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Josiah Ortiz

@josiahortiz

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Senior full-stack engineer specializing in AI-driven systems, cloud-native architectures, and scalable products.

United States

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What I'm looking for

I seek senior engineering roles building production AI/cloud-native systems with strong engineering culture, mentorship, and impact-driven product work.

I am a Senior Full-Stack Engineer with 10+ years building scalable, high-performance applications across AI, healthcare, FinTech, and IoT. I design cloud-native architectures, production ML/AI pipelines, and robust microservice platforms while driving CI/CD, observability, and security best practices.

At multiple companies I led end-to-end product deliveries — deploying AI self-checkout kiosks at scale, building FinTech analytics and recommendation engines, and constructing data annotation and 3D asset pipelines — consistently improving throughput, uptime, and operational efficiency.

I mentor engineers, champion TDD and clean architecture, and collaborate with product and design to translate business needs into reliable, production-ready systems that accelerate time-to-value and improve user experience.

Experience

Work history, roles, and key accomplishments

Current

Staff Software Engineer

Current

Mashgin

Jul 2023 - Present (2 years 5 months)

Led end-to-end deployment of AI-powered self-checkout kiosks across 100+ locations, increasing throughput up to 80% and revenue by 25%; built real-time analytics dashboard and optimized YOLOv7 inference on NVIDIA Jetson to reduce latency 15%.

Python fastAPI React AWS Kubernetes YOLOv7 Prometheus Stripe

Senior Full-Stack Engineer

Sigma.AI

Jul 2021 - Jun 2023 (1 year 11 months)

Designed and implemented an AI-powered financial analysis and recommendation platform, delivering real-time portfolio analytics and advisor personalization that improved decision-making speed and client engagement.

Python Ruby on Rails React MongoDB Elasticsearch NLP TensorFlow AWS CI CD

Full-Stack Engineer

Flatiron Health

Feb 2018 - Jun 2021 (3 years 4 months)

Implemented and scaled OncoEMR serving 1,500+ oncologists and built a clinical trial matcher using NLP and Elasticsearch, increasing trial enrollment by 12% and achieving 99.6% platform uptime.

Ruby on Rails React PostgreSQL Elasticsearch FHIR Docker CircleCi HIPAA

Software Engineer

Comcast Corporation

Jun 2015 - Jan 2018 (2 years 7 months)

Contributed to Xfinity TV app and content recommendation systems, improving API response times 25% and personalization-driven engagement by 12% while supporting 20M+ customers.

Java AngularJS Apache Spark Elasticsearch AWS EC2 Selenium REST APIs

Software Engineering Intern

Air Products and Chemicals, Inc

May 2013 - Aug 2013 (3 months)

Developed a supply chain monitoring dashboard and predictive maintenance prototype, improving tracking efficiency 15% and forecasting equipment failures with 80% accuracy during internship projects.