//hello world!

My name is
Guilherme Bermêo.

I'm a senior Frontend engineer and former ux designer from Brazil focused on web systems using Next.js.

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About.

Senior Frontend Developer and UX Analyst with 10+ years building responsive, high‑performance web apps. Expert in React, Next.js 14, TypeScript, Tailwind CSS, and MUI, with a track record modernizing legacy systems and leading front‑end delivery for nationwide government platforms at Brazil’s Attorney‑General’s Office (AGU). Architected data‑fetching and caching with TanStack Query and raised engineering standards with ESLint, SonarQube, and CI pipelines. Collaborates closely with back‑end (Nest.js, Oracle) and design (Figma) teams to ship accessible, maintainable interfaces. Google Associate Cloud Engineer; blends product thinking and high‑fidelity prototyping to deliver scalable, user‑centered UIs.

Experience.

  1. Senior Software Engineer
    @FirstDecision
    • Led front‑end development with Next.js 14, React, TypeScript, and MUI, improving UX and dev workflows.
    • Architected data‑fetching and caching layers with TanStack Query to optimize API interactions and performance.
    • Enforced code quality and consistency using ESLint rules, SonarQube scans, and automated CI pipelines.
    • Collaborated with back‑end (Nest.js, OracleDB) and design (Figma) teams to deliver scalable UI components.
    • Novo Promoção (2023–2025): Rebuilt a nationwide legal promotions platform for Brazil's Attorney‑General's Office (AGU), replacing a .NET legacy system. Engineered the UI in Next.js, React, TypeScript, and TanStack Query to handle complex business rules and high loads. Delivered an accessible, performant interface adopted across federal legal departments.
    12.2023 - Present
  2. Senior Frontend Engineer
    @TTY
    • Developed and maintained React/Next.js 13 applications with TypeScript, MUI, Tailwind CSS, and Cypress end‑to‑end tests.
    • Refactored legacy PHP front‑ends into modular React components, improving maintainability and performance.
    • Containerized services with Docker and deployed via Rancher; integrated Nest.js microservices for data processing.
    • Programa de Gestão e Desempenho (2023–2024): Co‑developed a performance management system for AGU with React, Next.js, TypeScript, and TanStack Query. Delivered features for goal‑setting, progress tracking, and automated feedback; system adoption studied in an FGV PhD thesis.
    04.2023 - 11.2024
  3. Frontend Engineer & UX Consultant
    @TTY
    • Built interactive components using React, Next.js 13, MUI 5, Tailwind CSS, and React‑Hook‑Form for enterprise applications.
    • Partnered with UX designers to translate wireframes into polished, accessible interfaces.
    • Managed deployments and microservices orchestration with Docker, Rancher, and Azure DevOps.
    09.2022 - 04.2023
  4. Frontend Engineer
    @AGU
    • Modernized internal legacy systems using HTML5, CSS3 (SASS, Tailwind), JavaScript/TypeScript, and PHP backends.
    • Standardized UI libraries (Bootstrap, Bulma) and introduced React and Vue.js components to enhance user workflows.
    • Ensured cross‑browser compatibility and accessibility compliance (WCAG 2.1).
    01.2022 - 09.2022
  5. Senior UX Designer
    @AGU
    • Led SCRUM teams to deliver user‑centered web interfaces for government applications.
    • Produced high‑fidelity prototypes in Figma and Adobe XD; ran usability tests and drove iterative improvements.
    • Collaborated with developers to integrate designs into production, maintaining visual consistency.
    09.2018 - 01.2022
  6. Operations Analyst & UX Designer
    @BBTS
    • Designed and prototyped banking interfaces using Axure RP, Figma, and Sketch.
    • Developed front‑end features for the Banco do Brasil mobile app; collaborated with back‑end teams on API integration.
    • Conducted UX research and A/B tests to validate design decisions.
    04.2015 - 09.2018
  7. Graphic Designer (Freelance)
    @Redbubble
    • Created and marketed original t-shirt and merchandise designs using Inkscape, GIMP, and Adobe Illustrator.
    • Managed end‑to‑end design projects, enhancing visual branding for online storefronts.
    10.2011 - 11.2014
  8. Administrative Assistant (Accounting Clerk)
    @CAER
    • Processed financial documents, maintained accurate records in TOTVS ERP and MySQL databases.
    • Supported month‑end closing activities and database reconciliation.
    06.2011 - 12.2012

Projects.

Novo Promoção made with React, Next.js, TypeScript, TanStack Query, MUI
Novo Promoção @First Decision
React
Next.js
TypeScript
TanStack Query
MUI
Programa de Gestão e Desempenho (PGD) made with React, Next.js, TypeScript, TanStack Query, MUI
Programa de Gestão e Desempenho (PGD) @TTY2000
React
Next.js
TypeScript
TanStack Query
MUI
Business Management Software made with Axure RP, Bootstrap, HTML & CSS
Business Management Software @BBTS
Axure RP
Bootstrap
HTML & CSS
Unio made with Figma, Adobe XD
Unio @AGU
Figma
Adobe XD
Alura's React Bootcamp made with React, Vercel, Git, HTML & CSS
Alura's React Bootcamp
React
Vercel
Git
HTML & CSS
SAD.Atende made with HTML & CSS, Figma, Gimp, PHP
SAD.Atende @AGU
HTML & CSS
Figma
Gimp
PHP

Education.

Courses.

  • 2022
    React Complete with Hooks
    Origamid.dev
    36h
  • 2021
    Motion Design
    Alura
    110h
  • 2021
    Game Design
    Alura
    60h
  • 2019
    Agile Scrum Methodology
    SENAC (Brasília, DF)
    20h
  • 2016
    HTML & CSS
    Alura
    52h
  • 2012
    Administrative Assistant
    SENAI (Boa Vista, RR)
    800h

Certificates.

  • 2025
    Associate Cloud Engineer Certification (CERT‑A‑ACE: 163700)
    Google
  • 2023
    IELTS 6.5 General Training
    Cambridge University Press & Assessment
  • 2021
    Diplome d'Etudes en Langue Française (DELF) A2
    Alliance Française de Brasília
  • 2019
    Scrum Foundation Professional Certificate
    CertiProf

Skills.

  • React
  • Next.js
  • HTML & CSS
  • TypeScript
  • React Native
  • Figma
  • JavaScript
  • Tailwind CSS
  • TanStack Query
  • MUI
  • Git
  • Vue.js
  • Angular
  • Bootstrap
  • Node.js
  • Google Cloud (GCP)
  • Docker
  • Unity
  • Adobe XD
  • Axure RP
  • Sketch
  • C#
  • Blazor
  • Azure DevOps
  • Vercel
  • SonarQube
  • MySQL
  • Oracle SQL
  • GraphQL
  • GitLab
  • Rancher
  • Firebase
  • React Hook Form
  • Zod
  • DBeaver
  • Expo
  • Cypress
  • Nest.js
  • Illustrator
  • Logic Pro
  • Lightroom
  • PowerApps
  • SASS
  • Bulma
  • PHP
    • Approved in the LinkedIn Skills Assessment Test.

Side Projects.

  • 2023

    Digital Game Development Postgraduate Thesis: Leitmotif, Sound Design, Horizontal Re-sequencing & Vertical Re-orchestration: An Introduction to Narrative in Music

    Authored a 34 pages thesis exploring the evolution and application of narrative elements in music, specifically focusing on leitmotif, sound design techniques, horizontal re-sequencing, and vertical re-orchestration. This research analyzed how these concepts influence narrative construction and player immersion in digital games, drawing examples from classical music, cinema, and contemporary game titles like The Legend of Zelda: Breath of the Wild and Journey. The work demonstrates expertise in audio design principles, analytical research, and the intersection of music theory with interactive media development.

  • 2022

    A1Z26 - O Enigma do Sol Oculto

    Developed a web-based A1Z26 cipher tool. This utility was built to prevent conversion and summing errors for a Brazilian Choose Your Own Adventure gamebook, 'O Enigma do Sol Oculto', facilitating gameplay by providing accurate number conversions for in-game enigmas.

  • 2022

    QMK Contributions on CRKBD and BM40v2

    Developed and published a keymap optimized for neo-Latin languages and UX/UI/Frontend designers, incorporating advanced features like custom RGB Matrix LED colors and OLED programming.

  • 2022

    CØЯЯuptΞd cØding дЯt

    Developed a creative coding project utilizing JavaScript and the canvas-sketch library to generate digital art. This project, completed following a specialized course, demonstrates a practical application of programming skills combined with artistic and design principles for creating compelling experimental visual outputs.

  • 2020

    Come Out Fighting

    A game jam turn-based strategy game, developed in C# and Unity 3D. Contributed to game design, music composition, and audio design. The game features a unique soundtrack and mechanics such as random tile destruction and resource management for an M4 Sherman tank crew escaping World War II Germany.

  • 2022

    Westworld Scoring

    Composed and produced orchestral soundtrack music for a Spitfire Audio & HBO Scoring competition. The project was developed in Logic Pro X and included a 10-minute orchestral score with 100+ tracks, featuring a mix of classical and contemporary elements.

  • 2017

    Liberte-se

    A 2017 documentary short film directed by Danielle Oliveira that explores themes of freedom and human connection through intimate visual storytelling. In my multifaceted role of co-director, director of photography and film editor, I contributed to shaping the film’s visual identity and its narrative rhythm.

  • 2014

    Cthulhu Ate My Soldiers

    Developed for the GameBoy Jam 3, it combines classic tower defense mechanics with Smash Bros.-style fighting elements. The game features captivating GameBoy Pocket-inspired art and boasts three original chiptune compositions. Players take on the role of Cthulhu, charged with safeguarding humanity from self-destruction through irrational acts. The project was built with Unity 3D and incorporates an achievement system to enhance replayability. My contribution to this project was to game design, art, and coding.