Jun 2024 – Nov 2025 · 1 yr 5 mos · Remote

• Backend development (Nest.js, Prisma, GraphQL) and Quality Engineering for multinational automotive client (Toyota LATAM):
• Led security remediation reporting to C-Suite, deploying controls and coordinating with the infrastructure team to raise SecurityScorecard rating from F (57) to A (94) in one sprint.
• Owned vendor security compliance for banking client assessments, addressing identified gaps and providing evidence to achieve 98% first-pass compliance.
• Implemented proactive API monitoring (Checkly, Playwright) for client Salesforce integration, detecting undocumented breaking changes and clarifying accountability with evidence.
• Resolved pre-production API errors by adjusting error handling (e.g., correcting generic 500 responses to proper 400/401/403 codes), unblocking front-end development and improving system reliability.
• Refactored input validation architecture using Nest.js DTOs and Class Validation/Pipes, eliminating custom validation code and enhancing maintainability.
• Optimized client data extraction by designing GraphQL queries and parsing scripts, with documentation that enabled third-party teams to self-serve efficiently.
• Built k6 performance test suite for rate-limiting feature, verifying enforcement accuracy and system behavior at capacity limits.
• Automated tenant creation for new markets using AI-assisted scripting, validating and refining generated code to accelerate onboarding.

Jan 2023 – May 2024 · 1 yr 4 mos · Remote

• Backend development (Nest.js, Prisma, GraphQL) and Quality Engineering for multinational automotive client (Toyota LATAM):
• Developed automated smoke testing with alerts (Playwright/Checkly) reducing incident detection to minutes, eliminating customer-reported homepage outages for 12+ months.
• Built automated price validation tests across 85+ vehicle pages (Playwright) that caught and helped resolve critical bugs including 1-cent rounding errors, eliminating error-prone manual verification process.
• Created business rules matrix for the storage of vehicle pricing data (defect cluster), documented 14 use cases, identified critical gaps, and validated developer implementations to mitigate legal/financial risks.
• Debugged critical lead form issue in production, identifying API context reuse in shared module affecting all mailed forms; recommended immediate fix and systemic API security enhancement.
• Structured RCA procedures for production incidents with client-facing reports, identifying systemic issues and deriving JIRA tasks for fixes implemented by the development and infrastructure teams.

Feb 2020 – Dec 2022 · 2 yrs 10 mos · Remote

• Backend development for a nationwide car subscription platform for Kinto Brasil (Kinto One Personal) using Next.js (Node.js/SSR React), Lambda functions, DynamoDB, and S3 on AWS:
• Phase 1: Developed user account aggregation module consolidating data from multiple sources (OAuth, forms, third-party APIs), normalizing inconsistent formats and implementing custom error handling for non-standard external APIs.
• Phase 2: As sole backend developer, created API specifications and documentation (sequence diagrams, schemas, status codes) in advance of third-party delivery, enabling parallel development and on-time completion.
• Built internal REST APIs for frontend integration and webhook endpoint to receive third-party status updates, managing client state transitions throughout multi-step subscription workflow (account creation, document validation, approvals).
• Implemented serverless document processing: secure signed S3 uploads for vehicle checklists, automated approval Lambda based on business rules, email notification Lambda for pending client actions, and review/approval workflows.
• Wrote end-to-end tests using Cypress to validate webhook integration and client state management against external systems.
• Established CloudWatch Log Insights queries and alarms for proactive monitoring and rapid issue resolution in production environment.