Open to opportunities

Guilherme Henrique Persuhn Sanches

@guilhermehenriqueper

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Frontend Engineer specializing in React, TypeScript, and React Native for scalable products.

Brazil

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What I'm looking for

I’m looking to contribute to cross-functional product teams building intuitive, high-quality user-facing experiences at scale—bringing strong frontend performance habits, automation with n8n, and disciplined decision-making to deliver real user impact.

I’m a Frontend Engineer with 3+ years building production web and mobile apps, specializing in React, TypeScript, and React Native. I deliver end-to-end features—from prototyping CRM dashboards and booking flows to integrating AI-powered automations and no-code workflows with n8n. I’m known for performance optimization and reliability, using state-management best practices and code-splitting to ship faster load times.

Across freelance and engineering roles, I own architecture, component patterns, and code quality across concurrent projects, following a “you build it, you run it” mindset. My analytical background from independent trading sharpens how I handle uncertainty and risk, translating into disciplined decision-making and real user impact in every product I touch. I want to join cross-functional teams building intuitive, high-quality user-facing experiences at scale.

Experience

Work history, roles, and key accomplishments

Current

Integration Developer

Current

Instituto ESPE

Feb 2026 - Present (5 months)

Architected and implemented system integrations connecting internal platforms with third-party services, reducing manual data-entry overhead for administrative teams. Built n8n automation workflows and API-driven pipelines to replace hours of repetitive manual processes while maintaining production reliability.

N8n System Integration Workflows REST APIs Production Support Data Pipelines Reliability Engineering

Current

Independent Professional Trader

Current

Independent Professional Trader

Apr 2024 - Present (2 years 3 months)

Operated as a day trader across Brazilian (B3) and U.S. markets using technical analysis, price action, and index futures. Applied rigorous risk management and data-driven decision-making to improve disciplined execution under uncertainty.

Technical analysis Market Action Risk Management Data Driven Decision Making

Software Engineer

Autonomous

Nov 2024 - Jan 2026 (1 year 2 months)

Designed and delivered modern web applications using React, TypeScript, Tailwind CSS, and Node.js across architecture to deployment. Integrated AI agents and automated workflows with n8n and custom APIs, and applied state management plus code-splitting to measurably improve load times.

React TypeScript Tailwind N8n AI Agents REST APIs State Management

Front-End Developer

NX Multiservices

Apr 2024 - Nov 2024 (7 months)

Engineered React and Flutter interfaces for client-facing web and mobile applications, translating design specifications into responsive, pixel-perfect experiences. Developed and maintained no-code solutions to accelerate delivery, and refactored existing projects to improve readability, performance, and maintainability.

React Flutter Responsive UI Refactoring Performance Optimization Cross Functional Collaboration

Development and Customer Support Intern

SOLUS Health

Jan 2024 - Apr 2024 (3 months)

Developed internal solutions using Delphi and SQL, delivering feature improvements and bug fixes that enhanced healthcare system reliability. Provided customer relations and technical problem-solving to quickly resolve production issues while working with senior engineers on requirements and documentation.

Delphi SQL Customer Support Technical Troubleshooting Requirements Analysis Reliability Documentation

PHP Development Intern

Bis2Bis

Sep 2023 - Dec 2023 (3 months)

Delivered PHP-based e-commerce features using an Agile Scrum process with daily stand-ups, contributing to on-time sprint completion. Worked on API integration to connect storefront and backend services, improving checkout and product discovery flows.

PHP Agile Scrum API Integration Production Ready Code Checkout Optimization Product Discovery

PHP Development and Support Intern

IMOBASE

Aug 2022 - Sep 2023 (1 year 1 month)

Built PHP solutions and client-facing websites, delivering functional web products that met diverse business requirements. Maintained and enhanced a CRM platform deployed across multiple client companies and provided customer support and technical troubleshooting to ensure system stability.

PHP System Stability Technical Troubleshooting Customer Support