AA Alonzo Alden

Senior Front-End Engineer

Alonzo Alden

Angular, React, TypeScript, and production UI for complex SaaS products, geospatial mapping platforms, API-backed workflows, and practical AI-assisted engineering.

  • Los Angeles / Palmdale, CA
  • 9+ years experience
  • Angular, React, TypeScript

Frontend systems for real product complexity.

I work across product requirements, domain rules, shared UI patterns, API integrations, performance work, and the day-to-day engineering habits that keep production software healthy.

01

Angular Applications

Production Angular and TypeScript features, component architecture, RxJS, NgRx, Signals, SCSS, React-capable UI work, Google Maps, and responsive interfaces.

02

Mapping Platforms

Google Maps, deck.gl/WebGL overlays, MVT/vector tile rendering, dynamic filtering workflows, and dense property data interfaces.

03

AI-Assisted Engineering

Codebase exploration, refactor planning, debugging support, test-case discovery, and PR review support.

Resume

This is the web version of my resume. The downloadable PDF is formatted for recruiters, applications, and hiring teams.

Crexi - Senior Front-End Engineer

Los Angeles / Remote | Jun 2021 - Jun 2026
  • Built and maintained production Angular/TypeScript features for a commercial real estate marketplace and SaaS platform serving external users and internal business teams.
  • Worked in a large Nx monorepo across multiple Angular applications and shared libraries; contributed to reusable components, feature modules, and frontend code organization.
  • Modernized Crexi's property map experience using Angular, Google Maps, deck.gl/WebGL overlays, and MVT/vector tile rendering to display dense national property data with better performance and maintainability.
  • Implemented responsive, data-rich interfaces and dynamic filtering workflows using Angular, TypeScript, RxJS, NgRx, Angular Signals, SCSS, and REST API integrations.
  • Supported public-facing SSR, SEO, and performance initiatives, including Lighthouse/Core Web Vitals investigation, rendering issues, and frontend performance debugging.
  • Helped reduce duplicated frontend patterns by consolidating shared logic and reusable UI approaches while keeping existing application boundaries stable.
  • Participated in CI/CD-driven delivery through pull requests, automated checks, build troubleshooting, release verification, and production regression analysis.
  • Used code reviews and AI-assisted engineering workflows to explore legacy code, plan refactors, debug production issues, and evaluate maintainable implementation tradeoffs.

Toolots - Senior Front-End Developer

Cerritos, CA | Sep 2018 - Jun 2021
  • Led frontend development for enterprise web and PWA applications using Angular 8-11, TypeScript, RxJS, NgRx, JavaScript, HTML, SCSS, Node.js, Material UI, and Flex Layout.
  • Architected and built Merchant Portal, a merchant-facing CRM/ERP web application used by 1,000+ merchants to manage inventory and platform details.
  • Built Gadget, an internal ERP/PWA application used by warehouse, operations, administrative, and cross-department teams on desktop, tablet, iPad, and mobile browsers.
  • Designed and implemented responsive UI features across mobile, tablet, desktop, and PWA workflows while maintaining cross-browser compatibility.
  • Partnered with backend engineers, product teams, and internal departments to translate dynamic business requirements into production frontend features.
  • Mentored junior developers, assisted with code reviews, and promoted maintainable frontend practices.

Solid Commerce - Software Engineer

Marina del Rey, CA | May 2017 - Jul 2018
  • Implemented Angular, JavaScript, HTML, CSS, and Node.js features for greenfield and legacy SaaS e-commerce applications.
  • Built responsive, pixel-accurate UI components from design mockups and product requirements in a structured SDLC environment.
  • Developed and maintained REST APIs using .NET/C# and created Swagger documentation for engineering and partner teams.
  • Contributed to UPS Marketplace Setup, a client-facing application used by 10,000+ UPS e-Fulfillment retailers to connect with marketplaces.
  • Modernized legacy user interfaces into Angular-based experiences and debugged UI/API issues across product, design, engineering, and QA teams.

Hack Reactor - Software Engineering Mentor / Associate Instructor

San Francisco / Remote | Dec 2016 - Apr 2017
  • Mentored 50+ prospective engineers in JavaScript, computer science concepts, modern frameworks, code reviews, and coursework support.
  • Coordinated educational events and mentor check-ins to support student progress, technical growth, and intervention strategies for common engineering anti-patterns.

Selected Highlights

Representative platforms and product areas from recent production work.

Crexi Mapping Platform

  • Modernized a national commercial real estate map using Angular, Google Maps, deck.gl/WebGL overlays, and MVT/vector tile rendering for dense property data.

Merchant Portal

  • Angular merchant-facing CRM/ERP application used by 1,000+ Toolots merchants to manage inventory and platform details.

Gadget ERP/PWA

  • Internal Toolots operations application used by warehouse and administrative teams across desktop, tablet, iPad, and mobile browsers.

UPS Marketplace Setup

  • Client-facing UPS e-Fulfillment marketplace connection app used by 10,000+ retailers, including UI development, REST APIs, and Swagger documentation.

Let's build useful software.

I am open to senior front-end engineering roles focused on Angular, React, TypeScript, enterprise SaaS, mapping platforms, and teams adopting practical AI-assisted development workflows.