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Justin Lee

Justin Lee

Senior Full Stack Engineer

Highest degree :

Bachelors

Field of study :

Computer and information science

Location :

Madison, MN

Citizenships :

American

Experience :

8 Year(s)

Countries :

United States

Gender :

Male

Sectors :

Senior Full Stack Engineer

Experience

Senior Full Stack Engineer

St. Louis,MO

Perficient

March 2023

-

August 2025

• Developed Python/Django APIs for secure patient data exchange with healthcare partners, achieving 100% HIPAA compliance and cutting manual data reconciliation by 80%. • Designed and developed a HIPAA-compliant patient portal using Next.js, React, TypeScript, and Node.js with PostgreSQL on AWS S3, tripling document processing throughput. • Built cloud-native gRPC services in Go deployed on Kubernetes (EKS), enabling seamless real-time communication across distributed systems and decreasing inter-service error rates by 40%. • Architected microservices with NestJS, GraphQL, Redis, and Kubernetes, cutting API response times by 60% and boosting checkout conversions by 12% for a retail client. • Built real-time analytics dashboards with Next.js, GraphQL, and Prisma, cutting reporting time by 40%. • Engineered Go-based microservices for high-volume claims processing (handling 1M+ daily requests), reducing average request latency by 55% and increasing overall throughput by 3x. • Implemented IaC and CI/CD pipelines, accelerating deployments by 70% (from 10 hours to 3 hours) with Terraform, Docker, and GitHub Actions. and ensuring reliable rollbacks. • Led and mentored a 7-person engineering team, coaching through pair programming and code reviews; boosted sprint delivery accuracy from 70% to 95%.

Software Developer

Seattle, WA

Slalom

March 2021

-

February 2023

• Migrated monolithic analytics platforms to AWS microservices with Docker and Terraform, cutting infrastructure costs by 30% and improving uptime. • Implemented Python-based ETL pipelines leveraging Pandas and AWS Lambda, reducing data transformation times from 4 hours to under 30 minutes. • Rebuilt legacy UI as a Next.js/React SPA integrated with GraphQL APIs, slashing page load times by 50% and improving user engagement. • Designed and deployed Go services to support a customer identity platform, handling 50K+ concurrent sessions with 91% uptime. • Developed ETL pipelines in Node.js and Python with PostgreSQL, enabling near-real-time business intelligence and shifting reports from daily to hourly delivery. • Enhanced QA automation with Cypress and Jest, reducing regression cycles by 60% and cutting production bugs by 30%. • Automated cloud-native workflows with Python scripts and Kubernetes operators, eliminating 20+ hours/month of manual ops effort. • Trained 5 client engineers on CI/CD best practices, reducing onboarding time by 25% and improving release consistency.

MentorMate

Minneapolis, MN

MN

July 2017

-

December 2020

• Delivered 10+ mobile-first web applications used by 200K+ users in healthcare, fintech, and education, ensuring WCAG accessibility compliance, building responsive PWAs with React, Vue.js, and Nuxt.js. • Built RESTful backends in Laravel and Django with MySQL/PostgreSQL databases and JWT authentication, increasing system scalability by 40% and boosting API reliability to 90% uptime. • Optimized front-end performance with Webpack code-splitting and tree-shaking, reducing bundle sizes by 45% and improving average load times from 4.5s to 2.2s. • Introduced automated testing pipelines with Jest and Cypress, cutting post-release bugs and reducing hotfix frequency by 35%.

Education

St. Cloud State University

St. Cloud, MN

St. Cloud State University

August 2013

-

May 2017

Languages
English
Speak
Very Good
Read
Very Good
Write
Very Good
Skills

JavaScript

JavaScript React NEXT.js HTML5 CSS3 Responsive UI Design WCAG 2.1 AA Accessibility Standards

Angular

Vue

Node JS

PHP

Laravel

Python

Django

Go