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Xingchi Guo

Xingchi Guo

Full-Stack Engineer

Developer Tools · AI Systems · Infrastructure

Full-stack software engineer building production applications across frontend, backend, APIs, cloud infrastructure, and delivery workflows.

My current work focuses on developer tools, AI-assisted software systems, and reliable end-to-end product engineering.

Selected work

Developer tooling, a full-stack product, and authentication infrastructure. Each links to a case study.

Engineering Execution Control Plane

ExecRelay

Engineering execution and evidence infrastructure for developers and AI coding agents. ExecRelay runs work in a real terminal and records process outcomes, evidence, verification, and repository changes as separate, linked records.

  • Rust
  • Tauri
  • TypeScript
  • React
  • PTY
  • Shell integration
  • +4 more
Case studyDownload

Career Search & Interview Workflow System

CareerNeed

A full-stack product that models a job search as one connected workflow — sources, jobs, career directions, resumes, applications, and interviews — with AI analysis that has to cite its evidence before it is shown.

  • Next.js
  • React
  • TypeScript
  • Python
  • +8 more
Case study

Product-Independent Authentication Infrastructure

Reusable Auth Kit

Authentication infrastructure that several products can share without sharing accounts, permissions, or data — provider-neutral identity contracts, a web adapter, an explicit API client, and independent token verification on the server.

  • TypeScript
  • React
  • Next.js
  • Python
  • +4 more
Case study

Research

AI security research

  • AI Security Research

    Evidence Integrity Research

    Can adversarial instructions embedded in source documents corrupt claim-level evidence integrity in evidence-grounded LLM applications?

    Read more

Stack

Technical focus

Frontend

  • React
  • Next.js
  • Angular
  • TypeScript
  • RxJS
  • NgRx

Backend

  • Python
  • FastAPI
  • Node.js
  • .NET
  • REST APIs
  • PostgreSQL

AI / Data

  • LLM integration
  • RAG
  • Embeddings
  • Vector search
  • Structured outputs
  • Agent workflows

Infrastructure

  • AWS
  • Azure
  • Docker
  • GitHub Actions
  • CI/CD

Quality

  • Playwright
  • Pytest
  • Jest
  • Cypress
  • Integration testing

Background

Experience

ANSI

Software Engineer · 2023–2026

Angular/TypeScript applications, API integration, and delivery automation for standards-management software.

AWS

Front-End Engineer · 2022–2023

React/TypeScript product engineering for QuickSight Q and Glue Studio.

Universal Processing

Software Engineer · 2021–2022

Application and service integrations for payment and merchant workflows.

Get in touch

Reach me by email or on LinkedIn. You can also find my work on GitHub.