Core backend engineer for a multi-tenant SaaS platform (salon booking + e-commerce). Responsible for architecture decisions, system design, and end-to-end implementation of critical business systems.

• Architected and built 10 independently deployable services in Go — public API, admin API, async workers, and webhook processors — following clean architecture with dependency injection and interface-driven design
• Designed an event-driven order processing pipeline (BigCommerce webhooks → SQS → Lambda), resolving concurrency issues that caused data inconsistencies under high webhook throughput by decoupling ingestion from processing
• Implemented multi-layer caching with Valkey using cache-aside pattern, single-flight for thundering herd prevention, and configurable TTL policies — fixing frontend memory leaks caused by heavy uncached database queries
• Built a role-based access control system with Casbin — fine-grained path-based authorization supporting 5 roles across multi-tenant contexts with wildcard matching
• Integrated 5 external systems end-to-end: BigCommerce (e-commerce), Exact Online (ERP/invoicing with OAuth token management), Clerk (auth), Postmark (transactional emails in 3 languages), and SerpAPI (reviews)
• Designed the database schema across 76 migrations including PostGIS for geospatial search, multi-language translations, soft deletes, and composite indexes for query performance
• Owned CI/CD pipeline: GitHub Actions with matrix builds, Docker multi-stage builds, ECR push, ECS Fargate deployment — using AWS OIDC (no long-lived credentials)
• Built async activity logging: SQS → Lambda batch processor → DynamoDB with composite keys for efficient time-range audit queries

Contracted as backend engineer for Gol Airlines — one of Brazil's largest carriers — building an internal employee travel management system from the ground up.

• Designed and implemented a fully serverless architecture: Auth0 for authentication, DynamoDB for persistence, Lambda for compute, EventBridge for event routing, and SNS for push notifications on flight scheduling
• Built an AWS IAM-inspired permission system allowing admins to assign fine-grained feature-level access per user — similar to IAM policies with resource-based permissions
• Integrated with GDS (Global Distribution System) for real-time hotel and flight data retrieval
• Served as technical reference for the project — created architecture design documents and led system design decisions
• Automated employee onboarding via a Python Slack bot with 1Password integration — the only engineer to successfully implement the 1Password API integration, reducing onboarding time by 40%

Built custom Learning Management Systems for enterprise clients at a company recognized by Fast Company for innovation in online video.

• Developed and maintained REST APIs with TypeScript/Node.js, focusing on SQL query optimization and efficient database management with PostgreSQL
• Built interactive frontend interfaces with React.js, contributing to user experience improvements across multi-tenant LMS platforms
• Applied SOLID principles and clean code practices to ensure modularity and testability with comprehensive Jest testing
• Integrated AWS IAM for secure multi-tenant authentication and access control

Early-career role in a small innovation team (2 developers) at a global technology leader, building internal products before the team scaled through acquisition.

• Built and maintained Client Portal and Ally Portal (affiliate/reseller management) — taking ownership of features end-to-end despite limited team size
• Developed backend systems following SOLID principles, clean architecture, and design patterns with comprehensive Jest testing
• Built frontend features and implemented APIs to automate internal processes