# Liem Ta

> Principal Software Engineer

Location: New York City Metropolitan Area, United States
Profile: https://flows.cv/liem

Spotify NYC, software engineer. Working remotely in Houston

## Work Experience
### Principal Software Engineer @ Matey AI
Jan 2024 – Present | Houston, Texas, United States
AI/Agentic System → Cursor for Legal Discovery
- Built a multi-step reasoning engine that breaks down complex legal research questions, executes them across document collections, and synthesizes coherent answers - handles questions that would take paralegals hours or days
- Built document understanding that works across formats lawyers use - PDFs, Office docs, emails, images, audio, video
- Built multi-provider LLM abstraction with intelligent caching that cut API costs by 85%+
- Built Graph RAG that understands relationships between people, organizations, and events - finds connections keyword search misses
- Built context management that handles arbitrarily large document sets - compresses intelligently and maintains accuracy even when source material far exceeds context windows
- Built citation and provenance tracking - every AI answer links back to exact source documents with page numbers
- Zero customer complaints on answer accuracy

Knowledge Graph & Entity Resolution
- Built proprietary canonical entity resolution that disambiguates and links entities across millions of documents - connects aliases, name variations, and references scattered across thousands of pages into a unified identity graph

Infrastructure
- Designed and built the entire AWS infrastructure in Terraform - one command spins up the full stack from scratch
- Built video/audio processing with GPU-optimized clusters - handles conversion, storage optimization, and browser-playable formats at scale
- Built a custom ECS autoscaler that watches queue depth and scales workers based on queue pressure
- Set up all monitoring, CI/CD, and service-to-service communication
- Performed 95% of all SOC II and ISO 27001 compliance work - policies, controls, audit prep

Cost Engineering
- Analyzed and neutralized spend across MongoDB Atlas, AWS, and LLM API calls, saved $100,000+ in wasted infra costs

### Software Engineer @ Spotify
Jan 2019 – Present | New York City Metropolitan Area
Individual contributions directly account for $100,000,000+ per quarter in ads revenue

Design and implementation of low latency systems to preserve the integrity of the user’s experience on Spotify

Lead engineer on Apple’s SkAdNetwork endpoint. Used to give Spotify credit for app installs via ads served through Spotify iOS app

Expert in root cause analysis and debugging distributed systems

### Software Engineer II @ Facebook
Jan 2018 – Jan 2019 | New York City Metropolitan Area
Design and implementation of management, automation, data collection, performance analysis, monitoring, alerting, and root cause analysis tools

Contributions improved performance, reliability, and cost-savings, throughput for Timeline, Instagram, Oculus data pipelines

Analyzed and improved efficiency, scalability, and stability of various system resources

Scaled monitored entities by greater than 10x through design and implementation of a dependency graph

### Software Engineer @ Facebook
Jan 2017 – Jan 2018 | New York City Metropolitan Area

### Software Engineer (C++) @ Fidessa
Jan 2016 – Jan 2017 | New York City Metropolitan Area
Design, coding, and testing of critical market and trading components
Wrote multi-threaded, low latency trading systems used in high frequency trading, in C++

### Software Engineering Intern @ Yodle
Jan 2015 – Jan 2015 | New York City Metropolitan Area
Responsible for implementing email marketing platform, leading to increase in product package revenue 66%

Built website templates to be used by thousands of clients using AngularJS, NodeJS, Bootstrap

Automated quality assurance testing of web interfaces using Selenium, JUnit, and Protractor

Version control using git, issue tracking using JIRA, code coverage, debugging, and documentation tools

Technologies used: SQL, Play, Spring, REST, Google Test, Gradle, Bower

### Undergraduate Teaching Assistant @ The University of Texas at Austin
Jan 2015 – Jan 2015 | Austin, Texas
Co-author of UIL Texas State Computer Science programming exam

Undergraduate TA for Data Structures (Java), Introduction to Programming (Python), and Object-Oriented Programming (C++)

Held office hours twice a week, hosted study sessions, graded students’ programming projects and exams

Strong debugging skills, ability to quickly build a conceptual model of others’ code to assist in debugging


## Education
### Master’s Degree in Computer Science
Georgia Institute of Technology
Jan 2018 – Jan 2021

### Bachelor of Science in Computer Science
The University of Texas at Austin
Jan 2011 – Jan 2015


## Contact & Social
- LinkedIn: https://linkedin.com/in/liem-ta-25810022

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Source: https://flows.cv/liem
JSON Resume: https://flows.cv/liem/resume.json
Last updated: 2026-03-20