Gustavo Chahm Francelino

Senior Software Engineer passionate about building scalable systems and intelligent applications. From architecting enterprise monorepos to experimenting with AI-driven games, I love turning complex ideas into elegant, production-ready solutions. My work bridges frontend craftsmanship, backend reliability, and cloud automation — always with a focus on clarity, performance, and human impact.

  • present2025 Jul

    Senior Software Engineer - Elios

    Built key frontend and backend parts of a multi-tenant SaaS platform, including an OpenAPI client generator adopted by 30+ developers. Designed backend patterns with MediatR/CQRS, implemented SSO with Keycloak, improved CI/CD pipelines, and enabled consistent development across multiple teams.

    • React
    • TypeScript
    • C#
    • .NET 9
    • PostgreSQL
    • AWS
    • Azure DevOps
  • 2025 Jul2021 May

    Software Engineer 2 - Microsoft

    Delivered end-to-end solutions across multiple Microsoft products, from API design to production deployment. Led major features like eSignature integration in Word and SharePoint, rearchitecting legacy flows into event-driven systems. Focused on performance, reliability, and mentoring teams in modern .NET and React practices.

    • .NET 8
    • React
    • Azure
    • C#
    • JavaScript
    • TypeScript
    • SQL
  • 2021 Mar2017 Sep

    Software Developer - Advance Systems

    Built enterprise .NET and Angular applications used by thousands of clients. Improved system performance, introduced automation that cut payroll processing time by 89%, and developed secure APIs and BI tools for workforce management. Played a key role in improving code quality and long-term maintainability.

    • Angular
    • React
    • .NET Core
    • SQL
    • C#
  • 2017 Sep2016 Feb

    Application Support Analyst - Advance Systems

    Provided technical support to a client base of over 40,000 users, optimizing workflows through process documentation and automation. Gained deep insight into system operations, which later shaped my software engineering approach toward reliability and user-centric design.

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    • Social media app

      A production-ready, cloud-native social media platform showcasing enterprise-grade AWS architecture. Built with serverless technologies advanced single-table NoSQL design, and comprehensive observability.

      • DynamoDB
      • AWS Lambda
      • S3
      • Cognito
      • React
      • NodeJS
      • CI / CD
      github [#142]Created with Sketch.

    • AI-Powered Dungeon Game

      An interactive dungeon adventure where AI agents generate dynamic storylines and manage game state using the Model Context Protocol (MCP).

      • Agents
      • MCP
      • AWS Bedrock
      • React
      • TypeScript
      • tRPC
      • Python
      • AWS CDK
      • DynamoDB
      github [#142]Created with Sketch.

    • AI Interactive CV

      A conversational resume powered by OpenAI’s function calling, capable of answering questions about my career and projects. It autonomously captures visitor insights and sends real-time notifications for unanswered queries. Deployed on Hugging Face Spaces as a creative, AI-driven alternative to traditional resumes.

      • Agents
      • Hugging Face
      • Gradio
      • Next.Js
      github [#142]Created with Sketch.

    • Kalendario

      A booking and scheduling platform built for small businesses to manage appointments and team availability. Adopted by local salons in production, it features real-time updates, role-based access, and a modern React + Django REST architecture. Deployed on Microsoft Azure with PostgreSQL backend.

      • Django
      • React
      • Python
      • AWS
      • PostgreSQL
      github [#142]Created with Sketch.