Lucas Borges

Currently at Hostfully

Lucas BorgesSenior Frontend Engineer

I modernize product frontends — the architecture, the quality systems around it, and the interfaces people actually use.

From internal Google tooling and investment platforms to the hospitality products I build today with a US team, fully remote from Brazil, with AI agents as part of how I work.

View experienceSelected work
building for the web
10+ years
remote with US product teams
Since 2021
Belo Horizonte, Brazil
UTC−3
native / bilingual
EN · PT

01About

10 years of frontend, from consultancy to product.

I’m a frontend engineer working mostly in React and TypeScript. Over the past decade I’ve built investment and portfolio tools, logistics platforms, internal Google tooling, and hospitality products — for consultancies, for clients, and for product teams in the US.

The thread through all of it is sustainability: modular architecture, test strategy, static analysis, and automation that let a team move quickly without accumulating risk. At Hostfully, I’m rebuilding the Digital Guidebooks product in stages while keeping the legacy application stable for the people who rely on it.

AI has reshaped how I build. I connect agents to the team’s real context through MCP servers for Figma, Jira, and our component library. I write reusable skills and prompts, and I plan work up front so autonomous agents can carry it out while tests and static analysis hold the quality bar.

I work closely with designers to find the best experience within real technical constraints, and I enjoy mentoring junior and mid-level engineers.

I came to software from engineering: a B.E. in Energy Management and Planning, with an exchange at Indiana Institute of Technology, followed by a graduate degree in Software Engineering. I’m now completing a postgraduate degree in Applied AI Engineering.

02Experience

Where I’ve done the work.

Remote with US product teams since 2021, and 5+ years at CI&T before that, delivering for clients including Google and Invesco.

  1. Hostfully

    Property management software for short-term and vacation rentals.

    2024 – Present · 2 yrs 7 mos

    Remote

    1. Senior Frontend Engineer

      Apr 2024 – Present · 2 yrs 7 mos · Remote · Brazil

      Modernizing the Digital Guidebooks product — the guides hosts build and guests use throughout their stay.

      • Rebuilding the Guidebook Host and Guest applications in stages on a new foundation focused on performance, compatibility, and a modern UI.
      • Stabilized and adapted parts of the legacy UI, integrating applications through micro-frontends and embedded frames.
      • Introduced a modular architecture with documentation and contribution guidelines, static analysis, a unit/component/E2E test pyramid, and proactive monitoring.
      • Working AI-natively: MCP servers (Figma, Jira, MUI, and others) give agents the design, ticket, and component context; reusable skills and prompt engineering keep their output consistent; written plans guide autonomous agents through implementation.
      • Applied AI tooling to automate parts of the development workflow, shortening CI/CD cycles and producing release documentation through semantic releases.
      • React
      • TypeScript
      • TanStack Query
      • TanStack Router
      • MUI
      • Zod
      • OpenAPI
      • Vitest
      • Cypress
      • MCP
      • AI agents
      • Google Cloud
      • Google Maps Platform

  2. Loadsmart

    Freight and logistics technology company.

    2021 – 2023 · 2 yrs 5 mos

    Remote

    1. Senior Frontend Engineer

      Aug 2021 – Dec 2023 · 2 yrs 5 mos · Remote · Brazil

      Improved internal and customer-facing logistics tools across user experience, application maturity, and new features.

      • Built Web Components for the company design system.
      • Shipped features across React/Redux and Angular codebases, including map-based and data-visualization interfaces.
      • React
      • Redux
      • Angular
      • TypeScript
      • Web Components
      • Jest
      • Testing Library
      • Cypress
      • Google Maps
      • Chart.js

  3. CI&T

    Global digital technology services company headquartered in Brazil.

    2016 – 2021 · 5 yrs 7 mos

    1. Senior Frontend Engineer

      Client: Invesco

      Sep 2020 – Aug 2021 · 1 yr · Belo Horizonte

      Built a technically demanding platform for investment analysis, portfolio management, benefits analysis, and projections.

      • Developed data-dense financial interfaces with complex grids and interactive charts.
      • React
      • Redux
      • Material UI
      • AG Grid
      • amCharts

    2. Frontend Engineer

      Client: Google and an investments client

      Mar 2018 – Sep 2020 · 2 yrs 7 mos · Belo Horizonte

      Contributed to an internal Google project focused on reliability and user experience, and delivered specialized frontend work for an investments client.

      • Enforced code quality in CI with SonarQube, JSHint, and ESLint.
      • Worked beyond the frontend on Python APIs, unit tests, and integration services.
      • Expanded use of Google Cloud: Cloud Functions (Node.js), Pub/Sub, and Dataflow.
      • Delivered a React/Redux/Material UI frontend for an investments client that was praised as functional, modern, and reliable.
      • React
      • Redux
      • Material UI
      • Python
      • Node.js
      • Google Cloud
      • Jest
      • Enzyme
      • Nightwatch.js
      • SonarQube
    3. 2 earlier roles2016 – 2018

      1. Junior Software Engineer

        Mar 2017 – Mar 2018 · 1 yr 1 mo · Belo Horizonte

        Frontend-focused development on Google Cloud Platform services within a Kanban process centered on CI metrics and quality assurance.

        • Built on BigQuery, App Engine, Search API, Cloud Storage, Cloud Endpoints, Datastore, and Firebase.
        • JavaScript (ES6)
        • AngularJS
        • AngularJS Material
        • Karma
        • Jasmine
        • Python
        • Java
        • Google Cloud

      2. Intern

        Feb 2016 – Mar 2017 · 1 yr 2 mos · Belo Horizonte

        Helped build an application for a major client with strict quality and security requirements.

        • Adopted an agile process with quality and feedback metrics enforced in CI.
        • JavaScript
        • Java
        • Python
        • AngularJS
        • Jasmine
        • Gulp
        • Jenkins
        • Google App Engine

03Expertise

What I bring to a team.

Grouped by the problems they solve. marks a core strength.

  • Frontend

    The core of my work for a decade: typed, component-driven interfaces.

    • TypeScript
    • React
    • JavaScript
    • HTML & CSS
    • TanStack Query
    • TanStack Router
    • Redux
    • Angular
    • AngularJS
    • Web Components

  • AI-native engineering

    Agents in the daily workflow, with the context and guardrails to do real work.

    • Agentic development workflows
    • Model Context Protocol (MCP)
    • Autonomous agents
    • Prompt engineering
    • Agent skills
    • Plan-driven implementation
    • Figma, Jira & MUI MCP servers
    • LLM fundamentals

  • Architecture

    Structures that keep large frontends changeable as teams and products grow.

    • Modular frontend architecture
    • Micro-frontends
    • Design systems
    • Incremental legacy modernization
    • Schema validation (Zod)
    • API contracts (OpenAPI)
    • Mobile-first, responsive UI
    • Internationalization

  • Quality & delivery

    Testing, analysis, and pipelines built into the workflow rather than bolted on.

    • Test pyramid strategy
    • Vitest
    • Jest
    • Testing Library
    • Cypress
    • Static analysis (SonarQube, ESLint)
    • Monitoring & observability
    • CI/CD
    • Semantic release
    • Git

  • Data-rich interfaces

    Grids, charts, and maps for finance, logistics, and hospitality.

    • AG Grid
    • amCharts
    • Chart.js
    • Google Maps Platform
    • Material UI

  • Cloud & backend

    Enough of the stack to own features end to end.

    • Google Cloud Platform
    • Cloud Functions (Node.js)
    • Pub/Sub & Dataflow
    • BigQuery & Datastore
    • Firebase
    • Python
    • Java

04Selected work

Case studies from the field.

Most of my work lives in private, production codebases, so these are told as engineering stories rather than screenshots.

  1. 01Hostfully · 2024 – Present

    Digital Guidebooks

    A staged rebuild of the Guidebook Host and Guest applications, delivered while the legacy product stayed live.

    Challenge

    A legacy guidebook application needed a modern foundation without disrupting the hosts and guests using it every day.

    Approach

    • Stabilized the legacy UI and bridged old and new applications with micro-frontends and embedded frames.
    • Replaced the Host and Guest apps in stages on a stack chosen for performance, compatibility, and a modern UI.
    • Defined a modular architecture with contribution guidelines, static analysis, a full test pyramid, and monitoring.
    • Automated parts of the workflow with AI tooling and semantic releases, improving CI/CD efficiency.
    • React
    • TypeScript
    • TanStack Query
    • TanStack Router
    • Zod
    • OpenAPI
    • Vitest
    • Cypress

  2. 02Hostfully

    AI-native delivery workflow

    Agents as part of everyday product engineering: grounded in real project context, guided by plans, and held to the same quality bar.

    Challenge

    Bring AI agents into day-to-day frontend work on a production codebase without lowering the architecture and quality standards.

    Approach

    • Connected agents to the team’s context through MCP servers: Figma for designs, Jira for tickets, MUI for component documentation, and more.
    • Wrote reusable skills and engineered prompts so agents follow the project’s conventions.
    • Planned work up front, then delegated implementation to autonomous agents.
    • Kept tests, static analysis, and semantic releases as the gate every change passes through.
    • MCP
    • AI agents
    • Agent skills
    • Prompt engineering
    • Figma
    • Jira
    • MUI

  3. 03Loadsmart · 2021 – 2023

    Design system components

    Web Components for Loadsmart’s design system, alongside internal and customer-facing logistics tools.

    Challenge

    Improve internal and client-facing logistics tools — user experience, application maturity, and features — while contributing to the design system.

    Approach

    • Built Web Components for the design system.
    • Improved user experience and application maturity across internal and client-facing tools.
    • Delivered map and data-visualization features with Google Maps and Chart.js.
    • Web Components
    • React
    • Redux
    • Angular
    • TypeScript
    • Cypress

  4. 04CI&T for Invesco · 2020 – 2021

    Investment & portfolio platform

    Investment analysis, portfolio management, benefits analysis, and projections in one technically demanding tool.

    Challenge

    An ambitious, technically challenging financial product spanning investments, portfolios, benefits analysis, and projections.

    Approach

    • Built data-heavy views with AG Grid and interactive projections with amCharts.
    • Structured application state with Redux on a Material UI foundation.
    • React
    • Redux
    • Material UI
    • AG Grid
    • amCharts

Also

  • Internal Google project

    Contributed to an internal Google project as it matured toward reliability and a better user experience.

    CI&T for Google · 2018 – 2020

05Education & learning

An engineer by training, still studying.

  1. 2026 – 2027

    Postgraduate degree, Applied AI Engineering

    UNIPDS

    In progressMEC-recognized · Anhanguera

    A year-long program for software engineers on putting AI into production systems, from LLM fundamentals to autonomous agents and AI-first architecture, closing with a capstone project.

    • LLM fundamentals
    • Generative AI APIs
    • Prompt engineering
    • Model Context Protocol (MCP)
    • Autonomous agents
    • AI systems architecture
    • Fine-tuning
    • AI for UX, DevOps & project management
    • AI security & governance
    About the program

  2. 2015 – 2016

    Graduate degree, Software Engineering

    Pontifícia Universidade Católica de Minas Gerais · PUC Minas

  3. 2012 – 2013

    Bachelor of Engineering coursework, Energy Management and Planning, production technology, and business

    Indiana Institute of Technology · Indiana Tech

    Exchange program

  4. 2008 – 2013

    Bachelor of Engineering, Energy Management and Planning

    Pontifícia Universidade Católica de Minas Gerais · PUC Minas

Honors

  • Young Researcher
  • Student Leader
  • Participant · 3rd World Congress of Engineers

06Approach

How I work.

  1. 01

    Modernize without stopping the product

    Rebuild in stages, bridge old and new, and keep users unaffected while the foundation changes underneath them.

    Hostfully

  2. 02

    Quality is a system, not a phase

    Test pyramids, static analysis, and CI gates make quality the default outcome instead of a late-stage check.

    Hostfully · CI&T

  3. 03

    Architecture that scales with the team

    Modular boundaries, shared components, and clear contribution rules let more people work safely in one codebase.

    Hostfully · Loadsmart

  4. 04

    UX is an engineering concern

    Work alongside designers to find the best experience inside real constraints — mobile-first, responsive, and fast.

    Hostfully · Loadsmart · CI&T

  5. 05

    Plan first, then delegate

    Give agents real context through MCP, a written plan, and reusable skills. Let them take the repetitive work, and keep tests and static analysis as the gate.

    Hostfully

  6. 06

    Raise the people around you

    Mentor junior and mid-level engineers, share practices openly, and treat change as an opportunity to learn.

07Contact

Let’s build something great.

Email is the fastest way to reach me. I’m also on LinkedIn and GitHub.