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Justin Ruiz - Lead Engineer | RemoteWorks

Experience

2022 — 2026

Lead Engineer

SANAMATE

Led end-to-end ownership of an AI-driven product area, partnering directly with engineering and product to define problems, test ideas, and ship improvements into production for a core user journey Designed and implemented an AI-native multi-agent AI chat system with long-term memory architecture and LLM orchestration, translating complex technical concepts into simple, intuitive interfaces for technical users Built and iterated on complex workflows with tight feedback loops, optimizing interaction details, states, and language to improve speed, control, and clarity for users Architected scalable backend systems using Node.js, GraphQL, REST APIs, and PostgreSQL with robust data modeling to support reliable, production-grade experiences Shipped cloud-native infrastructure on AWS using Kubernetes and Docker, improving deployment reliability and scalability for production workflows Implemented monorepo-based CI/CD pipelines to enable faster release cycles and rapid iteration based on real user feedback Managed a fully remote team with async workflows, structured code reviews, and sprint planning to prioritize progress over perfection and ship quickly

2019 — 2022

Senior Software Engineer

DEEL

Collaborated in fully remote Agile teams to ship and iterate on complex SaaS systems for global payroll and compliance, operating through ambiguity and real-time constraints Architected and maintained microservices using Node.js and Python, supporting production workflows across 100+ countries with a focus on reliability and scalability Developed high-performance React and TypeScript dashboards for technical and operational users, improving clarity across end-to-end journeys and key workflows Designed ETL pipelines and data modeling for financial reporting, enabling feedback-driven improvements to core operational workflows Enhanced CI/CD pipelines with Docker and Kubernetes for reliable global deployments and faster iteration cycles Mentored engineers through code reviews and async collaboration, driving consistent delivery and shared ownership of shipped work

2014 — 2018

Software Engineer

META

Built and shipped scalable React and PHP web features serving millions of users, focusing on production outcomes and end-to-end delivery Reduced frontend load times by 35% through performance optimization, improving speed and responsiveness in core user workflows Designed internal tools that improved engineering productivity and deployment efficiency, supporting tight feedback loops and faster shipping Delivered reliable, secure, scalable features by collaborating closely with cross-functional partners and iterating based on real-world constraints