Open to opportunities

Jack Markey

@jackmarkey

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Senior Full-Stack AI Engineer driving scalable AI-driven products and systems.

Ireland

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What I'm looking for

I seek roles building production AI systems and scalable full-stack products, with collaborative teams, strong engineering practices, and opportunities to lead architecture and deliver measurable business impact.

I am a result-driven Senior Full-Stack AI Engineer with over 9 years of experience building full-stack applications, AI/ML systems, and scalable architectures for both startups and enterprise clients.

I design and implement production-ready RAG pipelines, conversational AI solutions, and high-performance backends using Python, Node.js, and modern frontend frameworks to deliver measurable business impact.

My work includes leading architecture and infrastructure on AWS and GCP with Kubernetes, Terraform, and CI/CD to achieve high availability and maintainability, while reducing technical debt through pragmatic engineering choices.

I collaborate closely with product stakeholders, lead Agile processes, and translate complex technical constraints into clear business outcomes that improve operational efficiency and user experience.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack AI Engineer

Current

NineTwoThree

Mar 2022 - Present (3 years 10 months)

Developed a conversational AI mental-health chatbot and RAG pipelines that improved early intervention capabilities by 40% and built a scalable AWS EKS infrastructure with 99.9% availability. Engineered an AI-powered logistics route optimization system that doubled delivery revenue for a major provider.

Python fastAPI Kubernetes Terraform PostgreSQL React RAG

Senior Full-Stack Engineer

MosierData

Feb 2018 - Mar 2022 (4 years 1 month)

Built a global SaaS travel platform and modular 'Travel Sandbox', implemented Apollo GraphQL Federation and a company-wide React component library, improving developer efficiency by 30%. Modernized an online shopping platform migrating PHP/AngularJS to Node.js/React, reducing load times by 50%.

Node Next.js React Apollo GraphQL Storybook MySQL REST APIs Performance Optimization

Software Engineer

Roland Berger

Aug 2016 - Feb 2018 (1 year 6 months)

Led frontend development of interactive data-visualization dashboards using React and D3, and built backend ETL pipelines with Node.js, Airflow, and PySpark to enable low-latency analytics for enterprise clients.