# Jason L

> Senior Software Engineer at Shopify

Location: Marco Island, Florida, United States
Profile: https://flows.cv/jasonl1

With 10+ years in software development, I've built and maintained large-scale systems at Shopify, GitHub, and Aflac. My main tools are Ruby on Rails, PostgreSQL, and GraphQL. I've worked on improving system speed, API response times, and handling large data sets. I focus on building dependable solutions for complex business needs and making life easier for other developers by improving workflows and app performance.

## Work Experience
### Senior Software Engineer @ Shopify
Jan 2022 – Present | United States
- Built a checkout processing service in Ruby with controlled concurrency, allowing faster parallel transactions & cutting payment delays during peak hours by 35%. Also reduced database deadlock issues.  
- Created a frontend customization system using React + TypeScript. Shifted Shopify's storefront editor to a dynamic model, which helped cut UI error reports by 25%.  
- Improved GraphQL API speed by batching resolver calls & removing repeated field evaluations  -  boosted response time by 40% & made the merchant dashboard quicker.  
- Made PostgreSQL queries faster for sales analytics by using indexed materialized views & preloading commonly used data. Dropped report load time from minutes down to seconds.  
- Set up a CI/CD pipeline with Jenkins + AWS. Changed how artifacts & DB migrations are deployed, making rollouts more reliable & cutting rollback cases by 30%.

### Full Stack Engineer @ GitHub
Jan 2018 – Jan 2022 | United States
- Built a distributed webhook system using Ruby on Rails, PostgreSQL & AWS SQS to support async event handling, letting millions of 3rd-party integrations receive webhooks without delay.  
- Created an API request queue with Redis caching & backpressure control to keep response times stable during large spikes in repo activity.  
- Improved PostgreSQL queries & indexing for GitHub's internal repo metadata, cutting execution time by 50% & speeding up repo search & navigation.  
- Tuned Sidekiq worker allocation across AWS regions to scale background jobs better, cutting task delays for events like issue tracking & repo updates.  
- Made repo permission checks faster by using recursive queries & connection pooling in PostgreSQL, bringing down response times by 35% on big enterprise accounts.  
- Reworked GitHub’s GraphQL API to support deferred execution, reducing heavy-query load on the primary DB without affecting data accuracy.  
- Built auto-rollback support into Jenkins-based CI/CD pipelines, allowing quick fault detection & fast rollback of failed API deployments.

### Software Engineer @ Aflac
Jan 2015 – Jan 2018
- Built policy transaction handlers in Aflac's monolithic Rails app, moving from direct DB writes to async job-based updates. This cut batch update time by 40% during peak policy renewals.  
- Swapped out flaky cron jobs with Sidekiq-based async jobs, using structured retries & a dead-letter queue for better handling of mass policy updates.  
- Replaced older SOAP services with REST APIs, introducing consistent data formats to fix mismatches across internal calls.  
- Set up a Jenkins-based deployment flow with staged rollouts & auto rollback checks to reduce production issues from manual steps.


## Education
### Bachelor's degree in Computer Science
Texas Tech University
Jan 2011 – Jan 2015


## Contact & Social
- LinkedIn: https://linkedin.com/in/jason-l-3a3982365

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Source: https://flows.cv/jasonl1
JSON Resume: https://flows.cv/jasonl1/resume.json
Last updated: 2026-03-22