# Seungjoon Lee

> Staff SWE @ Apple | Data infrastructure management, Startup Advisor, Educator

Location: Los Altos, California, United States
Profile: https://flows.cv/seungjoon

With over 10 years of experience in data engineering, I am currently at Apple, where I manage 10+ PB of data and 100 TB of memory, handling 34B daily events and operating more than 2,000 jobs. I am responsible for designing, developing, and maintaining data platforms, infrastructure, and pipelines that support machine learning, analytics, and web services for various Apple products and features.

I am passionate about solving complex data problems and delivering innovative solutions that enhance efficiency, quality, and performance. I have a strong background in Python, Django, Spark, Hadoop, AWS, Kubernetes, and other cutting-edge technologies and tools that enable me to build scalable, reliable, and secure data systems. I also have a B.S. in Electrical Engineering and Computer Science from UC Berkeley, where I learned the fundamentals of data engineering and computer science. I am always eager to learn new skills and collaborate with other professionals to achieve shared goals.

## Work Experience
### Staff Software Engineer @ Apple
Jan 2020 – Present | Cupertino, California, United States
- Managing 10+ PB data and 100TB memory
- Handles 34B daily events
- Operating more than 2,000 jobs

### Senior Site Reliability Engineer @ Box
Jan 2018 – Jan 2020 | United States
- Built highly available DataPlatform Infrastructure using AWS, Terraform. Plus, built an infrastructure  RESTful API, Cost optimized/tracking service with Django
- Built CICD pipeline to build custom AMI with Packer
- Built Airflow services in multiple regions
- Manage hundreds of Elasticsearch, Cloudera Hadoop, Qubole, Kafka clusters as SRE
- Used Puppet to build on-premise host
- Used Docker/Kubernetes to build containerized services

### Principal Architect @ ScoreData Corporation
Jan 2017 – Jan 2018 | United States
Architect entire platform service from scratch
- Machine Learning platform as a service(PaaS)
- RESTFul API service with Django framework
- Kubernetes with Dockerized services
- Deploy with Ansible Playbook
- Datapipe with Apache Spark, Hive and Airflow

### Senior Rocket Scientist, Data Infrastructure acq. Sizmek & A9 @ Rocket Fuel Inc.
Jan 2017 – Jan 2017 | United States
- Introduced Apache Airflow for efficient workflow scheduling and applied to the datapipe.
- Building new data pipeline of 100TB/day, 2M/sec data set, using Spark, HBase, Hive and HP Vertica

### Principal Data Engineer @ Polymorph (acq. Walmart)
Jan 2015 – Jan 2017 | San Francisco Bay Area
Build huge impact products to advertising industry
- Architect scalable ad data pipeline from scratch using Apache Spark(40B+/Month)
- Built scalable real time Apache Spark Streaming pipeline with Apache Kafka(100K+ records/sec)
- Maintainable data workflow management using Spotify Luigi 
- Micro service architecture(Fraud detection, Delivery report, Segment audience, Machine Learning for CTR optimization and etc)
- Lambda architecture(Real time + Batch)
- Built Big Data process on top of Amazon cost effective EMR infra structure
- Integrated data processing with external companies for BI
- Data process optimization with Apache Parquet
- AWS Athena, Quicksight integration

### Senior Software Engineer @ ShareThis
Jan 2013 – Jan 2015 | Palo alto, CA
- Leading a Platform(Media Business) team
- Architect Ad Business Intelligent RESTful API framework for the scalable insight products
- Optimize multiple internal advertising exchange data flow
- Research social network data for digital advertising model(including VAST and VPAID)
- Scalable Advertising User Segmenting(5B+/Month) flow with Campaign Delivery Tracking
- ETL with Hadoop(60M+ events/Month), Sqoop and Oozie or Shell Script

### Web Application Developer @ ShareThis
Jan 2011 – Jan 2013 | Palo Alto, California
- Collaborated with Senior engineers and Ad Operation team to determine project plan and delegate tasks to engineering team.
- Developing ShareThis advertising platform with integration of first and third party ad networks to optimize social network and delivery process
- Implementing Object Oriented PHP Patterns for better maintenance. 
- Akamai, Memcached Scalable Services for delivering advertisement segment.
- RDBMS for large data systems and MongoDB for realtime campaign log service.
- Front-End Web Programming(XHTML/HTML5/CSS/OO Javascript/JQuery)
- API integration for first and 3rd party ad network with Zend Mail, Force.com, Google Double Click and Dart services.
- Back-end Java Programing with efficient time scheduling.

### Webmaster @ KGSA(Korean Graduate Student Association)
Jan 2010 – Jan 2010
Managed website for KGSA encouraged the members to communicate to each other online 

http://www.kgsa.net

### Computer Engineering Soldier @ KOREAN ARMY
Jan 2005 – Jan 2007
- Created a dynamic website tools for soldiers trainings
- Took the Korean army from paper and pen communication to a modern internet based communication, building a new more functional website.
- Developed a new communication webpage for Korean soldiers to improve work flow and daily scheduling procedures.


## Education
### B. S in Electrical Engineering and Computer Science
University of California, Berkeley


## Contact & Social
- LinkedIn: https://linkedin.com/in/seungjoonlee1984
- Portfolio: http://www.seungjoonlee.com

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