Portfolio

Projects & Impact

A curated selection of projects where I led architecture decisions and delivered measurable business impact.

BackendFintechArchitecture

Payment Gateway Integrations — Mercado Pago

Context: Mercado Pago processes millions of transactions daily across Latin America. The payment gateway integration layer needed to be highly reliable, scalable, and support multiple payment providers with low latency.
Solution: Developing and maintaining 42+ Golang microservices that integrate with external providers and acquirers, translating credit card transaction messaging into formats accepted by each provider — JSON, XML, ISO 8583, and positional TXT batch files via SFTP. Implementing observability with Datadog, New Relic, and BigQuery for real-time monitoring and analytics.
Impact

Processing millions of daily transactions across Latin America with high availability. Leading technical projects and architecture decisions for Mercado Pago's payment gateway infrastructure.

GolangGinAWSKubernetesDockerRedisDynamoDBDatadogNew RelicBigQueryNginx
FintechBackendArchitecture

Vehicle Financing Credit Platform — OMNI

Context: OMNI Banco & Financeira needed a robust credit analysis and loan processing system for vehicle financing, requiring complex business rules, risk assessment, and regulatory compliance.
Solution: Led the engineering team to build and evolve the vehicle financing credit platform using Java and Kotlin with Spring Boot. Drove architectural decisions for credit analysis workflows, loan processing pipelines, and integration with credit bureaus.
Impact

Delivered a reliable credit platform that streamlined vehicle financing operations. Established technical standards and mentored the development team.

JavaKotlinSpring BootAWSPostgreSQLDockerKubernetes
FintechBackend

AML/PLD Compliance System — C6 Bank

Context: C6 Bank, one of Brazil's fastest-growing digital banks, required robust Anti-Money Laundering (AML/PLD) systems to meet regulatory requirements and monitor suspicious financial activities.
Solution: Developed backend services for transaction monitoring, suspicious activity detection, and regulatory reporting using Kotlin and Spring Boot. Built compliance workflows that automated detection and reporting processes.
Impact

Strengthened C6 Bank's regulatory compliance posture with automated AML monitoring, reducing manual review workload and improving detection accuracy.

KotlinJavaSpring BootPostgreSQLAWSDocker
BackendArchitecture

Anti-Fraud Detection System — Mapfre Seguros

Context: Mapfre, a major insurance company, needed to detect and prevent fraudulent claims across multiple insurance products, requiring integration with diverse data sources and pattern recognition.
Solution: Built Java-based backend services for claims analysis and fraud prevention at IBM. Integrated multiple data sources for fraud pattern recognition and developed automated detection workflows.
Impact

Improved fraud detection capabilities for Mapfre's insurance operations, reducing fraudulent claims processing and strengthening the anti-fraud pipeline.

JavaSpring BootOracle SQLJenkinsDocker
ArchitectureOpen Source

Spring Boot Kotlin — DDD & Hexagonal Architecture

Context: Demonstrating clean architecture principles with a practical implementation of Domain-Driven Design and Hexagonal Architecture using modern JVM technologies.
Solution: Built a reference implementation showcasing DDD and Hexagonal Architecture patterns with Spring Boot and Kotlin, including proper separation of concerns, port/adapter pattern, and testable domain logic.
Impact

Open-source reference project for developers learning clean architecture patterns with Kotlin and Spring Boot.

KotlinSpring BootDDDHexagonal Architecture
BackendOpen Source

Go Expert — Advanced Golang Studies

Context: Deep-diving into advanced Golang concepts including concurrency patterns, web frameworks, gRPC, GraphQL, and cloud-native development through the FullCycle Go Expert course.
Solution: Repository with implementations covering advanced Go topics: multithreading, channels, context, clean architecture, DI, gRPC, GraphQL, and more. Practical exercises demonstrating production-ready Go patterns.
Impact

Comprehensive learning repository with 117+ repos on GitHub, demonstrating continuous learning and deep expertise in Go ecosystem.

GolanggRPCGraphQLDockerClean Architecture
Open Source

Lordicon Preview — VS Code Extension

Context: Developers using Lord Icons in their projects needed a quick way to preview icons directly in VS Code without leaving the editor.
Solution: Built a Visual Studio Code extension that provides instant preview of Lord Icons by detecting icon IDs in code. Supports JavaScript, TypeScript, HTML, JSX, and TSX files with automatic detection.
Impact

Published open-source VS Code extension improving developer experience for Lord Icons users.

TypeScriptVS Code APINode.js
Open Source

Docker Compose Database Templates

Context: Developers frequently need to spin up database instances for local development but setting up Docker Compose files from scratch is repetitive and error-prone.
Solution: Created a collection of ready-to-use Docker Compose templates for common databases (PostgreSQL, MySQL, MongoDB, Redis, etc.) with sensible defaults and documentation.
Impact

4+ stars on GitHub. Used by developers to quickly bootstrap local database environments for development and testing.

DockerDocker ComposePostgreSQLMySQLMongoDBRedis
MobileOpen Source

EBI — Espaço Bíblico Infantil

Context: Children's Bible Space coordinators needed a simple, free, and offline tool to register attendance, manage children's data, and generate reports for their congregations.
Solution: Built a mobile app with offline-first architecture for attendance registration with one-tap check-in, children management with guardians and birth dates, daily reports, attendance evolution, birthday lists, absent children tracking, visitor control, and multi-collaborator support.
Impact

100% offline mobile app serving congregations with attendance tracking, collaborative usage, and complete privacy — no data collection, no tracking, no ads.

FlutterDartSQLiteOffline-First
MobileOpen Source

CCBScan — Document Scanner

Context: Church department coordinators needed a simple way to digitize and organize documents by department, year, and month — without relying on internet connectivity or cloud services.
Solution: Built a mobile document scanner with intelligent edge detection, perspective correction, image filters (original, document, grayscale, high contrast), automatic folder organization by department/year/month, PDF generation with custom covers, gallery import, and easy sharing via WhatsApp or email.
Impact

Fully offline document scanner with professional PDF output, automatic organization, and zero data collection — built voluntarily for the community.

FlutterDartOpenCVPDF GenerationOffline-First
ERP / SaaSBackend

Portal do Voluntário — Volunteer Management Platform

Context: Third-sector organizations needed a platform to digitize and centralize volunteer management, task tracking, inventory control, and administrative reporting across multiple sectors and regions.
Solution: Built a full-stack web platform featuring Kanban task boards, inventory control, qualitative reports, user management (SIGA), spreadsheet import for bulk hour registration with automatic validation, intelligent reports by sector/region/activity, and role-based access control (admin, manager, volunteer).
Impact

Optimized report closing time and standardized processes at sector level. Serving as volunteer Tech Coordinator and Lead Developer for the project.

JavaSpring BootAngularPostgreSQLDocker
ERP / SaaSBackend

MyFyn — Financial Management SaaS

Context: Small businesses and individuals needed an accessible financial management tool to track income, expenses, cash flow, and generate financial reports without complex ERP systems.
Solution: Full-stack SaaS platform built with Golang on the backend and Angular on the frontend. Implemented complex business rules for cash flow control and financial planning, with intuitive dashboards, transaction categorization, and multi-user support. Structured cloud environment and CI/CD pipeline.
Impact

SaaS platform providing accessible financial management for individuals and SMBs with clean UX, data intelligence, and automated reporting.

GolangAngularPostgreSQLDockerCI/CDCloud