Systemsthatship.
Machine learning engineer. I build production ML and agentic AI systems — models, the infrastructure they run on, and the agents that keep them honest.
Seattle, WA · Building in private
2×.
Offer acceptance · 11.5% → 26%
Event-driven.
A flexible backbone for AI systems
3 a.m.
Triaged without you
–40%
Pipeline runtime · $95K/yr saved
+20%.
Auto-priced rate · patent pending
≠
Thesis vs outcome
2×.
Offer acceptance · 11.5% → 26%
Event-driven.
A flexible backbone for AI systems
3 a.m.
Triaged without you
–40%
Pipeline runtime · $95K/yr saved
+20%.
Auto-priced rate · patent pending
≠
Thesis vs outcome
≠
Thesis vs outcome
+20%.
Auto-priced rate · patent pending
–40%
Pipeline runtime · $95K/yr saved
3 a.m.
Triaged without you
Event-driven.
A flexible backbone for AI systems
2×.
Offer acceptance · 11.5% → 26%
≠
Thesis vs outcome
+20%.
Auto-priced rate · patent pending
–40%
Pipeline runtime · $95K/yr saved
3 a.m.
Triaged without you
Event-driven.
A flexible backbone for AI systems
2×.
Offer acceptance · 11.5% → 26%
Selected work
4 in detail- 2026Agentic selling
A user-facing agent that writes the case for every quote — comparable research, LLM-judge selection, and a self-correcting generator producing a per-quote sell pitch. First phase more than doubled offer acceptance.
Built at Alt · LLM agents, Python, AWS
- 2026Event-driven agent backbone
The SQS + Lambda event backbone that triggers the agentic systems — domain events in, agent workflows out, with retries and dead-letter queues instead of crons and crossed fingers.
Built at Alt · AWS SQS, Lambda, Terraform
- 2022ML platform
The infrastructure every pricing model runs on — re-architected around Snowflake and Airflow for a 40% faster production pipeline, $95K/year lower compute spend, and deploys gated by the team's first pre-production testing framework.
Built at Alt · Snowflake, Airflow, AWS
- 2025Model-evaluation triage
An automated layer that evaluates candidate pricing models and routes every asset bucket to the one that prices it best — raised the auto-priced rate by more than 20%. Patent pending, named inventor.
Built at Alt · Patent pending · Python
Currently building
Work in progressBuilding something that needs to hold up in production?
sophie.fc.yin@gmail.com