in LLM systems, RAG pipelines, and production-grade AI automation.

Ireland

Message

What I'm looking for

I seek a technical leadership role developing production-grade LLM and AI systems with strong MLOps, observability, and cross-functional collaboration, preferably in healthcare or enterprise.

I am a Senior ML Engineer and LLM specialist with extensive hands-on experience designing and deploying Multi-Agent Systems, RAG-based pipelines, and LLM-driven automation across healthcare and enterprise domains. I bridge research and engineering by fine-tuning open-source LLMs (QLoRA, DPO), building agent orchestration frameworks with LangChain/LangGraph/LangSmith, and delivering production-ready, scalable AI products.

My career highlights include leading end-to-end healthcare AI projects, building scalable AI research platforms with dual-LLM integrations and FastAPI–WebSocket architectures, and deploying customer-facing solutions such as chatbots backed by Neo4j graph knowledge bases. I prioritize observability, evaluation (Ragas, A/B testing), and robust MLOps to ensure reliable, high-impact outcomes for stakeholders.

Experience

Work history, roles, and key accomplishments

LLM Specialist & ML Engineer

Tiger Analytics

May 2023 - Oct 2025 (2 years 5 months)

Led end-to-end development of healthcare AI systems, building multi-agent LLM workflows and RAG pipelines that improved research automation and production reliability; fine-tuned open-source LLMs and delivered customer-facing chatbots with graph-structured reasoning.

LLM LangGraph fastAPI QLoRA DPO Neo4j Evaluation A B Testing

Data & AI Engineer

Mercari

Jul 2021 - May 2023 (1 year 10 months)

Implemented MLOps pipelines and production model deployments on EKS, developed recommendation systems that increased engagement 9% and sales 12%, and built PySpark ETL pipelines to produce high-value features for ML models.

Kubeflow MLFlow EKS Pyspark Elasticsearch TensorFlow Recommendation Systems

AI & Web3 Engineer

Token Metrics

Apr 2019 - Jul 2021 (2 years 3 months)

Built automated ETL pipelines ingesting DeFi on-chain data and deployed forecasting models on SageMaker with canary strategies; developed real-time crypto market intelligence dashboards and resilient microservices on Kubernetes.

Snowflake Apache Spark Kafka AWS Sagemaker Docker Kubernetes ETL

Full Stack Developer

Cloudera

May 2017 - Mar 2019 (1 year 10 months)

Developed features for a high-performance e‑commerce SaaS, led migration from monolith to microservices using Kafka, and implemented CI/CD and IaC to streamline deployments and ensure compliance with global payment standards.

Python Apache Kafka Docker GitHub Actions Terraform EKS