Gabriel is available for hire
Hire GabrielGabriel Siedler
Verified Expert in Engineering
Senior Full-stack Developer
Florianópolis - State of Santa Catarina, Brazil
Toptal member since October 5, 2016
Bio
Gabriel builds products on top of LLMs, and he gets called when the AI part has to be trusted, not just demoed. He is taking a multi-tenant PWA built with Vibe coding into production, where he found a tenant data isolation bug before writing any new code. On an AI coaching app with paying subscribers, deterministic rules generate the plan, a validator blocks unsafe output, and a suite of athlete profiles catches regressions. Before AI, he spent 15 years building with C++, React, and Node.js.
Portfolio
StoryScape
JavaScript, React, Vercel, Netlify, Supabase, API Integration, Web Applications...
Darrell Ventures LLC
Mobile App Development, Full-stack, Full-stack Development...
INPunto
React Native, Minimum Viable Product (MVP), Technical Leadership, Team Building...
Experience
- Algorithms - 20 years
- Full-stack - 12 years
- Node.js - 11 years
- React - 11 years
- Software Architecture - 9 years
- TypeScript - 8 years
- Agentic AI - 2 years
- AI Agents - 2 years
Work Experience
Full-stack Engineer
2026 - PRESENT
StoryScape
- Identified a cross-tenant data isolation gap (RLS that did not actually isolate schools) before writing any new feature code.
- Replaced a hardcoded single-tenant app with configuration-driven onboarding, letting a new school launch via a config file instead of new code.
- Delivered the first phase of a tenant-management admin panel beyond the original scope, within the same budgeted hours.
- Found and fixed UX issues through hands-on testing and product experience.
- Added full mobile screen support and PWA capabilities.
- Set up a GitHub Projects board so the client could track tasks and requirements with full transparency.
Technologies: JavaScript, React, Vercel, Netlify, Supabase, API Integration, Web Applications, AI Engineering, LLM Agents
Full-stack Engineer
2026 - PRESENT
Darrell Ventures LLC
- Designed a four-layer architecture (rules, LLM-selected parameters, a validator, and a 50-profile regression suite) replacing open-ended chat as the source of AI training prescriptions.
- Flagged missing medical disclaimers and gaps in the terms of service on an app already live.
- Benchmarked several current LLM models on cost and output quality to choose the one powering the coaching engine in production.
- Led implementation of a full React Native redesign from Figma specs, shipping numerous usability fixes from hands-on product use.
Technologies: Mobile App Development, Full-stack, Full-stack Development, Artificial Intelligence (AI), Claude Code, Agentic AI, React, TypeScript, Amazon Web Services (AWS), Google Cloud, Push Notifications, Training, Minimum Viable Product (MVP), Chatbots, Fitness, User Interface (UI), User Experience (UX), JavaScript, iOS, Android, React Native, LLM Agents
Advisory CTO
2024 - 2026
INPunto
- Built the first React Native prototype from scratch, validating the software MVP for a portable molecular diagnostics platform.
- Recruited the product designer and selected the software and hardware contractors, assembling the full delivery team from the ground up.
- Oversaw two external teams, software and hardware, that shipped a portable point-of-care diagnostics device now patent-pending in Brazil.
- Advised the founders on technology strategy and vendor decisions, keeping the software and hardware tracks aligned to the product roadmap.
- Guided delivery of a LAMP-based diagnostics platform that returns results in hours instead of days, at over 50% lower cost than lab testing.
Technologies: React Native, Minimum Viable Product (MVP), Technical Leadership, Team Building, Product Strategy, Mobile App Development, Figma to React, Front-end Development, NPM, Startups, Early-stage Startups
Full-stack Developer
2024 - 2026
Araceli Biosciences Inc.
- Architected a real-time, viewport-driven image rendering pipeline across C++ back-end and TypeScript client, replacing full-image transfers with on-demand region streaming for fluid zoom and pan on gigapixel microscopy plates.
- Engineered a pixel-level inspection tool ("pixel spy") with sub-pixel coordinate mapping between rendered viewport and source image space, enabling scientists to interrogate raw intensity values at any zoom level.
- Rebuilt the intensity histogram subsystem end-to-end with thread-safe cancellation, per-FOV granularity, and channel-aware aggregation — eliminating a class of race conditions that previously corrupted analytics under concurrent load.
- Led a full-stack modernization of the application's state management layer, migrating 15+ feature domains to a typed, predictable architecture and authoring the data-flow rules now enforced across the codebase.
- Delivered end-to-end multi-depth (Z-slice) acquisition and analysis, from capture-time controls and state persistence through MIP defaults, downstream visualization, and per-slice pixel inspection across every workflow.
- Drove cross-stack support for a new high-throughput plate format, parameterizing region geometry, intensity analytics, histogramming, and thumbnails across the product - opening a new customer segment for the instrument.
- Cut perceived image-load latency dramatically by introducing thumbnail and full-image caching, hybrid memory-plus-disk loading, smart-debounced back-end calls, base64 and binary TCP transport, and parallel TIFF tile reads.
- Hardened the image-processing service for production scale: tightened mutex and thread-pool behavior, added robust cancellation propagation, and resolved long-standing zombie-state and race-condition bugs affecting end users.
- Re-architected channel-aware intensity and aggregation data flow so per-channel enablement, auto-min/max, and ratio metrics propagate cleanly from acquisition through analysis, visualization, and CSV export.
- Modernized cross-process image transport with multiple output formats and quality controls (PNG, AVIF, 16-to-8-bit conversion), batch generation endpoints, and extended-path file support for enterprise deployments.
Technologies: TypeScript, JavaScript, C++, HTML, CSS, JSON, React, Redux, Redux Toolkit, Redux Persist, React Router, React Hooks, Fluent UI, Griffel, Webpack, ESLint, Prettier, Jest, Electron, IPC, contextBridge, Node.js, C++17, Multithreading, Concurrency, Mutexes, Atomics, Thread Pools, Winsock API, TCP Sockets, Binary Protocols, RAII, Smart Pointers, Exception Handling, OpenCV, TIFF, PNG, AVIF, Base64, RLE, Tile-based Rendering, Image Caching, Flat-field Correction, Histogram Analysis, Pixel-level Inspection, MongoDB, Application State Management, Event-driven Architecture, Performance Optimization, Memory Management, Refactoring, Git, Scientific Data Analysis, Microscopy, Life Science, Problem Solving, User Interface (UI), Dashboards, Data Visualization, Charts, RESTFul APIs, D3.js, APIs, API Integration, Data Structures, Medical Imaging, AI Tools, Database Management, Claude Code, Claude, Anthropic, Agentic AI, Software Architecture, REST APIs, User Experience (UX), Large Language Models (LLMs), Architecture, Responsive Web Design (RWD), UI Design, UX Design, Web Design, SaaS, Troubleshooting, Relational Databases, AI-assisted Development, Figma to React, Front-end Development, Server-side Rendering (SSR), NPM, Analytics
Front-end JavaScript Developer
2024 - 2024
Doowii
- Refactored and modernized a large-scale educational platform from the ground up, transforming an unstable MVP into a production-ready product with improved architecture, maintainability, and scalability.
- Implemented pixel-perfect UI/UX based on design specifications, while fixing hundreds of bugs across the application to significantly improve reliability, performance, and overall user experience.
- Developed and optimized real-time data fetching flows and LLM-powered features, enabling responsive AI-driven educational interactions and seamless live updates throughout the platform.
Technologies: JavaScript, TypeScript, React, Google Cloud Platform (GCP), Front-end, Edtech Design, Artificial Intelligence (AI), Firebase, BigQuery, Figma, User Interface (UI), Data Visualization, Dashboards, Charts, RESTFul APIs, API Integration, Data Structures, AI Tools, Database Management, Cloud, Minimum Viable Product (MVP), Software Architecture, REST APIs, OAuth, User Experience (UX), Architecture, Responsive Web Design (RWD), UI Design, UX Design, Web Design, Web Development, SaaS, Troubleshooting, AI-assisted Development, Figma to React, Front-end Development, AI Integration, NPM, Startups, Early-stage Startups, Analytics, Web Applications
Front-end Specialist
2021 - 2024
Bruker
- Built an app from the ground up to manage embedded analysis runs and visualize their results, which contain biomolecular information.
- Engineered sophisticated components and application states, facilitating the dynamic visualization and manipulation of DNA chains and traces.
- Developed the application's front end as the sole developer, collaborating seamlessly with a team of four back-end developers.
- Engaged actively with the scrum master, product owner, and team members, contributing to the successful fulfillment of intricate project requirements through effective communication and collaboration.
Technologies: React, D3.js, TypeScript, Redux, Visx, Styled-components, Docker, Axios, Web, Front-end, Front-end Development, User Interface (UI), Dashboards, Data Visualization, Charts, RESTFul APIs, APIs, Python, API Integration, Data Structures, Medical Imaging, Database Management, Software Architecture, User Experience (UX), Architecture, Responsive Web Design (RWD), SaaS, Troubleshooting, Figma to React, Server-side Rendering (SSR), NPM, Web Applications
Content Creator
2022 - 2023
Toptal, LLC
- Innovated and developed new technical challenges to enhance the effectiveness of the screening process for prospective candidates.
- Conducted thorough reviews of front-end documentation, significantly improving recruiter awareness and ensuring precise matching of developers to engagements.
- Spearheaded various internal projects at Toptal, contributing to the overall efficiency and success of the team.
Technologies: JavaScript
Developer Screener
2022 - 2023
Toptal, LLC
- Conducted screening interviews to evaluate candidates' skills, ensuring a rigorous selection process for entry into Toptal's esteemed developer team.
- Coordinated daily interviews efficiently with developers worldwide, fostering a diverse and dynamic talent pool.
- Contributed actively to weekly meetings to enhance and refine the overall screening and hiring process.
- Designed and implemented algorithmic challenges and tasks to evaluate candidates' programming skills effectively, ensuring a comprehensive assessment aligned with Toptal's standards.
Technologies: JavaScript, Algorithms, Troubleshooting
Full-stack Engineer
2022 - 2022
Eran Balter
- Developed an app based on an existing codebase using React, TypeScript, and Redux. Created the server-side part from scratch using Socket.IO and PostgreSQL.
- Transformed a regular app into a multiplayer service with real-time interaction.
- Accomplished MVP requests before the deadline, allowing me to add more features.
- Created very complex features inside an existing codebase.
Technologies: JavaScript, React, Node.js, Full-stack, Socket.IO, TypeScript, Minimum Viable Product (MVP), Responsive, Full-stack Development, User Interface (UI), RESTFul APIs, APIs, API Integration, Real-time Data, WebSockets, Database Management, Cloud, Software Architecture, OAuth, User Experience (UX), Architecture, Responsive Web Design (RWD), Web Development, Websites, Troubleshooting, Relational Databases, Front-end Development, NPM, Startups, Early-stage Startups, Web Applications
Senior Full-stack Developer
2017 - 2021
AE Studio
- Worked for great clients like Samsung for more than four years.
- Contributed to at least 15 projects—most of them with the JavaScript stack.
- Architected projects and managed developers on several projects.
Technologies: PostgreSQL, Node.js, Angular, Ionic, React, React Native, MongoDB, Styled-components, Heroku, JavaScript, Express.js, TypeScript, HTML5, CSS, CSS3, Sass, SCSS, Next.js, Full-stack, Full-stack Development, Startups, Product Development, APIs, SQL, Web Development, Website Performance, REST, Front-end, Back-end, JSON Web Tokens (JWT), React Hooks, NoSQL, Git, API Development, ES5, REST APIs, Mobile Development, Android, iOS, Technical Leadership, Mobile, Front-end Development, Back-end Development, Electron, User Interface (UI), DocuSign, Dashboards, Charts, RESTFul APIs, D3.js, Python, Highcharts, API Integration, Data Structures, Real-time Data, WebSockets, Database Management, Cloud, Minimum Viable Product (MVP), Software Architecture, OAuth, Google Calendar API, GraphQL, User Experience (UX), Architecture, Responsive Web Design (RWD), Websites, SaaS, Troubleshooting, Relational Databases, Mobile App Development, NPM, Expo, Analytics, Web Applications
Full-stack Developer
2017 - 2017
Shirt App (via AE Studio)
- Joined the team to help solve bugs due to the app's enormous complexity.
- Assisted in building the ionic logic that enabled editing HTML shapes on the fly.
- Helped manage the back-end state to replicate the front-end design, building the final art and shipping it to the selling platform.
Technologies: Node.js, Ionic, Canvas, Shopify, User Interface (UI), RESTFul APIs, APIs, API Integration, Data Structures, Database Management, Minimum Viable Product (MVP), REST APIs, User Experience (UX), Responsive Web Design (RWD), Web Development, Troubleshooting, Relational Databases, Mobile App Development, Front-end Development, Web Applications
Front-end Developer
2017 - 2017
DVN (via AE Studio)
- Created the front end from scratch using React, Redux, and the styled-components library.
- Followed Zeplin files to create the new pages and adapted them to Bootstrap for a fully responsive website.
- Collaborated with a back-end developer to accomplish tasks.
Technologies: Styled-components, Redux, React, User Interface (UI), RESTFul APIs, APIs, User Experience (UX), Responsive Web Design (RWD), Troubleshooting, Relational Databases, Front-end Development, Web Applications
Full-stack Developer
2017 - 2017
Exceleri
- Enhanced code reliability by organizing and refactoring a significant amount of back-end code.
- Created complex workflows in React Redux, which were the application's core.
- Improved the UI/UX dramatically using themes and bundles.
- Corrected plenty of bugs in the entire application.
Technologies: Redux, React, MongoDB, Node.js, Windows, User Interface (UI), RESTFul APIs, APIs, Database Management, Responsive Web Design (RWD), Troubleshooting, Front-end Development, Multi-tenant Architecture, Web Applications
Full-stack Developer
2017 - 2017
Digital Dojo
- Played a pivotal role in orchestrating and managing the entire project, ensuring smooth coordination and successful execution.
- Designed and implemented intricate features innovatively using React/Redux, contributing to the project's growth and functionality.
- Addressed and resolved bugs proactively, demonstrating a keen eye for detail and a commitment to delivering a polished, error-free final product.
Technologies: MongoDB, Node.js, Redux, React, User Interface (UI), RESTFul APIs, Troubleshooting, Web Applications
Full-stack Developer
2017 - 2017
SimsUshare
- Initiated and developed the entire project from inception, showcasing the ability to conceptualize and execute projects from the ground up.
- Established API and Socket.IO server components, ensuring seamless communication and robust back-end functionality.
- Crafted an intuitive and responsive front end using React/Redux, enhancing the overall user experience with modern and efficient design practices.
Technologies: Express.js, Socket.IO, MongoDB, Node.js, Redux, React, User Interface (UI), RESTFul APIs, Real-time Data, WebSockets, Websites, Troubleshooting, Startups, Early-stage Startups, Web Applications
Front-end Developer
2017 - 2017
Enjoy
- Developed standalone components using React, contributing to the modular and scalable architecture of the application.
- Implemented new features within the admin platform, enhancing its capabilities and user functionality.
- Demonstrated proficiency in troubleshooting and resolving front-end bugs, ensuring a smooth and error-free user experience.
Technologies: CSS3, HTML5, Redux, React, User Interface (UI), RESTFul APIs, Websites, Troubleshooting, Web Applications
Full-stack Web Developer
2016 - 2017
Marmon
- Contributed to developing an analytics app focused on managing store shelf items, enhancing its functionality and user interface.
- Elevated the UI/UX by introducing a new theme—ensuring full responsiveness, down to 320 pixels, and providing enhanced user feedback.
- Conducted comprehensive code refactoring, incorporating linters with distinct JavaScript versions for the back and front ends, modularizing code, transitioning to Sass, and optimizing folder structure for improved organization.
- Expanded browser compatibility by adding support for older versions, ensuring a broader reach and accessibility for users.
- Integrated the application seamlessly with a data science report service, enhancing its analytical capabilities.
- Implemented a robust authentication layer, fortifying the app's security measures and ensuring a safer user experience.
Technologies: GitHub, Sass, AngularJS, Redux, React, MongoDB, Express.js, Node.js, Responsive, REST, User Interface (UI), RESTFul APIs, Websites, Troubleshooting, Relational Databases, Early-stage Startups, Web Applications
Full-stack Developer
2016 - 2016
Bloomz
- Addressed and resolved platform-wide bugs, ensuring the overall stability and reliability of the system.
- Collaborated in developing standalone React components, contributing to a more modular and maintainable codebase.
- Implemented comprehensive unit tests for the back end, enhancing code quality and facilitating a more robust and reliable system.
Technologies: Python, React, JavaScript, Jest, Unit Testing, User Interface (UI), Websites, Web Applications
Full-stack Developer
2016 - 2016
Yazabi Predictive, Inc.
- Completed assigned tasks successfully, ensuring the timely execution of outgoing deliverables.
- Enhanced the project's overall reliability and performance by systematically identifying and resolving bugs.
- Prepared the project for release, ensuring it met quality standards and was ready for deployment.
Technologies: MongoDB, HTML5, CSS3, Python, Node.js, React, Websites
Front-end Developer
2016 - 2016
Modsy
- Collaborated in developing intricate React components, contributing to the project's sophistication and functionality.
- Translated design concepts from PSD to HTML, ensuring pixel-perfect and responsive implementations.
- Enhanced overall stability and user experience by systematically addressing and resolving platform-wide bugs.
Technologies: CSS, Redux, React, JavaScript, Websites
Full-stack Web Developer
2016 - 2016
Blueshift
- Developed a soccer statistics app for a local client, showcasing proficiency in creating tailored solutions.
- Coordinated and led front- and back-end colleagues effectively—ensuring seamless collaboration and project synergy.
- Engineered the core company manager using the Kohana PHP framework, demonstrating expertise in building robust and scalable web applications.
Technologies: Subversion (SVN), MySQL, Bootstrap, Kohana, CodeIgniter, PHP, Websites, Multi-tenant Architecture
Full-stack Web Developer
2014 - 2016
Bravi
- Contributed to developing one of the world's biggest educational systems, EBS.
- Created apps for clients like Qualcomm and Tribal.
- Led the Brazilian team's technical operations for local clients.
Technologies: Docker, GitLab, Jenkins, Sass, Angular, Backbone.js, React, MongoDB, Oracle, Microsoft SQL Server, PostgreSQL, Express.js, Node.js, Websites, Multi-tenant Architecture
Full-stack Web Developer | Partner
2012 - 2014
Dauphin
- Identified prospective customers and negotiated based on the project's complexity.
- Managed contacts and sales directly with customers.
- Developed several projects for local customers and small companies.
- Designed a database using schema tools and implemented it using MySQL.
Technologies: Bootstrap, MySQL, CSS, HTML, CodeIgniter, PHP, Websites
Project History
Cabritos Groceries
http://cabritos.kreakodo.comCabritos Groceries is a mobile-first collaborative PWA that lets households and groups share grocery lists in real time. Users add items throughout the week and check them off together at the store. The app is built with Next.js 16 (App Router), React 19, and TypeScript on a Neon Postgres back end with Drizzle ORM, and authenticated via Clerk with Google OAuth.
I designed and built the entire stack: the schema (lists, items, members, invites, presence), the REST API, optimistic UI client hooks with setTimeout-based polling, an in-flight mutation guard to prevent race conditions, and a duplicate-prevention layer using normalized names and a partial unique index. Other highlights include invite-link sharing with role-based authorization (owner and guest), a 30-second presence heartbeat with online indicators, autocomplete suggestions, an installable PWA with service worker, rate limiting for public launch, and a polished emerald and slate design system tuned for one-handed in-store use.
I designed and built the entire stack: the schema (lists, items, members, invites, presence), the REST API, optimistic UI client hooks with setTimeout-based polling, an in-flight mutation guard to prevent race conditions, and a duplicate-prevention layer using normalized names and a partial unique index. Other highlights include invite-link sharing with role-based authorization (owner and guest), a 30-second presence heartbeat with online indicators, autocomplete suggestions, an installable PWA with service worker, rate limiting for public launch, and a polished emerald and slate design system tuned for one-handed in-store use.
Die Das
http://diedas.kreakodo.comDie Das is a mobile-first progressive web app that helps learners master German noun articles (der, die, das) through fast, quiz-style practice sessions. I designed and built the entire product end-to-end, from the visual identity and color system to the offline-capable PWA shell and the audio pipeline.
The app ships with 150 curated nouns, native German pronunciations generated via edge-tts (Conrad Neural voice), accuracy-tiered completion cheers, and a themed learning path with hand-crafted island worlds for each unit. State is persisted locally, so progress survives reloads and offline use. The UI supports English and Portuguese, light and dark themes, and a configurable sound volume. The project demonstrates strong attention to micro-interactions, accessibility, and a polished feel typical of native apps, while remaining a fully installable web app.
The app ships with 150 curated nouns, native German pronunciations generated via edge-tts (Conrad Neural voice), accuracy-tiered completion cheers, and a themed learning path with hand-crafted island worlds for each unit. State is persisted locally, so progress survives reloads and offline use. The UI supports English and Portuguese, light and dark themes, and a configurable sound volume. The project demonstrates strong attention to micro-interactions, accessibility, and a polished feel typical of native apps, while remaining a fully installable web app.
Seriesly
http://seriesly.kreakodo.comSeriesly is a personal TV show tracking web app that helps users follow what they watch, get reminded about upcoming episodes, and discover where to stream each title. Built as a Progressive Web App, it works on mobile and desktop, with installable offline support and native-style push notifications.
I designed and built the project end-to-end. The stack is Next.js 16 with the App Router, React 19, TypeScript, and Tailwind CSS v4. Authentication is handled by Clerk (including Google SSO), data is persisted in PostgreSQL through Drizzle ORM, and series metadata plus regional watch providers are pulled from the TMDB API, with a server-side cache that keeps results available even when upstream calls fail.
A daily Vercel Cron job signs Web Push messages with VAPID and delivers personalized release alerts to each subscriber. The codebase includes unit tests with Vitest and React Testing Library, automated patch versioning via a git hook, and a production deployment on Vercel with environment-driven configuration.
I designed and built the project end-to-end. The stack is Next.js 16 with the App Router, React 19, TypeScript, and Tailwind CSS v4. Authentication is handled by Clerk (including Google SSO), data is persisted in PostgreSQL through Drizzle ORM, and series metadata plus regional watch providers are pulled from the TMDB API, with a server-side cache that keeps results available even when upstream calls fail.
A daily Vercel Cron job signs Web Push messages with VAPID and delivers personalized release alerts to each subscriber. The codebase includes unit tests with Vitest and React Testing Library, automated patch versioning via a git hook, and a production deployment on Vercel with environment-driven configuration.
Corre AI
Corre.AI is a sports event discovery platform for Brazil that centralizes running races, triathlons, cycling, swimming, duathlon, and aquathlon competitions in a single monthly calendar. I built it end-to-end as a pnpm monorepo. The front end is a Next.js 15 App Router site with React Server Components, Tailwind CSS 4, and shadcn/ui, featuring a rich filtering experience: users can combine modality, distance ranges per leg (run, bike, swim with independent sliders), state, individual cities, and predefined regions, with URL-synced state, persistence in localStorage, and debounced server actions. The crawler is fully LLM-driven: a Mastra workflow orchestrates Playwright fetches, HTML preprocessing, OpenAI extraction into a strict Drizzle schema, structured validation, and a two-phase deduplication step that combines deterministic matching with semantic LLM comparison to merge the same event across sources with different naming. Mastra also coordinates per-source rate limiting, batch dispatch, retries with exponential backoff, and structured run logs. Storage is PostgreSQL on Neon via Drizzle ORM, with SHA-256 fingerprints for change detection. Deployment runs on Vercel.
Sword of Fury
http://swordoffury.comA hobby MMORPG that runs in the browser, with a real-time authoritative multiplayer server. I own the game design, direction and operations, and orchestrate Claude, which writes the code.
It started with one quest the players kept asking for. Then more people came, played whole nights, and the content ran out. Today it has houses, professions, mounts, wings, pets, cards, seasonal events, a day and night cycle, rain, and NPCs that talk through an LLM.
Online 24/7 since July 2026. In October, players were connected in 99.3% of minutes, with a peak of 24 at once and 112 in a single day. 230+ server deploys in four months, about two a day: players get a warning and are back in under a minute, with the world exactly as it was. 950+ accounts, 225 monthly active players, and 5,000+ hours played in October, 32% of them on mobile.
It's free, and it will stay free.
It started with one quest the players kept asking for. Then more people came, played whole nights, and the content ran out. Today it has houses, professions, mounts, wings, pets, cards, seasonal events, a day and night cycle, rain, and NPCs that talk through an LLM.
Online 24/7 since July 2026. In October, players were connected in 99.3% of minutes, with a peak of 24 at once and 112 in a single day. 230+ server deploys in four months, about two a day: players get a warning and are back in under a minute, with the world exactly as it was. 950+ accounts, 225 monthly active players, and 5,000+ hours played in October, 32% of them on mobile.
It's free, and it will stay free.
Education
2008 - 2013
Bachelor's Degree in Computer Science
Federal University of Pelotas - Pelotas, Rio Grande do Sul, Brazil
Skills
Libraries/APIs
React Redux, Node.js, React, REST APIs, Socket.IO, D3.js, Three.js, Backbone.js, MobX, API Development, Stripe API, Web Audio API, LocalStorage, Context API, React Testing Library, React Hook Form, Zod, Playwright, OpenAI API, Redux Persist, React Router, Winsock API, OpenCV, Highcharts, Google Calendar API
Tools
Claude Code, Claude, NPM, GitLab, GitHub, Expo, Jenkins, Adobe Fireworks, Subversion (SVN), Git, Canvas, Drizzle ORM, Cron, Vitest, Shadcn UI, Prettier, BigQuery, Figma, Redux Toolkit, Webpack
Languages
TypeScript, JavaScript, HTML, CSS, SQL, Python, Sass, CSS3, HTML5, C++, PHP, GraphQL, SCSS, ES5, C, C++17, Bash
Frameworks
React Native, Next.js, Redux, Express.js, AngularJS, Bootstrap, Ionic 3, Angular, Tailwind CSS, CodeIgniter, Kohana, Ionic, JSON Web Tokens (JWT), Jest, Electron, Fluent UI
Paradigms
Responsive, Responsive Web Design (RWD), Unit Testing, Agile Software Development, REST, UI Design, UX Design, Mobile Development, Search Engine Optimization (SEO), Event-driven Architecture, Refactoring
Platforms
Web, Windows, Linux, Visual Studio Code (VS Code), MacOS, Vercel, Oracle, Heroku, Docker, Shopify, Android, iOS, Mobile, Clerk, Google Cloud Platform (GCP), Firebase, Amazon Web Services (AWS), Netlify
Industry Expertise
Web Design
Storage
Relational Databases, MySQL, MongoDB, PostgreSQL, JSON, Database Management, Microsoft SQL Server, NoSQL, Google Cloud
Other
User Experience (UX), Styled-components, Full-stack, Full-stack Development, APIs, Web Development, Front-end, Algorithms, Minimum Viable Product (MVP), Technical Leadership, Front-end Development, Problem Solving, User Interface (UI), Dashboards, Data Visualization, RESTFul APIs, API Integration, Real-time Data, WebSockets, AI Agents, Medical Imaging, AI Tools, Vibe Coding, Anthropic, Agentic AI, Software Architecture, Website Design, Website Redesign, Websites, Troubleshooting, AI-assisted Development, Figma to React, Web Applications, AI Engineering, LLM Agents, Startups, OAuth, LLM Integration, Monorepos, Artificial Intelligence (AI), Charts, Audio, Data Structures, Cloud, Large Language Models (LLMs), Architecture, SaaS, Mobile App Development, AI Integration, Server-side Rendering (SSR), Multi-tenant Architecture, Early-stage Startups, Analytics, Product Development, Website Performance, Back-end, React Hooks, Machine Learning, Video Compression, Visx, Axios, Back-end Development, Tailwind UI, Progressive Web Applications (PWAs), Service Workers, Optimistic UI, Pooling Architecture, Database Schema Design, Responsive UI, Access Control, Mobile-first Design, i18n, SVG Animation, CSS Animations, Text-to-Speech (TTS), Scripting, Git Hooks, Accessibility, Single Sign-on (SSO), TMDB, Web Push Notifications, Server Components, Server Actions, ESLint, Mobile First, Mastra, Radix UI, Zustand, Web Scraping, Prompt Engineering, Provider Abstraction, Edtech Design, Griffel, IPC, contextBridge, Multithreading, Concurrency, Mutexes, Atomics, Thread Pools, TCP Sockets, Binary Protocols, RAII, Smart Pointers, Exception Handling, TIFF, PNG, AVIF, Base64, RLE, Tile-based Rendering, Image Caching, Flat-field Correction, Histogram Analysis, Pixel-level Inspection, Application State Management, Performance Optimization, Memory Management, Scientific Data Analysis, Microscopy, Life Science, DocuSign, Course Development, DNS, Team Building, Product Strategy, Supabase, Push Notifications, Training, Chatbots, Fitness
Collaboration That Works
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