Senior Frontend Engineer · Ottawa, ON

Justin Nguyen

Senior Lead Front End, Fire Products at ESO — architecting the NERIS Fire Incidents frontend, modernizing legacy stacks, and shipping AI-assisted workflows (TensorFlow.js, LLM PR review, Copilot/Cursor enablement) for teams across various products.

Years in software

AI initiatives shipped (on-device ML + PR automation)

Organizations across public safety & SaaS

About

Building interfaces that teams can scale

I’m a dedicated senior/staff-level engineer with 15+ years across full-stack work, with a strong lean toward frontend development, architecture, and raising the bar on quality. At ESO I architect the newest NERIS Fire Incidents frontend, collaborate across various teams, and lead legacy overhauls of AngularJS apps while keeping modern Angular apps current.

I’ve migrated flagship products from gulp + AngularJS to webpack + Angular 18+ with Confluence documentation that let various product teams upgrade faster. I mentor juniors through seniors on AI tooling (CoPilot, Cursor, Claude Code), and I care about Figma standards, component libraries, Sonar/Snyk gating, and tests to maintain high quality deployments.

Outside of work: travel, games, and cars — reminders that software should work for real people in messy environments.

Aggregate Movie Puller

Movie discovery UI with TMDb

Problem: Ship readable movie discovery without tangled fetches or DOM soup.
Outcome: Modular JS, keyboard-friendly UI, pattern you can extend with new endpoints.

React Native Animal Crossing companion app showing creature list and detail UI.

ACNH companion

React Native game data app

Focus: Lists, detail views, and touch-first patterns for dense catalogs.

Editor view of modular JavaScript files for API and UI sections.

AMP — architecture

Scalable client-side organization

Approach: Explicit module seams between API, view, and presentation—ready for tests and team onboarding.

Experience

Where I’ve shipped

Enterprise SaaS, public safety, and high-traffic mobile — always with an eye on craft and velocity.

Senior Lead Front End Developer, Fire Products

ESO · Ottawa, ON

June 2024 – Present
- Architected frontend of newest NERIS Fire Incidents flagship application.
- Collaborated with various teams on implementation including data team, DBA team, as well as EMS team looking to modernize their apps as well as ensuring proper data sharing and flow.
- Built custom AI machine learning model for NERIS app using TensorFlow.js. The model studies user behaviours and workflows to further automate and speed up incident reporting times by suggesting often-used value combinations.
- Teach junior, intermediate, as well as senior developers how to prompt and effectively use AI tooling in Cursor with using Plan mode in 4.6-opus while executing the builds with cheaper models.
- Leading overhaul of legacy applications using React, Redux, and Radix stateless libraries for internal component library.
- Rigorously maintain existing Angular applications ensuring they’re the latest 21 or latest JS maintained by Herodev.
Senior Front End Developer

ESO · Ottawa, ON

March 2022 – June 2024
- Help establish engineering team’s frontend forum to discuss best practices and discoveries among all the teams.
- Migrated older flagship NFIRS Fire Incidents product from gulp AngularJS to a custom webpack Angular 15 build along with writing extensive Confluence documentation detailing the transition. This allowed 6 different product teams to upgrade their application quickly following said documentation.
- Work with designers to set Figma design standards.
- Contribute to component library which is being used by all the modern apps.
- Aid converting mono repo projects into smaller app services in serverless push to Azure to better automate and scale services.
- Build E2E and unit tests and help QA team in building tooling for different environments.
- Coordinate with teams to set a standard code gating framework behind SonarCloud and automated tests.
Senior Front End Developer

Field Effect Software · Ottawa, ON

June 2020 – March 2022
- Lead the front end build of Cyber Range using a new, ground-up React framework to replace their original UI built in GWT.
- Used a combination of Redux for state management and various TanStack tools for data grids, routing, etc.
- Used WebSockets to update many UI states as VMs in Cyber Range update OS and network statuses live.
- Heavily contributed to company component library.
- Collaborated with UI designers and developers to make decisions on dependencies, tooling, and frameworks to be used company-wide.
- Implemented unit (Jest/Enzyme) and E2E (Webdriverio) testing suite and deployment automation via Bamboo and BitBucket.

Full Stack Developer

Spoonity · Ottawa, ON

October 2019 – June 2020
- Built out new REST API endpoints in PHP using Symfony framework to help optimize the frontend team’s workflow as well as build it to spec to make frontend development easier.
- Implemented rate limiting. This along with geolocation locks helped the company save upwards of $15,000/mo in computation costs.
- Refactored SQL queries and tables to filter and run queries more efficiently.
- Built AWS SNS backend leveraging native Apple Push as well as Google Firebase services to send push notifications to mobile apps.
Front End Developer

Spoonity · Ottawa, ON

April 2018 – October 2019
- Integrated partners' SDKs and plugins into mobile apps (both iOS and Android).
- Integrated Google Maps API/geolocation to automate self check-in for vendors who gave rewards or notifications based on the users’ proximity to their store location.
- Improved AngularJS and Angular/NodeJS front end mobile and desktop web applications including overhauling custom client UIs to be more user friendly as well as caching API request results to help speed up certain interactions.
- Built front end of company’s dashboard software via Angular 4 and updated it to version 7 alongside optimizing performance and bundle size.
- Built company’s SDK for clients who want to build their own custom app around the Spoonity API.
- Built and improved company’s app building automation process from development to app store via Jenkins server, Fastlane, Laravel, grunt, and gulp scripting/integrations.
UI Developer / Software Developer

GFI Systems · Regina, SK

July 2014 – April 2018
- Redesigned and developed company’s website from the using a simple HTML/CSS layout which was later converted to a WordPress PHP template.
- I was the designer for the product redesign and pushed it to be a web app instead of desktop app. Also the sole front end developer who developed company’s main SaaS web apps.
Contract Developer (Part-Time)

bv02 · Ottawa, ON

March 2014 – October 2017
- Developed WordPress sites (using PHP, HTML, CSS, JavaScript, etc.).
- Migrated content from old sites to new via WordPress and Sitecore.
- Worked with development team and project managers to meet close deadlines.
Web Developer

YouAchieve · Ottawa, ON

May 2011 – January 2014
- Developed company website.
- Provided support to customers through enhancing UI based on specific client requirements, providing technical support, and upgrading licensed software when required.
- Refactored and refined company’s licensed Learning Resource System (LRS) to improve customer flow, course consumption, and accuracy of progress tracking.
- Created promotional HTML email templates for email marketing blasts and support emails to make marketing content more engaging.
- Implemented and maintained company’s servers at Ottawa-based data centre. This involved physical storage swaps, server updates, etc.

Enterprise Angular and .NET stacks, plus React ecosystems where I lead greenfield and migrations — aligned with how I ship at ESO and Field Effect.

TypeScript & JavaScript
Angular & AngularJS
React & React Native
C# & .NET
Azure DevOps
Node.js
Figma
Magic Patterns
E2E & unit testing
TensorFlow.js
Cursor, Claude Code, & CoPilot

Justin Nguyen

Building interfaces that teams can scale

Selected work

Movie discovery UI with TMDb

React Native game data app

Scalable client-side organization

Where I’ve shipped

Senior Lead Front End Developer, Fire Products

Senior Front End Developer

Senior Front End Developer

Full Stack Developer

Front End Developer

UI Developer / Software Developer

Contract Developer (Part-Time)

Web Developer

Tools & focus