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Alexander Choy

Director of AI/ML Engineering specializing in MLOps, data platforms, and 3D computer vision

AetrexColumbia UniversityTeaneck, NJ10 Years ExperienceDirector LevelWorks Remote

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About

Backend/data engineer focused on production ML/LLM systems: built a real-time FastAPI inference API on Kubernetes with strong reliability patterns (timeouts, idempotent retries, centralized error handling). Delivered AWS platforms using EKS + Lambda with GitHub Actions/Helm CI/CD and built Glue-based ETL from S3/Kafka into Snowflake with schema evolution and data-quality controls; also modernized legacy analytics/recommendation workflows into Python services with safe, feature-flagged cutovers.

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Key Strengths

  • Built and operated a stateless async FastAPI service for real-time ML/LLM inference on Kubernetes
  • Strong reliability engineering: explicit timeouts at boundaries, idempotent retries with backoff/jitter, Redis deduplication
  • Production AWS delivery with EKS + Lambda, GitHub Actions CI/CD, Helm releases and automated rollbacks
  • Secrets and access control using AWS Secrets Manager and IAM roles (no hard-coded secrets)
  • Data engineering with AWS Glue/PySpark integrating S3, Kafka, and Snowflake; schema evolution and data quality checks with CloudWatch metrics
  • Modernized legacy batch/Excel/SQL logic into Python microservices with parallel-run parity validation and phased cutover using feature flags
  • SQL performance optimization in PostgreSQL: reduced query latency from 20–30s to <3s and cut DB CPU ~50–60% via indexing, rewrites, and partitioning
  • Owned pipeline incident response: CloudWatch detection, log/metric triage, checkpointed reruns, DLQ for malformed records, improved monitoring and change management

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Experience

Director of AI/ML Engineering & Data PlatformsAetrex, Inc · Feb 2023 – Present
Lead ML Product Manager, AI/ML & Data ScienceAetrex, Inc · Jul 2021 – Feb 2023
Manager, AI/ML & Advanced AnalyticsAktana · Jun 2020 – Jul 2021
Data Scientist & Machine Learning EngineerAetrex, Inc · Nov 2019 – Jun 2020
Software Engineer & AI/ML EngineerAetrex, Inc · Sep 2018 – Oct 2019
Machine Learning Research AnalystColumbia Psychiatry · Sep 2017 – Aug 2018
Research AssociateColumbia University in the City of New York · Jun 2016 – Aug 2017
Research EngineerUniversity of Rochester · Nov 2015 – May 2016
Summer InternIcahn School of Medicine at Mount Sinai · Jun 2015 – Aug 2015internship
Summer InternHackensack University Medical Center · May 2014 – Jul 2014internship
Summer InternMemorial Sloan Kettering Cancer Center · May 2013 – Jun 2013internship

Education

Columbia Universitydoctorate, Artificial Intelligence (2026)
Columbia Universitymaster, Biomedical/Medical Engineering (2017)
University of Rochesterbachelor, Biomedical/Medical Engineering (2016)

Awards

  • Semi-finalist - Columbia Venture Competition
  • Best Prototype - Columbia University Biodesign course (2017)

Skills

Amazon BedrockAmazon CloudWatchAmazon DynamoDBAmazon EC2Amazon ECSAmazon RedshiftAmazon S3Amazon SageMakerAmazon SQSAngularAzure FunctionsAzure Machine LearningBERTBashBigQuery

Languages

English

Publications

2 publications

T-cell mechanosensingBiomedical engineeringLive-cell imagingMicroscopy image analysis

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AI & Machine LearningAI & Machine Learning in NYC MetroArtificial IntelligenceApache AirflowAmazon BedrockAmazon CloudWatch

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Alexander already has a relationship with Reval, so a warm intro from us gets a much better response than cold outreach.

Typically responds within 24 hours

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Hire with Reval

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Alexander ChoyDirector of AI/ML Engineering specializing in MLOps, data platforms, and 3D computer vision