Le Phuong Tay

Professional Summary

Full-Stack Ruby on Rails Engineer with 4 years of experience building scalable SaaS applications. Architected workflow engines, integrated AI capabilities, and delivered end-to-end solutions from database design to production deployment. Proven track record leading development teams at Japanese tech company (SUN* Inc.) and shipping complex features for healthcare platforms.

Technical Skills

Backend & Frameworks

Ruby on Rails (4 years), Ruby, ActiveRecord, GraphQL, RESTful API, Sidekiq

Database & Storage

PostgreSQL, MySQL, DynamoDB, Redis, AWS S3

Frontend & UI

JavaScript, TypeScript, React, Hotwire/Stimulus, Tailwind CSS

DevOps & Tools

Docker, AWS (S3, EC2, Lambda, SNS, SES), Git, CI/CD, RSpec/TDD

Professional Experience

TINYpulse by WebMD Health Services

2024 - Present

Tech: Ruby on Rails, ReactJS, PostgreSQL, Microservices, Redis

Develop new features for employee engagement platform using Rails + React microservices architecture
Optimize application performance through code refactoring and database query optimization
Resolve technical debt improving system maintainability and test coverage
Collaborate with cross-functional team on full-stack development initiatives

SUN* INC. (Japanese Tech Company)

Feb 2022 - Dec 2023

Tech: Ruby on Rails, NodeJS, TypeScript, MySQL, DynamoDB, AWS (S3, SNS, SES, Lambda), OAuth

Led development of healthcare applications for Japanese clients, extending project from 2 months to 1 year
Mentored team of 4 developers; managed task assignments and conducted code reviews
Integrated third-party APIs (Fitbit, Google Fit, Amazon Gift Cards) for health monitoring features
Designed efficient database structures for MySQL and DynamoDB single-table design
Implemented OAuth authentication and RESTful APIs for secure integrations

Freelance Projects (Upwork)

Novalexi - IP Management SaaS Platform

2024 - Present

Role: Solo Backend Developer (End-to-End) | Client: Arabic Organization

Tech: Ruby on Rails, PostgreSQL, AWS S3, SendGrid, AI (ruby_llm)

Architected and built complete Intellectual Property management SaaS from scratch
Designed Workflow Engine with hydration templates for complex automation pipelines
Integrated AI capabilities using ruby_llm enabling intelligent chat and data analysis
Implemented file management (S3) and transactional email system (SendGrid)
Planning multi-tenant SaaS expansion architecture

Feedback Robot - Survey & Feedback Platform

2023 - 2024

Role: Solo Backend Developer (End-to-End)

Tech: Ruby on Rails, PostgreSQL, Webhooks, Third-party APIs

Built Workflow Engine supporting third-party and webhook event triggers
Designed flexible survey system with customizable question types
Implemented real-time event processing via webhook integrations

Education

Saigon University

Bachelor's in Information Technology | GPA: 3.0

Oct 2018 - May 2023

Full-Stack Ruby on Rails Engineer