Joshua Marinez
@joshuamarinez
Senior software engineer building scalable web platforms and distributed healthcare systems.
United StatesWhat I'm looking for
I’m a Senior Software Engineer with 8+ years of experience building large-scale web platforms and backend systems. My strength is designing distributed systems and delivering reliable software at scale across healthcare and fintech.
At McKesson, I led development of healthcare supply chain platforms serving 10,000+ providers and pharmacies. I designed backend services for millions of daily medical orders, improved order processing latency by 35% with Redis caching and Kafka-based event pipelines, and reduced deployment time by 40% by defining CI/CD pipelines in Jenkins.
I’ve also built and evolved production APIs and data workflows, including REST/GraphQL services and Python-based ML productionization for demand forecasting. I partnered with data science teams to expose AI predictions through APIs, built data pipelines for training and inference, and implemented role-based access control to meet HIPAA and internal compliance standards.
Previously at Stripe, I developed payment and billing services supporting millions of transactions per day, implemented GraphQL APIs, and improved payment retry logic by reducing failed transactions by 18%. Earlier at Cardinal Health, I delivered healthcare inventory and logistics applications across frontend and backend, automating reporting and reconciliation in Python while collaborating across QA and business teams.
Experience
Work history, roles, and key accomplishments
Led development of healthcare supply chain platforms serving 10,000+ providers and pharmacies, designing backend services to process millions of daily medical orders with high availability. Improved order processing latency by 35% using Redis caching and Kafka-based pipelines, and reduced deployment time by 40% by defining Jenkins CI/CD.
Built payment and billing services supporting millions of transactions per day, developing scalable backend systems with Ruby on Rails, Java, and Go. Improved payment retry logic to reduce failed transactions by 18% and implemented GraphQL APIs with Kafka/RabbitMQ-based asynchronous processing.
Built payment and billing services supporting millions of transactions per day by developing scalable backend systems in Ruby on Rails, Java, and Go. Improved payment retry logic, reducing failed transactions by 18%, and implemented GraphQL APIs with Kafka and RabbitMQ for reliable asynchronous processing.
Developed healthcare inventory and logistics applications used across multiple distribution centers, building frontend features with Angular and React and backend services with .NET, Java Spring Boot, and Node.js. Reduced manual processing by automating Python report and reconciliation jobs and supported operational data with MongoDB and PostgreSQL.
Developed healthcare inventory and logistics applications used across multiple distribution centers, building frontend features with Angular/React and backend services with .NET, Java Spring Boot, and Node.js. Reduced manual processing by automating Python report/reconciliation jobs and improved reliability with unit and integration testing.
Education
Degrees, certifications, and relevant coursework
University of Texas at Dallas
Bachelor of Science, Computer Science
2013 - 2017
Bachelor of Science in Computer Science at the University of Texas at Dallas from 2013 to 2017.
University of Texas at Dallas
Bachelor of Science in Computer Science, Computer Science
2013 - 2017
Bachelor of Science in Computer Science from the University of Texas at Dallas from 2013 to 2017.
Tech stack
Software and tools used professionally
Availability
Location
United StatesAuthorized to work in
Job categories
Skills
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