Alexander Xie | Software Engineer

$ cat experience.log

Experience

layer 05

IBM · New York, NY

Jun 2026 – Present

Building AI agents and data pipelines on the Nexus Squad (Agentic AI & Workflow Automation)

Python · watsonx.data · Spark · Presto · dbt · Airflow · Confluent · Langfuse

layer 04

Amazon · Boston, MA

Jun 2025 – Aug 2025

93% faster config creation

Built a Bedrock AI agent that automated config generation, reducing creation time by 93% for 400+ developers
Engineered a data pipeline using Lambda, DDB, and OpenSearch to auto validate and process 3K+ configs per day
Published agent to Amazon's package manager with evaluation layer, boosting config correctness by 40% org-wide
Scaled adoption across PXT as teams integrated package to streamline workflows and cut config turnaround by 75%

Bedrock · Lambda · DynamoDB · OpenSearch · CDK

layer 03

ColAI · Remote

Jul 2024 – Dec 2024

+18% forecast accuracy

Automated ETL pipelines for ingest, cleaning, and feature engineering in PyTorch, cutting runtime by 50%
Developed transformer forecasting pipeline across 30 datasets, improving accuracy 18% and anomaly detection 22%

PyTorch · Python · Pandas · Scikit-learn

layer 02

New York University · New York, NY

Feb 2024 – May 2026

45% fewer misconfigurations

Automated security configuration enforcement in Bash across 700+ systems, reducing misconfigurations by 45%
Built monitoring workflows for network reliability, enabling early detection of failure and cutting downtime by 30%
Designed Tisch IT intranet into internal dev platform, improving tool discoverability and team efficiency

Bash · Linux · Python · Networking

layer 01

Fortinet · Sunnyvale, CA

Jun 2023 – Aug 2023

400+ vulnerabilities fixed

Detected and remediated 400+ vulnerabilities, preventing XSS, SQL injection, and privilege-escalation attacks
Reproduced 150+ suspected flaws in sandbox environment to verify exploitability and confirm patch success
Partnered with InfoSec to improve scanning coverage and coding patterns, increasing protected codebase by 20%

Python · Burp Suite · SAST · SQL

$ ls projects/

Real-time voice agentSept 2025 – Present

A real-time AI technical interviewer you talk to. It listens, keeps track of the conversation, and answers out loud.

Architecture: LiveKit audio → speech-to-text → Gemini (Vertex AI) → ElevenLabs TTS → LiveKit audio
LLM calls run in a dedicated inference worker, separate from the Next.js app, so real-time audio never waits on the UI.
How it works: Context-aware prompting with conversation memory, so it gives structured, interview-style guidance instead of one-off answers.
Stack: Next.js · TypeScript · LiveKit · Vertex AI (Gemini) · Docker

Agentic code reviewFeb 2025 – Present

A GitHub App that records a video of your UI change actually working and posts it on the pull request.

Architecture: PR webhook → Gemini reads the diff → writes a Playwright script → sandboxed run → video posted to the PR
How it works: Reviewers get visual proof instead of “trust me, the button works”, with tests generated from the diff rather than written by hand.
Stack: GitHub Apps · Gemini 1.5 Flash · Playwright · Next.js