About Me
Software Engineer based in Raleigh, NC
About#

Currently, I work at IBM as a QA/Test Developer and member of the z Platform Evaluation Team (zPET), where I lead cross-functional teams in building agentic solutions for z/OS systems. My work focuses on bringing modern AI capabilities to enterprise mainframe systems and testing them against our quality standards
For fun, I like to lift weights, train Brazilian Jiu-Jitsu, read books or play games.
Journey#
My career at IBM began in 2020 as an intern while pursuing my Computer Science degree at Siena College. After an extensive screening process—including multiple interviews over several months and a three-hour technical examination—I joined IBM’s database squad, helping companies store and manage data at scale while maintaining security and integrity. IBM extended my internship through graduation and offered me a full-time position upon completing my degree.
Since then, I’ve progressed from intern to architect roles, focusing on z/OS systems and pioneering AI integration within IBM Z. I apply data structures and algorithms to solve complex technical challenges, develop custom web crawlers for generative AI applications, and bridge the gap between technical teams and business stakeholders.
Experience#
IBM - QA/Test Developer (10/2024-Present)
- Leading z/OS engineers in building agentic solutions for z/OS Dump Management, accelerating enterprise AI adoption
- Architecting and deploying multi-modal RAG systems using Python, FastAPI, Bee AI, and Docling, processing diverse data sources including videos, PDFs, runlogs, and GitHub wikis
- Drove automation initiative reducing manual regression testing costs by 88% through Galasa, Ansible, and Jenkins implementation
- Facilitated and administered IBM Cloud account infrastructure for executive-level AI projects, developing access management processes and monitoring solutions
- Orchestrated seamless migration of AI applications between cloud accounts handling PII/SPI data with zero service interruption
IBM - Technical Architect (12/2023-10/2024)
- Spearheaded end-to-end development of AskiCDNet for IBM Client Delivery Network (iCDNet)
- Architected and implemented generative LLM-powered RAG solution using Langchain, Milvus, watsonx.data and watsonx.ai
- Led strategic migration from Java monolith to Python microservices architecture, improving scalability and maintainability while ensuring security compliance
- Mentored engineering team on development best practices and modern architecture patterns
IBM - ML Engineer (12/2022-12/2023)
- Designed CI/CD pipelines for AskiCDNet digital worker platform using watsonx Assistant and Cirrus
- Developed Java Spring Boot REST API middleware integrating ServiceNow, Palo Alto Prisma, and other third-party APIs for advanced customer support
- Improved system performance by 40% through strategic caching and query optimization, enhancing user experience across the platform
IBM - Software Developer (July 2021 - December 2022)
- Designed and developed REST APIs using Node.js and Express.js, enabling seamless integration with z/TPF systems
- Created a VSCode extension for the z/TPF Learning Platform, providing an innovative solution for remote z/TPF development in C/C++
- Implemented unit tests and adhered to best practices to maintain high code quality, ensuring reliability and stability
- Facilitated team retrospectives in agile meetings, promoting a culture of continuous improvement
- Promoted to Band 6
IBM - Backend Development Intern (June 2020 - July 2021)
- Developed features in C for the middleware & security squad that helped increase SSL security
- Implemented a MongoDB security interface in C++ for the database squad, improving role-based access control user experience
- Learned z/TPF operating system development
- Location: Poughkeepsie, New York
- Extended internship through graduation, leading to full-time offer
Education#
Siena College - B.S. Computer Science, Minor in Entrepreneurship (2017-2021)
- GPA: 3.5/4.0
- Honors: President’s List Spring 2019, Dean’s List Fall 2020, Dean’s List Spring 2020
- Member: Upsilon Pi Epsilon (Computer Science Honor Society)
- Celebration of Academic Excellence Certificate
- Served as project manager for capstone course developing a website for a high school programming contest
- Research Assistant (Nov 2019 - Apr 2020): Developed Java frontend with Swing/JavaFX for novel AI implementation in conjunction with GE and Department of Defense, visualizing AI decisions over time
- Teaching Assistant (Sep 2018 - Apr 2019): Assisted with Java and GameMaker classes, troubleshot student code
- ITS Student Consultant (Aug 2019 - Nov 2019): Troubleshot technical issues ranging from networking to hardware
- Competed in Ludum Dare, a 48-hour game competition
- Practiced competitive programming on HackerRank and LeetCode
- Built cross-disciplinary apps combining business and technical perspectives
Saint John Vianney High School (2013-2017)
Skills#
Top Skills: Python, Jenkins, Linux, IBM Cloud, and z/OS
Technical Stack: IBM Cloud, z/OS, z/TPF, Machine Learning for z/OS (MLz), AI System Services on z/OS, Watsonx Assistant for Z (WXA4Z), Go, Python, C, C++, Linux, Watsonx, Langchain, RAG, DevOps, Docker, Kubernetes, Postgres, MongoDB, REST APIs, Ansible, Java, Node.js, Express.js, React, Git/GitHub, Cirrus, Galasa
Languages: English (Native), Spanish (Elementary)
Certifications#
- IBM Agile Explorer Badge
- IBM Consulting Generative AI Foundations
- Python for Data Science Badge
Patents & Innovation#
I hold several patents through IBM invention disclosures and mentor engineers in intellectual property development and the patent submission process, fostering innovation across teams.
Early Career & Teaching#
Before joining IBM full-time, I gained diverse experience in software development and education:
Black Rocket Productions - Technical Customer Support Specialist (May 2019 - Aug 2019)
- Developed proprietary software to automate cloud computers through the Paperspace API
- Provided quality assurance for software and courses in schools across the United States
- Debugged, tested, and corrected student and instructor code in various programming languages
- Supervised instructors across the country
Black Rocket Productions - Assistant Instructor (June 2018 - Aug 2018)
- Taught students game development, app development, and multiplayer games
- Facilitated a safe, fun, and educational atmosphere during camp hours
Projects & Community#
I maintain an active presence on GitHub with 26 public repositories, showcasing work in Java, Go, Python, C/C++, and web technologies. Notable achievements include being an Arctic Code Vault Contributor and earning Pull Shark recognition.
Currently learning Go and exploring emerging technologies across various domains. I develop custom web crawlers for generative AI applications and apply data structures and algorithms to complex technical challenges.
Connect#
- LinkedIn: linkedin.com/in/justin-largo
- Twitter/X: @justinlarg0
- GitHub: @jlargs64