Carlos – Typescript, React, Node.js

One of the largest beauty companies in Latin America, with over 14 million clients. On the technology side, is also one of the largest AWS customers in Latin America, operating at significant scale in the cloud.

• Provisioned 50+ AWS services (SQS, SNS, Lambda, S3, API Gateway, and more) across sa-east-1 to us-east-1 for global scalability.
• Migrated Node.js Lambdas from version 16 to 22, enhancing performance, security, and long-term maintainability.
• Created migration services to restructure user location management with optimized queries and superior architecture.
• Designed and implemented a DDoS mitigation solution that recovered approximately $200K in AWS losses.
• Built an EventBridge service to process location events from 14M+ clients in real-time.

A cryptocurrency user-friendly platform for buying, selling, and managing digital assets like Bitcoin and Ethereum. Tailored for beginners and pros, it features secure wallet integration, intuitive UI, simplified fiat onboarding, and local currency support.

• Migrated legacy codebase to a modern architecture, eliminating technical debt and enabling faster feature development.
• Refactored SQL queries for 5x performance gains, reducing latency and handling higher trading volumes efficiently.
• Optimized CI/CD pipelines to cut deployment times by 40% while boosting reliability and uptime.
• Migrated UI to a new design standard, improving user experience and conversion rates for global traders.

A secure, self-hosted open-source platform for real-time messaging, voice/video calls, file sharing, and external integrations. It supports multi-channel communication, server federation, and enterprise-scale performance for organizations needing full data control, customization, and compliance (e.g., enterprises, governments).

• Integrated Google authentication to streamline secure user onboarding and SSO.
• Built Matrix server integration for seamless federation and cross-platform interoperability.
• Migrated legacy code to modern standards, reducing maintenance overhead and enhancing extensibility.
• Refactored JavaScript codebase to TypeScript, improving type safety, developer productivity, and runtime reliability.
• Collaborated with the platform team to deliver holistic improvements across the platform application.

Led architecture for a from-scratch payment gateway that migrated all company payments from Vindi (saving >$500K/month). Delivered PCI-compliant, multi-tenant platform with full data isolation, sync/async integrations, and Kafka-based event-driven communication — ready for external clients.

• Key contributor building payment gateway from scratch, slashing costs by replacing Vindi's $500K+/month fees.
• Designed secure, scalable multi-tenant architecture with full PCI compliance for external client deployment.
• Defined sync/async integration patterns and Kafka event-driven strategy for robust performance.
• Collaborated cross-functionally with product, security, and infra teams for a production-ready solution.

A software platform paired with a mobile app that helps small stores expand their reach — enabling geo-targeted discount coupons on maps, customer notifications, and in-store redemptions.

• Designed and built complete full-stack backend and frontend from scratch.
• Integrated Google Geolocation and Maps for precise location-based targeting.
• Validated all flows with comprehensive unit tests for reliability.
• Added Sentry monitoring with email notifications for proactive issue resolution.