Guilherme Dietrich

Guilherme Dietrich

About

Detail

AI-Focused Software Engineer | 10+ YoE | Full stack | Building AI-Powered Applications with LLMs, RAG & Claude | C# | .NET | TypeScript
São Paulo, State of São Paulo, Brazil
Contact Guilherme regarding: 
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Full-time jobs
Starting at USD60/hour
Flexible work
Starting at USD60/hour
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Résumé

Jobs verified_user 0% verified
  • E
    Founder - Brazilian Job Portal | Solo Developer + AI
    Emprego Ideal
    Feb 2026 - Current (4 months)
    https://empregoideal.com.br/ Creator and full-stack developer of Portal Emprego Ideal (empregoideal.com.br), a Brazilian job platform connecting candidates and companies through intelligent matching — free for job seekers, empowering recruiters with smart tools. Built end-to-end using Claude Code (Anthropic) as an AI engineering copilot, from architecture design to production deployment, proving how AI-assisted development delivers high-quality software at scale. Key achievements: • Architected 6 microservices + API Gateway using C# / ASP.NET Core 8 with CQRS (MediatR), Clean Architecture, and SOLID principles; • Built a responsive Angular 19 frontend with 87 components, 59 services, Bootstrap 5, and dark/light theme support; •
  • Kopius
    Full Stack Engineer allocated at HCHB.
    Kopius
    Sep 2024 - Feb 2026 (1 year 6 months)
  • Homecare Homebase
    Full Stack Engineer
    Homecare Homebase
    Sep 2024 - Feb 2026 (1 year 6 months)
    • Implemented new features that improved the efficiency of the software platform, resulting in a 25% reduction in response times for client interactions using C# and .NET. • Developed RESTful APIs that enhanced data retrieval processes, achieving a 30% increase in application performance through optimized query handling with ASP.NET Core and Entity Framework. • Designed a responsive front-end architecture using Angular and TypeScript, which contributed to a 20% improvement in user satisfaction scores based on client feedback. • Collaborated in an Agile environment, leveraging SCRUM methodologies to facilitate effective team communication and streamline feature delivery. • Utilized Azure DevOps for establishing CI/CD pipelines, enhancing
  • B
    Full Stack Engineer
    B
    Apr 2023 - Sep 2024 (1 year 6 months)
    • Introduced custom stateless Angular components that resulted in an 80% reduction in development time for new web forms, improving team efficiency. • Migrated a desktop application to a web environment, enabling a 30% decrease in page load times using C# and .NET. • Implemented automated testing solutions that increased test coverage by 50%, ensuring application stability during updates. • Worked with C#, .NET Framework, and ASP.NET to develop robust APIs that improved communication between the front-end and back-end. • Utilized Angular and Bootstrap to create responsive and intuitive user interfaces, enhancing the end-user experience. • Collaborated in an agile development environment, applying SCRUM for task management and resource
  • GFT Technologies
    Full Stack Senior Software Engineer allocated at B3
    GFT Technologies
    Apr 2023 - Sep 2024 (1 year 6 months)
  • Avivatec
    Full Stack Engineer
    Avivatec
    Jul 2022 - Mar 2023 (9 months)
    • Maintained and delivered new features across a distributed client system using C#, .NET, SQL Server, Dapper, Entity Framework, Angular, and Bootstrap, ensuring high reliability and performance. • Worked with microservices architecture to troubleshoot and implement features in a complex distributed environment, improving system resilience. • Drove a knowledge-sharing initiative within the squad that resulted in a 20% increase in overall development speed, fostering a collaborative and growth-oriented team culture. • Served as one of a select group authorized to manually manage Docker images and server environments, streamlining collaboration between development and QA teams to validate bug fixes efficiently.
  • VERION Oleohidraulica BRASIL
    Full Stack Engineer
    VERION Oleohidraulica BRASIL
    Dec 2020 - May 2022 (1 year 6 months)
    • Maintained and developed a custom library of stateless components using C# and Angular, reducing the time required to build complex screens from 4 days to just 4 hours. • Promoted to Xamarin Front-End Team Manager after 7 months, taking ownership of planning and executing the integration between MVVM and domain models for screen binding. • Delegated tasks and provided technical guidance to junior and mid-level developers, ensuring alignment with project goals and coding standards. • Conducted code reviews for the team and supported senior developers across other squads, enforcing adherence to coding patterns and best practices. • Contributed to backend development using DDD, SOLID, CQRS, and Event Sourcing with C# and .NET, participat
  • Pasquali Solution
    Full Stack Senior Software Engineer allocated at VERION
    Pasquali Solution
    Dec 2020 - Jul 2021 (8 months)
  • Parametriza
    Full Stack Engineer
    Parametriza
    Jan 2020 - Feb 2021 (1 year 2 months)
    • Designed and developed a full CRM system from scratch using C#, .NET Core, Angular, Bootstrap, REST APIs, and SQL Server, enabling company dealers to manage financial and licensing aspects of their clients. • Integrated the CRM with a payment gateway, implementing request, response, and webhook handling that made customer billing 100% automated. • Maintained and delivered new features in the CRM platform based on product owner requirements, ensuring continuous improvement and alignment with business needs.
  • G
    Full Stack Engineer
    Gsoft do Brasil Sistemas
    Jan 2015 - Jun 2018 (3 years 6 months)
    • Maintained and delivered new features in the company's ERP software built with Delphi and SQL Server, ensuring system stability and continuous improvement. • Participated in the migration of a 10+ year-old system from Delphi 7 to Delphi Rio, resulting in a 40% improvement in bug identification efficiency and a 20% increase in development speed. • Designed and developed a customizable ETL solution in Delphi Rio to transfer client data between ERP systems, eliminating manual data entry steps and delivering immediate value to end users. • Conceptualized, designed, and developed an Android sales force app using C#, .NET, Xamarin Forms, and SQLite, supporting both online and offline modes and integrating directly with the ERP system, contri
  • Dicon Contabilidade
    Full Stack Engineer
    Dicon Contabilidade
    Oct 2013 - Oct 2014 (1 year 1 month)
    • Developed an integration between the CRM database and Microsoft Word using C#, reducing a monthly task that previously required two people and two days to just two minutes. • Built a company intranet with a forum using C#, ASP.NET, ADO.NET, Entity Framework, MVC, and MySQL, significantly improving internal communication for more than 60 employees. • Developed an internal expedition system using C#, Windows Forms, Entity Framework, MySQL, and Word integration for document printing, reducing time spent on manual sheet filling by 80%. • Designed and implemented an internal call stack solicitation feature for telephonists, integrated with the company intranet, completely eliminating the problem of missed or forgotten requests — a 100% impr
  • M
    Help Desk Technician
    Microsistec
    Oct 2010 - Jan 2011 (4 months)
    • Provided client support via online chat and phone, troubleshooting issues related to the company's software and ensuring a positive customer experience. • Identified, documented, and reported bugs by generating detailed tickets for the development team, improving issue tracking and resolution efficiency. • Conducted training sessions for new users, equipping them with the knowledge to efficiently navigate and use the system.
Education verified_user 0% verified
  • ETEC Escola Técnica Estadual de São Paulo
    Technical course, Computer Software Engineering
    ETEC Escola Técnica Estadual de São Paulo
    Jun 2011 - Dec 2012 (1 year 7 months)
Projects (professional or personal) verified_user 0% verified
  • I
    Portal Emprego Ideal — Brazilian Job Platform
    Ideal Soluções
    Jan 2026 - Current (5 months)
    Portal Emprego Ideal — Brazilian Job Platform (empregoideal.com.br) Full-stack job platform built from scratch to democratize hiring in Brazil: 100% free for candidates, with affordable recruiter tools for SMBs. Designed, developed, and deployed entirely with Claude Code (Anthropic) as an AI pair-programming copilot. What makes it unique: ► Intelligent 7-criteria matching engine — Ranks candidates by location, experience, education, skills, salary, languages, and licenses. Weighted scoring with Redis caching delivers sub-second results across thousands of profiles. ► Complete hiring lifecycle — Companies post jobs, receive ranked applicants, manage pipelines, and process payments (PIX, credit card, boleto) via Asaas with recurring subscript
  • Verion agricultura
    Custom Components in Xamarin.Forms
    Verion agricultura
    Dec 2020 - May 2022 (1 year 6 months)
    - I was responsible for conceptualizing, building, and testing a custom library of complex components developed with Xamarin, C#, and .NET. These components are stateless and receive their references, command implementations, and behaviors through data binding. - The introduction of these components has significantly reduced the development time for new complex screens from 4 days to just 4 hours. Hard Skills: - C# | Xamarin.Forms | .NET - OOP | IoC - MVC | MVVM - Components Library
  • D
    Data Processing, Tax Analysis and Retrieval
    Apr 2020 - Jul 2020 (4 months)
    - I was part of a specialized team consisting of tax experts, engineers, tax lawyers, and DevOps professionals. Our team was responsible for data processing and analysis for large companies, working with over 4 petabytes of text data. This data needed to be extracted, transformed, pre-processed, and normalized before being loaded into a PostgreSQL database. - Once in the PostgreSQL database, my implementation, built with C# and .NET Core running on Linux, handled the connection pool with the database and executed queries to retrieve the required data for generating the final analytical reports, following the patterns provided by the Brazilian government. - This project was one of the most challenging endeavors of my career. It involved deal
  • G
    Mobile Sales Force App
    Gsoft
    Jan 2015 - Jun 2018 (3 years 6 months)
    - I was responsible for conceptualizing, developing, testing, and deploying a new product within an ERP software company. The goal of this product was to increase the company's invoice by more than 10%. - The Mobile Sales Force App was designed to seamlessly integrate with the company's ERP product. It was developed using Xamarin Forms, C#, .NET, .NET Core, SQLite, MongoDB, SQL, and NoSQL. The app was specifically tailored to work on Android devices, both online and offline. When the device has an internet connection, the app automatically synchronizes with the ERP database. Hard skills: - C# | Xamarin | Web API | API | JSON | REST - .NET | .NET Core - SQL | NoSQL | SQL Server | SQLite | MongoDB - ERP Integration
  • Dicon Contabilidade
    Expedition System Integrated with Intranet
    Dicon Contabilidade
    Oct 2013 - Oct 2024 (11 years 1 month)
    - This software is responsible for managing the routine of an expedition department in a large accounting office. The system was developed using Windows Forms, C#, and MySQL. - To constantly improve efficiency, the system has been integrated with Microsoft Word. It utilizes a template paper sheet that is automatically filled with data, requiring only a pen signature. - The document flow is bidirectional, from the office to the client and vice versa. When the office needs to dispatch documents, the integration with the intranet is achieved using C#, ASP.NET, HTML, JavaScript, CSS, MySQL, and ADO.NET. This integrated expedition system reduces the time spent on manual sheet filling by 80%. Hard Skills: - C# | Windows Forms - ASP.NET | HTML | C