Liam Walsh

Software Developer / Data Scientist

Skills

Languages
Python, C++, Java, JS
Data & ML
SQL, forecasting, clustering, classification, model interpretability
Systems
Linux, Bash, CI/CD
Tools
Docker, PostgreSQL, Airflow, Presto, Django
AI
Daytona, Bedrock, Boto, PyTorch, Terminus, Codex, Cursor, Claude Code, MCP tooling

Experience

Refresh

San Francisco, CA / 2026

AI Contractor

  • Designed programming and spatial reasoning tasks for training frontier AI models.
  • Created human interface coding tasks to evaluate real-world development capability.
  • Contributed to open-source benchmark terminal-bench.
  • Built and tested evaluation harnesses and sandboxed testing environments at large scale.

Amazon

Sunnyvale, CA / 2022 - 2024

Software Developer, L4 (Devices)

  • Ported Android applications to proprietary devices across custom hardware and software stacks.
  • Led low-level debugging across device platforms, including graphics, OS services, and IPC.
  • Built and improved CI/CD pipelines for firmware and application releases.
  • Collaborated with hardware, OS, and app teams to enforce platform standards.
  • Drove root cause analysis for complex system failures.

Performance Star

Santa Clara, CA / 2022

AI Researcher

  • Developed human-interpretable analyses of black-box ML models.
  • Applied explainability techniques including feature attribution and surrogate modeling.
  • Implemented explanation methods across input statistics, feature space, and model approximations.
  • Developed a frontend interface for configuring and visualizing model explanations.

Lyft

San Francisco, CA / 2021

Data Scientist (Lyft Bikes and Scooters)

  • Built revenue forecasting pipelines using Airflow, Presto, and Prophet.
  • Developed dashboards tracking cost, efficiency, and revenue KPIs.
  • Designed scalable data models and ETL pipelines from product and finance requirements.
  • Debugged and optimized pipelines supporting multimillion-dollar revenue streams.
  • A/B tested large system changes targeted at increasing overall revenue.

WhatsBusy

Austin, TX / 2020 - 2021

Backend Data Science Internship

  • Used Django and PostgreSQL to create POS data ingestion and analysis services.
  • Created REST APIs in Django to build insight dashboards for stakeholders.

Education

University of Illinois at Urbana-Champaign

2021

B.S. in Statistics & Computer Science

  • CS 412: Data Mining
  • CS 233: Computer Architecture
  • Stat 420: Applied Statistics
  • Stat 428: Statistical Computing

Baton Rouge Magnet High

2017