Frontend Software Engineer
Building product-focused web apps, browser extensions, and AI-powered tools — from concept to deployment.
I'm Tony Martinez, a Frontend Software Engineer based in Portland, OR with 3+ years building production-grade web applications, published browser extensions, and AI-powered multimodal interfaces. I work across the full stack — React and Next.js on the client, Node.js and MongoDB on the server — and care deeply about performance, testable code, and shipping architecture that holds up in production.
A process built for clarity, quality, and shipping on time.
I start by understanding your goals, users, and constraints — scoping requirements, aligning on architecture, and identifying edge cases before a single line of code is written.
Wireframes and component blueprints that translate requirements into clear, testable interfaces. Every decision is intentional and traceable back to a real user or business need.
Production-grade TypeScript, React, and Next.js — written for performance, accessibility, and long-term scalability. Tested with Vitest or Jest on every pull request.
CI/CD via GitHub Actions, deployed to Vercel, monitored in production. I don't disappear after launch — I iterate based on real metrics and real user feedback.
My professional track record.
Freelance · Portland, OR
A selection of things I've built and designed.
Portland Timbers Matchday is a published Chrome Web Store extension built with Manifest V3 that surfaces upcoming match information, countdown timing, and fan-interaction features for Portland Timbers supporters. It uses a background service worker, runtime messaging, scheduled data refresh, and local storage persistence, and is tested with Jest and shipped with GitHub Actions CI.
End-to-end website design and development for a Portland-area family-owned landscaping company, built for clarity, trust, and conversion-focused local lead generation. The project focused on translating a local service business into a polished, modern web presence that feels credible and easy to navigate across devices.
Full-stack AI email marketing analytics platform. Gemini-powered chat assistant with SSE streaming and function calling, voice I/O via Web Audio API + Google Cloud TTS, emotional impact analysis with MediaPipe facial tracking, and a campaign dashboard backed by MongoDB.
A client-side coupon generator built with Next.js 15, TypeScript, and Tailwind CSS. Generates discount codes with configurable percentages, custom codes, expiration dates, and scannable QR codes — no backend required. Persists to localStorage and is tested with Vitest, shipped with GitHub Actions CI.
Manifest V3 Chrome extension that detects merchant links on live Google Search result pages and injects real-time cashback alerts directly into the results — no redirects, no popups. Built with TypeScript, Vite, and Shadow DOM for complete style isolation so injected UI never conflicts with host-page styles. Architecture spans a content script, MV3 service worker, merchant registry, and a cached offer-lookup layer via chrome.storage.local. Tested with Vitest and shipped through GitHub Actions CI.
Technologies and tools I work with every day.
JavaScript
TypeScript
Python
C++
HTML5
CSS
Swift
React
Next.js
Node.js
Express
Tailwind
Firebase
WordPress
MongoDB
PostgreSQL
Git
GitHub
GitHub Actions
VS Code
Cursor
Jest
Vitest
Vercel
Jira
Google Cloud
Agile
Figma
UXPin
Attention Insight
Claude
OpenAI
Gemini
MediaPipe
Copilot
Midjourney
Perplexity
Le Chat
Grok
NotebookLMOn The Workbench
Portfolio v2 & Cashback Injector
Next.js 15 + Vercel | Context-Aware Chrome Extensions
Rebuilt from static HTML/CSS/JS → Next.js 15 + TypeScript on Vercel plus cashback extension that injects ranked cashback/deal offers into search results.
Core Focus
Browser Extension Architecture & AI Orchestration
Chrome Extension APIs | Contextual AI Interfaces
Multi‑step agentic systems that span the full stack + adaptive research automation building next-gen productivity tools for intelligent browser workflows.
Resume
View my resume for the complete work history, tech stack, and references.
3+
Years Experience
5+
Projects Shipped
Frontend
Software Engineer
Have a project in mind or just want to say hello? hello@tonymartinez.tech
