About Me
Full Stack Developer with 3+ years of experience specializing in backend systems, microservices, and distributed architectures. Proficient in Node.js, React, and cloud platforms (AWS/GCP), with a focus on designing scalable APIs, optimizing database performance, and building event-driven services. Experienced in containerization, CI/CD pipelines, and cloud-native deployments to deliver resilient, high-performance applications.
When I'm not coding, you'll find me strategizing over a chess board, solving algorithmic puzzles, or enjoying competitive gaming. I'm passionate about continuous learning and love tackling complex problems both in code and in my hobbies.
My Cats
Yumi
The feisty princess
Mogu
The energetic zoomer
Yumi & Mogu
The dynamic duo together
Professional Journey
My career progression and educational background, showcasing growth and continuous learning in software development and technology.
Software Engineer
Designed and implemented scalable solutions for Alexa services, focusing on LLM optimization, infrastructure automation, and user engagement features.
Key Responsibilities
- Designed and implemented emoji reactions on Alexa announcements
- Provisioned multi-region AWS infrastructure with CDK for Alexa Plus LLM Messaging
- Optimized LLM prompts with token compression and chaining techniques
- Developed instruction sets for Alexa LLM Messaging API routing
- Built RESTful APIs for microservice orchestration and response formatting
- Migrated legacy resources to AWS using Infrastructure as Code (CDK)
- Implemented automated integration testing on code reviews (TestOnCR)
Key Achievements
- Increased user engagement by 30% per announcement through emoji reactions feature
- Created reusable deployment model adopted by 3+ Alexa teams
- Reduced LLM input size by 80% (10k → 2k tokens), cutting inference costs 70-80%
- Improved LLM response latency from 600ms to 150ms
- Eliminated API misrouting across millions of daily invocations
- Reduced biweekly release effort from 3 hours to <30 minutes through automation
- Resolved month-long pre-prod outage, restoring 1-2 biweekly releases and unblocking 4+ launches
Technologies Used
Software Engineer
Developed healthcare software solutions focusing on pharmacy applications and patient experience improvements.
Key Responsibilities
- Designed and launched smart pharmacy search feature with preference-based filtering
- Revamped Android/iOS pharmacy apps by modernizing Hyperspace integrations
- Diagnosed and resolved core crash issues in Hyperspace ambulatory pharmacy modules
- Collaborated with healthcare providers to align mobile UX with enterprise desktop features
- Implemented patient-focused features to improve pharmacy selection experience
- Maintained and enhanced existing healthcare software modules
Key Achievements
- Successfully launched smart pharmacy search improving patient pharmacy selection
- Reduced mobile app crash rates through Hyperspace integration modernization
- Improved reliability of ambulatory pharmacy modules used by healthcare providers
- Enhanced mobile user experience alignment with enterprise desktop workflows
- Delivered patient-centric features that improved overall healthcare experience
Technologies Used
Bachelor of Science in Computer Science
Relevant Coursework
Doctorate of Pharmacy in Pharmacy
Relevant Coursework
Bachelor of Science in Mathematical Biology
Relevant Coursework
ProjectsCase Studies
Explore my portfolio of web applications, mobile apps, and development tools. Each project showcases different technologies, challenges overcome, and solutions implemented.
7 projects found
Advanced Portfolio Website
A modern, interactive portfolio website built with Next.js 15, featuring advanced animations, responsive design, and comprehensive project showcases.
LeagueScout
A scalable system to process live Riot Client data and deliver personalized teammate performance analysis directly to Discord channels.
Alexa Plus @ Alexa
AI-powered premium Alexa service featuring advanced LLM integration, personalized responses, and enhanced conversational capabilities for premium subscribers.
Fantasy Football Real-Time Platform
A real-time fantasy football platform built with PHP/Phoenix, featuring WebSocket communication, live updates, and PostgreSQL database integration.
Emergency Calling @ Alexa
Critical emergency calling service for Alexa devices, enabling voice-activated emergency calls with location services and emergency service integration.
Emergency Contacts @ Alexa
Voice-activated emergency contact management system for Alexa, enabling users to store, manage, and quickly access emergency contacts through voice commands.
Roadside Assistance @ Alexa
Roadside assistance service for Alexa, enabling voice-activated emergency roadside support with location services and partner integration (service deprecated).
SkillsExpertise
A comprehensive overview of my technical skills, proficiency levels, and certifications. Click on categories to explore detailed information about each skill.
Skill Cloud
Skill Categories
Core programming languages and syntax mastery
Frontend and backend frameworks, libraries, and tools
Database design, optimization, and management
Cloud services, deployment, and infrastructure
Development workflow, version control, and tooling
Communication, leadership, and collaboration abilities
Contact
Get In Touch
Get in Touch
davidyu12496@gmail.com
Location
Chicago, IL