Experience
Senior Software Engineer & AI Engineer
March 2022 - PresentChampioning a full AI agentic workflow using Claude Code in a poly-repo environment of 42+ microservices, serving as a Scrum Master, and leading full-stack and mobile engineering.
- 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.
Software Engineer
September 2021 - February 2022Supported 1,000+ employees across the Rocket Mortgage ecosystem by building automated onboarding systems, migrating legacy systems with zero downtime, and engineering core backend refactors.
- Acted as the Subject Matter Expert (SME) for multiple internal products across the Rocket Mortgage ecosystem, supporting 1,000+ employees.
- Architected a standardized onboarding 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 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 actionable technical stories.
Software Engineer
August 2019 - August 2021Engineered high-performance, full-stack E-commerce integrations and customized data management systems (PIM, CRM) for high-volume consumer platforms.
- Engineered robust full-stack E-commerce solutions for clients like the Arbor Day Foundation, processing 10,000+ orders during peak seasons.
- Designed and implemented a custom reporting module that reduced report generation and viewing time by 50% for administrative users.
- Built custom data extensions for inRiver PIM to optimize product tracking for catalogs containing 1,000+ SKUs.
- Developed deep backend customizations for nopCommerce and EpiServer (Secura), including IP-based geolocation and business telemetry.
Teamcenter Implementations Engineer
January 2019 - July 2019Configured and maintained global Teamcenter PLM integrations, change management systems, and data synchronization pipelines for enterprise manufacturing teams.
- Orchestrated deep-level Teamcenter PLM solutions, configuring BMIDE, BOM Management, and complex Workflows for a global manufacturer.
- Streamlined change management and access control protocols, enhancing data reliability across distributed engineering teams.
- Performed complex data modeling to synchronize thousands of technical specifications, ensuring high-fidelity data migration.
- Resolved critical configuration constraints, maintaining high system availability for a massive concurrent user base.
Web Application Developer
March 2017 - December 2018Redesigned and implemented core academic advising software used by thousands of students and advisors, standardizing frontend components with reusable directives.
- Lead developer for the rewrite of the Advising Worksheet from Plone to AngularJS, radically improving user flow for 1,000s of students.
- Developed mission-critical software utilized by 15+ professional advisors to manage academic graduation plans university-wide.
- Engineered a library of reusable AngularJS directives that standardized dynamic form creation and accelerated future development.
- Authored comprehensive technical documentation in Confluence to ensure project continuity and a seamless handoff.
Research Assistant
Jan 2017 - May 2017Developed custom NLP applications in Python to automate high-volume data extraction and linguistic text summarization.
Key Projects
Dispatch React Native, React, Claude, GitHub Copilot, .Net Core, CosmosDB
- Mission-critical insurance platform processing 500-1,000+ daily tasks and assigning to 1,000+ resources.
- Leveraged AI architectural assistants to hyper-accelerate core mobile feature implementation and CI/CD automation.
Resource Manager Angular, Jasmine, .Net Core, Azure DevOps, SQL
- Centralized resource management tool supporting internal company-wide operations.
- Led front-end UI development and automated deployments to multi-tier environments within Azure DevOps.
Checkmate .Net Framework, jQuery
- Legacy system migration orchestrating massive production deployments with zero downtime via Azure DevOps.
VendorDocs .Net Framework
- Authored comprehensive unit tests extending application coverage safely beyond 85%.
- Refactored core business logic to process newly structured CSV files over legacy models.
Arbor Day Foundation nopCommerce
- High-traffic E-commerce platform processing 10,000+ orders during peak seasonal periods.
- Integrated IPGeolocation APIs and Google Analytics for advanced business telemetry.
Other Projects
Advising Worksheet AngularJS, Plone
- Streamlined graduation planning for thousands of students and 15+ advisors at UW Oshkosh.
- Architected reusable components and comprehensive documentation for long-term project sustainability.
Portfolio Website Hugo, Antigravity
Personal portfolio website (https://justinlespiritu.com)
- Architected a high-performance, data-driven portfolio using Hugo and Antigravity-assisted development.
- Implemented premium, metric-heavy resume layouts and automated PDF generation workflows.
boulderLeague Flutter, Claude, Firebase
- Rapidly prototyped a robust mobile application using Claude as an AI architectural assistant.
- Implemented a scalable, real-time database architecture utilizing Firebase for user progression tracking.