# Jaiyoung Choi

> Software Engineer & Technical Leader | System Design & Architecture | Distributed Systems | Backend Engineer | Java, Python, AWS | Full-Stack Capabilities

Location: United States, United States
Profile: https://flows.cv/jaiyoung

A hands-on technical leader and engineer with extensive experience delivering large-scale, high-impact distributed systems. I am skilled in translating complex business requirements into scalable, cost-effective solutions.

Proven track record of driving measurable business value:
- Architected a location services platform processing data from 4M+ mobile devices, optimizing algorithms to reduce processing time from 4 days to under 24 hours.
- Led an end-to-end distributed storage redesign for a video surveillance platform serving 40K+ users and managing 4+ petabytes of data, achieving an 18% cost reduction while improving system resilience.
- Spearheaded an ETL pipeline development using Apache Spark on AWS EMR, securing stakeholder buy-in and building the foundation for data-driven analytics capabilities.

## Work Experience
### Principal Software Engineer @ Ecosense Inc.
Jan 2020 – Present | San Jose, California, United States
- Designed and developed a scalable, serverless backend architecture using Python, AWS Lambda, and DynamoDB to power a real-time radon monitoring service
- Designed and optimized REST APIs in Python that reduced DynamoDB query costs and improved response times, directly enhancing customer satisfaction
- Successfully proposed, championed, and secured executive buy-in for a new data service platform to unlock actionable insights for customers. Now independently leading the end-to-end design and development, building the core ETL processes using Apache Spark on AWS EMR
- Developed responsive web dashboards and mobile applications using ReactJS and React Native

### IT Specialist @ NuWave Now
Jan 2017 – Jan 2020 | Libertyville, Illinois, United States
- Enhanced the in-house ERP application for order, inventory, and defective management by implementing history tracking and acknowledgment processes, resulting in reduced delays
- Designed and developed a system that provides daily statistics on advertising costs and performance, accelerating the decision-making process by 2-3 hours per day

### Manager @ SK Telecom
Jan 2015 – Jan 2017 | Seoul, South Korea
- Spearheaded the adoption of a distributed file system for a video surveillance platform managing 4+ petabytes of video data and supporting 40,000+ monthly users
- Led the full project lifecycle from PoC, architecture redesign, solution selection, testing, and migration to production deployment
- Achieved 18% reduction in storage costs and improved system resilience against failures through distributed architecture

### Staff Software Engineer, Cloud Lab. @ Samsung Electronics
Jan 2012 – Jan 2015
- Designed and developed web application servers on cloud infrastructures such as AWS and Azure
- Analyzed requirements, documented specifications, and defined REST APIs
- Led cloud-based projects including mobile phone location inference and cloud printing

### Senior Software Engineer, Digital Media Center @ Samsung Electronics
Jan 2008 – Jan 2012
- Analyzed requirements and documented specifications
- Designed architecture and defined REST APIs
- Developed web applications such as an online shopping service and a private app store

### Software Engineer, Digital Solution Center @ Samsung Electronics
Jan 2003 – Jan 2008
- Developed a packet routing server for home networking using TCP/IP socket communication, enabling seamless integration of devices.
- Designed and implemented a protocol for 3rd-party service integration.
- Applied cryptography solutions to strengthen communication security and AOP (Aspect-Oriented Programming) techniques to improve modularity and maintainability.


## Education
### B.S. in Electrical and Electronics Engineering
Seoul National University

### Master's degree in Information and communication technology
Ajou University


## Contact & Social
- LinkedIn: https://linkedin.com/in/jaiyoung-choi-42752216

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Source: https://flows.cv/jaiyoung
JSON Resume: https://flows.cv/jaiyoung/resume.json
Last updated: 2026-04-12