Available for senior roles · Remote / Los Angeles

Emmanuel De Freitas

Senior Software Engineer Frontend & AI Product Engineering

I build fast, accessible products at the seam of interface and intelligence — React/TypeScript on the front, Node and cloud on the back, and LLM-driven features woven through. A decade shipping web, mobile, and design systems for teams from startups to the Big Four.

Get in touch
10+
Years shipping
4
Platforms · web · Expo · desktop
20+
Products delivered
TS·AI
Core focus
01 — Profile

A generalist who ships, with a specialist's obsession for the interface.

Senior engineer with 10+ years across React, React Native, and native iOS, now focused on AI-driven product experiences. I turn ambiguous problems into shipped, accessible interfaces — owning the work from design system to deployment, and mentoring the teams that keep it alive.

Frontend architecture AI / LLM integration React & React Native Design systems Accessibility (a11y) Cloud & CI/CD
02 — Experience

Where I've shipped.

Selected roles from a decade of engineering across startups, healthcare, civic tech, and enterprise consulting.

Jun 2025 — Mar 2026 The Motley Fool Contract · Remote

React Native Developer

  • Maintained and upgraded the official React Native (Expo) app for stock management at The Motley Fool.
  • Implemented feature improvements and resolved bugs to sharpen the in-app user experience.
  • Collaborated with cross-functional teams to keep app functionality and performance seamless.
Apr 2025 — Jun 2025 High Fidelity Sr. Front End Engineer

Sr. Front End Engineer

  • Built and extended real-time audio/video features for the Quad app via the Agora SDK API, wired up with Python.
  • Engineered the frontend UI and canvas rendering with Svelte and PixiJS for smooth drawing of complex canvas objects.
  • Used Cursor AI to plan feature implementation and document the cost/performance strategy.
Feb 2025 — Apr 2025 PwC Full Stack Developer

Full Stack Developer

  • Joined an MVP initiative to automate the auditing process and requirement validation with AI assistance.
  • Contributed to a microfrontend React app — implementing feature specs and growing the internal UX design system components.
  • Supported the BFF (Backend-for-Frontend) layer in .NET / C#, developing in VS Code.
  • Ran code reviews on Azure DevOps and improved unit-test coverage and CI automation.
Nov 2024 — Feb 2025 CurbsideSOS Senior Software Engineer

Senior Software Engineer

  • Led a React Native rewrite that lifted the App Store rating from 3.8 to 4.7 and crash-free sessions to 99.5%.
  • Cut cold-start time ~45% through bundle splitting and native-module optimization.
  • Built a live dispatch dashboard in React + D3.js visualizing 1k+ concurrent roadside requests.
Feb 2022 — 2024 OpSource Senior Software Engineer

Senior Software Engineer

  • Delivered a B2B SaaS platform on AWS (Node · PostgreSQL) that scaled to 200k+ monthly API requests.
  • Introduced GitLab CI/CD, dropping deploy time from 30 min to 4 min and raising test coverage to 85%.
  • Mentored 4 engineers and established the team's TDD and design-system practices.
2018 — 2022 Watchtower WHQ Product Owner · SWE

Product Owner

2020 — 2022
  • Ran Scrum / Agile management for the team.
  • Owned UX lead & strategy across the product.
  • Drove technical discussions on cost, risk, and time estimates, with quarterly reporting to the PM.
  • Led, recruited, and trained UX designers across the world.

Software Engineer

2018 — 2020
  • Built a Vue.js + Electron frontend for an MVP text-editor app supporting multilanguage scripts and Unicode input.
  • Bridged and consumed text-processing APIs from the Foundation Services team using Python.
2015 — 2017 DocSites Principal Software Developer

Principal Software Developer

  • Delivered client web platforms end-to-end — architecture, build, and launch — as lead developer.
  • Owned front-end delivery across concurrent client projects, standardizing reusable UI components.
  • Developed custom WordPress plugins and reusable themes for content-builder features and data connectors to marketing platforms.
03 — Stack

The toolkit.

Depth in the frontend and product layer, with the full-stack and cloud range to own a feature end-to-end.

Frontend & Mobile

ReactNext.jsReact Native TypeScriptReduxVue.js AngularTailwind CSSSwiftUI iOS · SwiftPWAs

AI / SDD

LLM integrationAI SDKAgentic workflows Agent builderCustom MCPsSpeckit QuantizationPython

Backend & Data

Node.jsExpressGraphQL FastAPIFastMCPPostgreSQL MongoDBFirebaseREST uvPyPI packagingC# · .NET

Cloud & DevOps

AWSAzureGCP DockerCI/CDGitLab CI

Practices

System designDesign systemsTDD Agile · ScrumWeb accessibilityUnit & E2E testing UX lead & researchPerformance tuningCross-functional leadership
04 — Foundations

Education & certifications.

Education

Associate Degree, Computer Science
Brevet de Technicien Supérieur · Development — Université Paris Nanterre, France · 2010
Baccalauréat Scientifique
Lycée Georges Braque · Argenteuil, France · 2006

Certifications

CSM Certified ScrumMaster
LNDA Become a Full-Stack Web DeveloperLinkedIn Learning 2019 React: Using TypeScriptLinkedIn Learning Node Node.js Essential TrainingLinkedIn Learning SQL NoSQL Essential TrainingLinkedIn Learning
Let's build

Have a hard interface problem?
I like those.

Open to Senior Frontend, Full-Stack, and AI product engineering roles — remote or Los Angeles.

emmanuel@exegia.co Connect on LinkedIn
© 2026 Emmanuel De Freitas Built with HTML, CSS & a little JavaScript · No frameworks.