Diqi Zeng
Senior Software Engineer - Frontend Platform & Full-Stack
Senior frontend platform engineer building React / GraphQL product surfaces for complex developer infrastructure used company-wide.
me@dkt.moe
650-505-0955
dkt.moe · dkt.moe/linkedin
U.S. Citizen; eligible to obtain security clearance
Experience
Meta / Facebook - Software Engineer
- Frontend tech lead for Meta Infrastructure's CI/CD and code deployment team, building shared React / GraphQL web platforms engineers use company-wide to understand CI state, act on deployment signals, land code, and coordinate release-critical workflows.
- Design frontend architecture and client/server contracts for complex developer workflows, spanning typed data models, GraphQL APIs, Relay data flows, React interfaces, staged rollout, and production support.
- Rebuilt company-wide code-freeze workflows into a modern React / GraphQL platform, replacing fragmented legacy flows with reusable UI patterns and data-fetching architecture for release-critical events.
- Modernize legacy deployment applications, including older UI frameworks and incompatible React surfaces, using instrumentation, profiling, and staged migrations; delivered a multi-fold performance improvement while preserving existing engineer workflows.
- Built interactive debugging and profiling tools for CI/CD and deployment pipelines using Canvas, SVG, and D3-style visualizations, helping engineers debug timing, code-landing state, and deployment behavior.
- Earlier tenure included Meta's web IDE and code-browsing platform, plus a 2008-era company-wide code-quality migration and secure billing/payment systems in Monetization.
Sony Corporation of America - Front-End Engineer
- Built internal threat-management dashboards with Angular, Node.js, Express.js, and MongoDB, visualizing internal and public network-threat data.
- Improved frontend delivery for internal tools by Dockerizing projects and redesigning GitLab CI workflows around repeatable builds and deployments.
Earlier Experience
- Mid-Atlantic Crossroads: rebuilt network-topology visualizations with D3.js and helped start a React / TypeScript modernization path.
Skills
Frontend Platform: JavaScript, Flow, TypeScript, React, Relay, Relay 3D, GraphQL, HTML5, CSS, Meta StyleX, frontend architecture, shared UI patterns, browser performance, responsive layouts.
Backend and APIs: Hack/HHVM, PHP, C++, GraphQL API design, Ent / typed ORM schemas, REST APIs, client-server contract design.
Visualization and Debugging: Canvas, SVG, D3, CI/CD profiling, logging, debugging workflows.
Developer Infrastructure: CI/CD, deployment systems, code review and code-landing workflows, staged rollouts, developer tooling.
Data and Pipelines: Python, pandas, MySQL/MyRocks, PostgreSQL, schema design, Hive, Presto.
Tools: Git, Mercurial SCM, Sapling SCM, CI/CD tooling, Claude Code, Codex, MetaCode, MCP.
Education
University of Maryland, College Park - Bachelor of Science, Computer Science · Dec 2020
Dalhousie University - Bachelor of Computer Science program; transferred to University of Maryland · Jan 2015 - May 2017