September 2026 — Now
Visa
Software Engineer
Hi, I'm
Alan Zhang
About
Software Engineer at Visa. Previously at Toll Brothers, where I built LLM-powered tools on serverless AWS data pipelines. Bachelor of Science in Computer Science from the University of Maryland, College Park. You can find selected projects below.
Experience
May 2025 — September 2026
Fort Washington, PA
Toll Brothers
Software Engineer
TypeScriptPythonNode.jsNext.jsAWSBedrockLambdaS3DynamoDB
- Shipped an LLM-powered QA platform automating compliance analysis for land survey submissions, saving 2 hours per submission across 5–10 daily nationwide reviews.
- Built a CI/CD-integrated code review pipeline (Claude Sonnet) that reconstructs full file context from unified diffs and posts inline comments, cutting review time by 30 minutes per PR.
- Automated PDF batch ingestion with a Node.js CLI orchestrating uploads across CMS, S3, and Workfront APIs, replacing a week-long manual process and saving 100+ hours per batch.
- Built a reusable server-side “Print View” document generation system producing dynamic community brochures with listing data, QR codes, and configurable filtering for thousands of monthly users.
- Architected a serverless AWS data pipeline (Lambda, Glue, Athena, EventBridge, CDK) aggregating data from 4 competitors’ undocumented APIs into a unified SQL-queryable warehouse requiring 0 operational maintenance.
Skills
Languages, frameworks, data, cloud, and tools I've worked with.
Languages
Frameworks & Libraries
Databases & Cloud
Projects
Applylog
Chrome extension that syncs Greenhouse, Lever, Ashby, and Workday apps into one tracker — with resume match scoring and Gmail status updates.
YSC Lunch Soccer
Full-stack scheduling platform for a 200-member soccer community — attendance, payments, SMS/email notifications, and skill-based team balancing.
