Engineering Executive · Systems at Scale
Peter
Chang
Senior Director — Head of Marketplace Engineering, building global systems from the ground up.
Open to connect
Think
Scroll
01
The thesis
I architect and scale the global marketplace, advertising, and data-streaming infrastructure that moves billions in commerce — and I lead the international teams that build it.
Results-driven engineering leader with a proven history of spearheading multinational teams to consistent double-digit revenue expansion. I favor flat, three-layer organizational models that accelerate collaborative innovation and swift business delivery. Today I direct initiatives to enhance catalog quality and integrity — ensuring a best-in-class product selection experience for a global marketplace ecosystem, powered by customizable AI frameworks spanning OCR to automated content generation.
02
Operating at scale
Revenue
$1B+
Ad revenue engine
architected from zero
architected from zero
Teams
10→100+
Engineers scaled
on a single org
on a single org
Footprint
3
Countries — US · KR · CN
multinational teams
multinational teams
Throughput
1012
Trillions of events
petabytes of data
petabytes of data
03
Selected experience
2022 — NOW
Head of Marketplace Engineering
CoupangSr. Director · Seattle, WA
↗
- Direct a multinational org across US, South Korea & China driving double-digit annual revenue growth via a flat three-layer model.
- Spearhead KR & TW growth with applied AI — OCR through automated content generation; built customizable AI frameworks per seller category.
- Own Marketplace Platform (reliability & core architecture), Marketplace Growth (conversion & GMV), and Other Bets (global ops & Travel).
- Drive quality via automation: intelligent metadata enrichment, image upgrading, automated descriptions, and algorithmic price optimization.
2020 — 2022
Director / Sr. Director, Ads Infrastructure
CoupangSeattle, WA
↗
- Led ground-up architecture of a proprietary advertising engine; scaled the team 10 → 100+ and surpassed $1B revenue in 2022.
- Architected the core ML-driven ranking engine: indexing, pre-ranking, ranking & complex filtering pipelines at high volume.
- Directed Ads Creatives UX across iOS, Android & web; engineered real-time budget, settlement & ML-feature reporting frameworks.
- Deployed automated integrity & fraud-detection protocols within the ad-serving pipeline.
2018 — 2020
Director, Services Platform
CoupangSeattle, WA
↗
- Transformed Data Services into a unified global Service Platform org — 40+ engineers across US, China & South Korea.
- Messaging Platform: petabytes/day via Managed Kafka, Canal (MySQL sync) & the proprietary 'Roller' S3/HDFS ingestion pipeline.
- Weblogging: centralized event-tracking processing trillions of signals; Hive + real-time interfaces powering data-science ML.
- Common Tooling: global API Gateway, standardized deployment architecture & automated AWS cost-optimization frameworks.
2017 — 2018
Senior Manager, Data Services
CoupangSeattle, WA
↗
- Grew a high-velocity org from 4 → 20+ engineers, mentoring multiple line managers within 18 months.
- Architected 'Lumberjack' — a full-stack weblogging ecosystem with cross-platform libraries & a high-volume aggregation engine.
- Built a unified Kafka + Spark streaming framework letting teams ship managed pipelines in under 60 minutes.
2015 — 2017
Tech Lead, Transaction Bridge
Expedia, Inc.Bellevue, WA
↗
- Technical lead for Transaction Bridge (TxB) — end-to-end order distribution from Expedia, Hotels.com & Orbitz to downstream consumers.
- Stack: Kafka streaming backbone, Storm real-time compute, Cassandra & Elasticsearch — fully containerized via Docker on AWS EC2.
- Orchestrated cross-org support across Finance settlements, Trip Planning, Data Science & Fraud Modeling.
2014 — 2015
Senior Software Engineer
VisaBellevue, WA
↗
- Architected components for the Proxy Connection Service (PCS) — a high-performance Java REST API standardizing transaction lifecycles.
- Built a logging & validation framework from scratch at 95% coverage, clearing Fortify & external penetration security audits.
2011 — 2014
Software Engineer
SAP FieldglassNaperville, IL
↗
- Full-stack engineer on enterprise web apps — Java, MySQL & JavaScript with key open-source frameworks.
- Built ERP integration modules for Chevron, Vodafone & Bank of America via SOAP, REST & SFTP.
- Engineered SQL & high-volume transmission optimizations, cutting reporting execution latency substantially.
04
What I build
End-to-End E-commerce Ecosystems
Highly Extensible Global Architectures
High-Volume Systems Engineering
Algorithmic Price Optimization
Advanced AI Applications
Harness Engineering
Strategic Business Data Analytics
Multi-channel Marketing Operations
Brand Incubation
Cross-functional Technical Leadership
Kafka · Spark · Storm
Cassandra · Elasticsearch · Hive
Personal Product · iOS
Via Journal
An intelligent iOS application leveraging advanced AI to provide personalized journaling feedback and automated narrative synthesis — turning daily entries into reflective, structured story.
via.peter-chang.net ↗
05
Education
Chicago, IL
Illinois Institute of Technology
M.S., Computer Engineering
London, UK
Queen Mary University of London
B.S., Telecommunication Engineering with Management
Beijing, China
Beijing Univ. of Posts & Telecommunications
B.S., Telecommunication Engineering with Management