# Justin Gregorio

> Staff Software Engineer | Ruby on Rails | Fast API | React | Analytics | AI

Location: Salt Lake City, Utah, United States
Profile: https://flows.cv/justingregorio

Diligent Staff Software Engineer with 10+ years of professional experience, specializing in full-stack scalable cloud based Web Application, Analytics and Microservice development in Ruby on Rails, React and AWS. A proven track record of building end to end features quickly in Start Up environments and scaling existing monoliths.

## Work Experience
### Staff Software Engineer @ Gregorio Consulting
Jan 2024 – Present | Salt Lake City, Utah, United States
Tech Stacks: Django, Ruby on Rails, Python, AWS, React, Node, FastAPI, Next
• Redesigned and enhanced a Django Music Therapy Web Application, increasing new user sign up rate by 40%
• Optimized Active Record queries, reducing page load times by 150%
• Resolved critical bugs in existing Rails SaaS monolith, improving access to core features by 1000s of users
• Built AI chat-bot by integrating with OpenAI API, reducing support response time to almost 0

### Staff Software Engineer @ Aumni
Jan 2024 – Jan 2024 | Salt Lake City, Utah, United States
Tech Stack: Ruby on Rails, Next.js, React, AWS Airflow, Snowflake, Tailwind
• Designed and built back-end for new data ingestion paradigm, reducing time to onboard customers from 3 weeks to 1 hour
• Integrated and standardized new Data Migration process into application, increasing stability of code that relied on data by 50%
• Mentored engineers in Ruby on Rails and provided feedback, strengthening teamwork and increasing the number of proficient Rails developers 
• Collaborated with cross-functional teams, delivering high-quality software products on schedule
• Designed and built new forms in Rails, Hotwire and React, allowing users to seamlessly summarize client legal documents

### Senior Software Engineer @ Fluxx
Jan 2022 – Jan 2023 | San Francisco Bay Area
Tech: Ruby on Rails, React, AWS SQS, Kubernetes, Terraform
• Designed and implemented new scalable SQS approach to handling asynchronous workloads, reducing job starvation by 90% 
• Managed deployments to multiple client environments using Kubernetes and Terraform, making features and fixes available to thousands of users
• Led the initiative to identify and solve several vulnerabilities in the deployment process and documented the process succinctly in confluence, reducing outages and deployment failures by 30%
• Identified and diagnosed several high priority production issues for the FLMTG legacy application, ensuring stability in the application for thousands of users
• Performed code reviews and mentored other engineers, leading to more stable and readable code

### Senior Software Engineer @ NICE
Jan 2021 – Jan 2022 | Sandy, Utah, United States
Tech: .NET, Kafka, Go, gRPC, Microservices, OpenTelemetry
• Researched OpenTelemetry and built a POC to add it to the .NET Monolith, allowing developers to trace activity between the legacy and greenfield applications
• Proposed clearer CI/CD process for multi-team environment and repository management, preventing environment specific issues and improving the fluidity of production deployments
• Integrated Schema Registry into micro-service architecture, standardizing Kafka message data 
• Identified and quickly resolved critical issues with the .NET VC legacy monolith in On-Call rotation, ensuring reliability for thousands of users

### Senior Software Engineer @ PlanSource
Jan 2019 – Jan 2021
Tech: Ruby on Rails, AWS Airflow, React, Looker, Snowflake, PostgreSQL
• Containerized the Analytics repository and created AWS cloud architecture for CI deployment, greatly simplifying deployments
• Led the redesign of the Analytics project into a mature cloud-based architecture, improving scalability by 1000% and reducing time to implement new Analytics insights by 90%
• Investigated and integrated Looker as a replacement to in-house Analytics views, empowering users and developers to generate their own BI insights from company data in 1/10th the time
• Built Demo AI integration with Alexa for Eclipse conference, increasing product visibility and attracting hundreds of new customers

### Contract Software Engineer @ NetJets
Jan 2018 – Jan 2019 | Columbus, Ohio, United States
Tech: AWS Lambda, React 
• Implemented mapping middle-ware via AWS Lambda, allowing the IJet2 scheduling system to communicate with Solver AI to generate efficient flight schedules, greatly improving Jet utilization
• Modified and implemented high performance user interfaces using React, improving usability of application

### Contract Software Engineer @ Chase
Jan 2018 – Jan 2018 | Columbus, Ohio, United States
Tech: Blue JS
• Created a new YML based configuration framework, expediting development of Self-Directed Investing Stock search pages by 1000%

### Software Engineer @ Infor
Jan 2016 – Jan 2018 | Columbus, Ohio Area
Tech: Angular V1, Spring, Hibernate, Node.js
• Implemented several high performance UIs including Comments and Redlining using Angular
• Developed a Mock IMS service with Java, Spring and Hibernate, allowing the team to locally test ION Integration

### Engineer Intern @ WebShopApps
Jan 2014 – Jan 2016 | Dublin, OH
Tech: Ruby on Rails, PostgreSQL, Coffeescript, JQuery
• Developed several high-performance UIs to the ShipperHQ eCommerce web application in Ruby on Rails and Javascript


## Education
### Bachelor's in CSE in Computer Science and Engineering
The Ohio State University
Jan 2012 – Jan 2016


## Contact & Social
- LinkedIn: https://linkedin.com/in/justin-gregorio-ror

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Source: https://flows.cv/justingregorio
JSON Resume: https://flows.cv/justingregorio/resume.json
Last updated: 2026-03-22