Available for new roles

Senior full-stack
developer
based in New York.

6+ years shipping scalable React applications and financial systems. I build things that are fast, clean, and used by thousands of people.

View projects guoallen38@gmail.com

Currently @ Marsh McLennan·Looking for my next role

Scroll

React·TypeScript·Next.js·Node.js·D3.js·Redux·Postgres·Docker·Kubernetes·TailwindCSS·Firebase·REST APIs·React·TypeScript·Next.js·Node.js·D3.js·Redux·Postgres·Docker·Kubernetes·TailwindCSS·Firebase·REST APIs·

Full-Stack·6+ Years·New York City·Open to Work·Fintech·E-Commerce·No-Code·Performance·Agile·Code Reviews·UI/UX·Scalable Systems·Full-Stack·6+ Years·New York City·Open to Work·Fintech·E-Commerce·No-Code·Performance·Agile·Code Reviews·UI/UX·Scalable Systems·

Years of professional experience

Global users served daily

Full-stack projects shipped

Technologies in active use

Stack

Selected projects

Click a card to read the case study

01 — FINTECH

Finance Flow

Personal finance dashboard with real-time data visualization and budget tracking.

Next.jsTypeScriptD3.jsFirebaseTailwindCSS

02 — FINTECH

Trading Order Entry UI

High-speed order entry system with natural language parsing, draft autosave, and real-time validation.

Next.jsTypeScriptTailwindCSSTanStack TableExpress

03 — COMMUNITY

Post Guru

Forum platform for discovering posts and threaded community discussions.

Next.jsTypeScriptMaterial UIRedux

04 — NO-CODE

SiteLite

No-code webpage builder — publish a site without writing a single line of HTML.

ReactReduxFirebaseNode.jsJavaScript

05 — E-COMMERCE

HAVA's Runeshop

Full-stack fantasy e-commerce with guest and user flows, cart, and checkout.

ReactReduxExpressPostgresJavaScript

Experience

Senior Software Developer

Marsh McLennan · New York City

Led development of scalable React applications for financial journal systems. Built a Cash Application platform automating payment-invoice matching, significantly reducing manual effort. Drove front-end and back-end performance optimizations for thousands of global users. Mentored junior developers through code reviews and career development.

ReactTypeScriptNode.jsAgile

2022 → Present

Application Engineer I

Paradyme Management Inc. · Greenbelt, MD

Built and maintained REST APIs, delivered UI improvements on a government dashboard app, added Jest unit tests improving code coverage, and managed containerized deployments on OpenShift in an Agile environment.

ReactREST APIsJestOpenShift

2020 → 2022

Let's work together

Get in
touch.

guoallen38@gmail.com

Senior full-stackdeveloperbased in New York.