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Hi, my name is Juice

Justin L. Espiritu

Senior Software Engineer & AI Engineer at Cotality

Technical Lead, Agile Practitioner, and AI workflows pioneer specializing in full-stack engineering and agentic software development lifecycle (SDLC) automation. I design and scale custom MCP servers, agentic tools, and automated PR/alert workflows that serve 1,000+ enterprise engineers, while serving as a Scrum Master to maintain high-velocity, low-burnout teams.

Skills

Experiences

1
Cotality

March 2022 - Present

Senior Software Engineer & AI Engineer

March 2022 - Present

Responsibilities:
  • Serve as the Mobile Development Lead for the Dispatch application, owning the end-to-end design, implementation, and maintenance of a React Native app deployed to the Google Play and Apple App Stores.
  • Upgraded the mobile application from React Native 0.67 to the latest version and migrated to Expo to guarantee long-term maintainability and remove manual build/distribution pipelines.
  • Design, implement, and maintain backend services across 42+ microservices in a poly-repo environment, utilizing Claude Code to create and maintain CLAUDE.md workspace guidelines.
  • Leverage agentic AI workflows to generate detailed feature plans and ticket specifications; personally authoring/reviewing 50% of the plans to keep humans in the loop and prevent unchecked AI execution.
  • Developed an AI agent to analyze open Pull Requests, comparing implementation against ticket requirements and plans with a custom confidence scale to streamline code review.
  • Created an AI alert response agent that automatically generates root cause analyses (RCA) to accelerate on-call developer triage and resolution.
  • Built an AI-driven agent to flag and route stale PRs to necessary developers and product owners, reducing administrative overhead and keeping developers focused on high-priority items.
  • Created custom Claude skills, commands, and custom MCP (Model Context Protocol) servers, sharing them via an internal team marketplace (10 developers) and scaling to the broader enterprise (1,000+ engineers) to automate daily workflows.
  • Reduced average feature planning and execution cycle time from 1 week down to 1–3 days on average by standardizing agentic software engineering workflows.
  • Perform Scrum Master duties (standups, retros, grooming), optimizing Azure Boards tracking to prevent burnout and ensure balanced team workloads.
Rock Central

Sept 2021 - Feb 2022

Contract Software Engineer

Sept 2021 - Feb 2022

Responsibilities:
  • Acted as a Subject Matter Expert (SME) for multiple internal products across the Rocket Mortgage ecosystem, supporting mission-critical applications used by 1,000+ employees.
  • Architected a standardized onboarding documentation system using Hugo and Git Pages, reducing new engineer ramp-up time by 50% (from 2 weeks to 1 week).
  • Led front-end UI development and automated CI/CD deployments via Azure DevOps for the Resource Manager platform.
  • Orchestrated large-scale production migrations for legacy .NET systems (Checkmate), ensuring high availability and zero-downtime transitions.
  • Engineered a core logic refactor for VendorDocs, implementing a testing suite that increased unit test coverage to 85%+.
  • Collaborated with business owners and “Guardians of Quality” to establish strict coding standards and translate complex requirements into actionable technical stories.
2
3
Aperture Labs LLC

Aug 2019 - Aug 2021

Software Engineer

Aug 2019 - Aug 2021

Responsibilities:
  • Engineered robust full-stack E-commerce solutions for national clients like the Arbor Day Foundation, processing 10,000+ orders during peak seasonal periods.
  • Designed and implemented a custom reporting and data visualization module that reduced report generation and viewing time by 50% for administrative users.
  • Built custom data extensions for inRiver PIM to optimize product tracking and synchronization for catalogs containing 1,000+ SKUs.
  • Developed deep backend customizations for nopCommerce and EpiServer (Secura), including IP-based geolocation and automated business telemetry via Google Analytics.
  • Worked within a tight-knit, 5-engineer team to deliver end-to-end features, from database schema design to frontend UI implementation.
Mercury Marine

January 2019 - July 2019

Teamcenter Implementations Engineer

January 2019 - July 2019

Responsibilities:
  • Orchestrated deep-level Teamcenter PLM solutions for a global manufacturing leader, configuring BMIDE, BOM Management, and complex Workflows to support large-scale operations.
  • Streamlined change management and access control protocols, enhancing the reliability and traceability of technical data across distributed engineering teams.
  • Performed complex data modeling and mapping to synchronize thousands of technical specifications, ensuring high-fidelity data migration during system deployments.
  • Resolved critical configuration and infrastructure constraints, maintaining high system availability for a massive concurrent user base of engineers and designers.
  • Partnered with solution architects to translate complex manufacturing requirements into scalable, automated PLM modules.
4
5
University of Wisconsin Oshkosh

March 2017 - December 2018

Web Application Developer

March 2017 - December 2018

Responsibilities:
  • Lead developer for the full-scale rewrite of the Advising Worksheet, migrating the platform from Plone to AngularJS to radically improve user flow and processing speed.
  • Developed mission-critical software utilized by 15+ professional advisors to manage academic graduation plans for thousands of students.
  • Engineered a library of reusable AngularJS directives that standardized dynamic form creation and accelerated development for all subsequent engineers on the project.
  • Authored comprehensive documentation in Confluence, establishing a high-standard technical foundation that ensured project continuity post-graduation.
University of Wisconsin Oshkosh

Jan 2017 - May 2017

Research Assistant

Jan 2017 - May 2017

Responsibilities:
  • Developed an automated NLP application in Python leveraging the NLTK library to perform large-scale data extraction and text summarization.
  • Implemented computational linguistics techniques to parse complex articles and generate concise summaries, significantly reducing manual analysis time.
  • Synthesized information from diverse datasets, demonstrating early expertise in building AI-assisted tools for information retrieval and processing.
6

Feature Projects

boulderLeague
Personal Project

A mobile application to maintain records of routes and track progress at the rock climbing gym. Leveraged Claude as an AI architectural assistant to rapidly prototype and construct a robust mobile application in Flutter.

personal flutter firebase claude
Dispatch
Senior Software Engineer & AI Engineer

Mission-critical insurance claim platform processing 500–1,000+ daily tasks and intelligently assigning them to 1,000+ field resources. Leveraged AI assistants to architect the notification system and automate CI/CD workflows.

professional react native .net claude copilot gemini cotality
Resource Manager
Senior Software Engineer & AI Engineer

Centralized resource management tool supporting internal company-wide operations. Led front-end UI development and automated deployments to multi-tier environments within Azure DevOps.

professional angular cotality
Engineer On-Boarding Repo
Lead Developer

Architected a standardized onboarding system using Hugo and Git Pages, identifying critical setup pain points to reduce engineer ramp-up time by 50% (from 2 weeks to 1 week).

professional hugo rock central github pages
Checkmate
Software Engineer

Legacy system migration orchestrating massive production deployments with zero downtime via Azure DevOps for critical business-critical workflows.

professional .net rock central
Arbor Day Foundation
Developer

High-traffic E-commerce platform processing 10,000+ orders during peak seasonal periods. Integrated IPGeolocation APIs and Google Analytics for advanced business telemetry.

professional .net nopCommerce aperture labs
Details
Advising Worksheet App
Lead Developer

Full-scale rewrite of a graduation planning tool for the University of Wisconsin - Oshkosh, utilized by all university advisors to manage plans for thousands of students.

professional AngularJS University
Vendor Docs
Lead Developer

Updated custom application for NDA tracking; authored comprehensive unit tests extending application coverage to 85%+ and refactored core business logic for new data models.

professional .net rock central
Secura
Developer

Helped rewrite and create deep admin customizations for Secura’s front-facing application in Epi Server, significantly reducing content update times for administrators.

professional .net aperture labs
inRiver PIM Extensions
Developer

Built custom data extensions for inRiver PIM to optimize product tracking and synchronization for catalogs containing 1,000+ SKUs.

professional .net inriver aperture labs
Portfolio Website
Personal Project

Modern, data-driven portfolio and professional resume built using Hugo and Antigravity-assisted development. Features automated PDF generation and premium, metric-heavy layouts.

personal hugo antigravity
Wedding Website
Personal Project

Created a custom wedding guest interface using Ionic and Angular 9, featuring real-time RSVP tracking and event information.

personal Angular ionic
Star
Personal Blog
Personal Project

Personal progression blog for fitness and rock climbing. This data-driven approach eventually informed the architecture of the boulderLeague app.

personal hugo
Star