Kijeung Choi

AI Researcher

New York City, New York, United States15 yrs 9 mos experience

Highly Stable

Key Highlights

Over 10 years of experience in ML feature data applications.
Expert in building MLOps infrastructure at Amazon scale.
Proven track record in recommendation and personalization systems.

Stackforce AI infers this person is a SaaS expert with a strong focus on MLOps and data analytics.

Contact

Skills

Core Skills

MlopsAws SagemakerData AnalyticsData Engineering

Other Skills

PyTorchAmazon ECSPySparkPandas (Software)LuceneHugging Face ProductsgRPCTypeScriptAmazon Elastic MapReduce (EMR)Apache SparkJavaElasticSearchMySQLHadoopSqoop

About

10+ years building (ML feature) data applications and platforms at Amazon scale 7+ years designing end-to-end recommendation, personalization, and analytics systems at Amazon scale 4+ years developing MLOps infrastructure at Amazon scale

Experience

15 yrs 9 mos

Total Experience

3 yrs 10 mos

Average Tenure

2 mos

Current Experience

Bloomberg

Sr. MLOps Engineer

Mar 2026 – Present · 2 mos · New York City Metropolitan Area · Hybrid

Amazon

8 roles

Sr. Software Development Engineer

Oct 2024 – Jan 2026 · 1 yr 3 mos

Sponsored Brand Ads, ML / high throughput backend application / feature data pipeline.

AWS SageMakerMLOpsPyTorchAmazon ECSPySparkPandas (Software)+5

Sr. Software Development Engineer

Mar 2024 – Oct 2024 · 7 mos

Personalization ML Infrastructure

AWS SageMakerMLOpsPyTorchAmazon ECSPySparkPandas (Software)+3

Sr. Software Development Engineer

Oct 2023 – Feb 2024 · 4 mos

SCOT Forecasting

AWS SageMakerMLOpsPyTorchPySparkPandas (Software)Hugging Face Products+2

Sr. Software Development Engineer

Promoted

Dec 2021 – Sep 2023 · 1 yr 9 mos

Lead MLOps Automated Solution for Seller Growth & Development

PySparkTypeScriptAmazon Elastic MapReduce (EMR)MLOps

Software Development Engineer II

Apr 2018 – Nov 2021 · 3 yrs 7 mos

Amazon Retail Analytics
► Design/Building Amazon retail/3p analytics stream/batch process platform / service.
Stream process engines / EMR / Hive / HBase / Spark / Redshift / PrestoDB / RDS / Postgres / Kinesis / Lambda / etc

Pandas (Software)TypeScriptAmazon Elastic MapReduce (EMR)Data Analytics

Software Development Engineer I

Sep 2016 – Mar 2018 · 1 yr 6 mos

Amazon Prime Video, Semantic Search Exp
► Design/Building Sematic Search data ingestion pipeline / services
Java, Spark, S3, DynamoDB, EMR, Lambda, Kinesis, Elasticsearch, CloudSearch, StepFunctions

TypeScriptAmazon Elastic MapReduce (EMR)Data Engineering

Sr. Software Development Engineer

Promoted

Jan 2015 – Jan 2026 · 11 yrs

Software Development Engineer

Jan 2015 – Aug 2016 · 1 yr 7 mos

► Design/Building Audible service frameworks, APIs and Data Pipelines.
Java (Spring/Junit/Mockito/PowerMockito), EC2, EMR, SQS, SNS, S3, DynamoDB, OracleDB, and Amazon internal frameworks/tools

Megalytic

Software Engineer

Jun 2012 – Dec 2014 · 2 yrs 6 mos · New York City Metropolitan Area

► Design, development and maintenance of API-driven analytics reporting web app, www.megalytic.com aggregating analytics sources. i.e., Facebook Insights, Google Analytics, Google Adwords, Twitter, Linkedin, YouTube, etc via on-demand REST sevices.
PHP5 w/ Zend.
► REST on-demand / Scheduling data loads from multiple data sources.
JAVA w/ concurrency (Tomcat7 Servlet / Jersey), Crontab (Shell script).
► Database Management
MongoDB and MySQL
► AWS RDS, EC2 instance Management

Buncee llc

Software Engineer

Sep 2011 – Jun 2012 · 9 mos · Long Island City, New York

► Web (Mobile) application (buncee.com / Buncee Bits / Buncee Pro) development and maintenance
PHP5, jQuery, Javascript, AJAX, HTML, JSON, XML, and CSS
► Database Management
MySQL
► Ubuntu Server Management

Icotech, inc

Senior Programmer

May 2010 – Aug 2011 · 1 yr 3 mos

► Video codec interface development and maintenance (win32 API, COM, COM+) SDKs, C, and C++
► Web scheduling application development and maintenance
ASP.NET 4, C#, XML, HTML, Javascript, CSS, AJAX, and NSIS
► Database Management
SQLSERVER, MySQL, and ADO.NET