Rodrigo Barreto

— Reduced a critical API endpoint from 5.5s to 200ms by profiling production traces to identify a missing index on a 500k+ row activity log, then shipping a targeted migration with zero downtime. — Run regular database index audits across the codebase, addressing missing FK indexes and unindexed deleted_at columns that compound query cost on every authenticated request. — Built a New Relic dashboard that surfaces slow queries early, with Slack alerts and tickets opened automatically so performance regressions never sit unnoticed. — Review around 3 PRs daily with a focus on query patterns, catching N+1s, expensive joins, and index-missing operations before they reach production. — Own data sync between warehouses, fixing consistency issues and keeping asset data correct as it changes across regions. — Rebuilt core frontend pages by migrating from Material UI to shadcn/ui, improving usability where it mattered most for warehouse operators. — Initiated and lead the team's monthly Tech Talks, opening with a session on database optimisation and API performance to establish a recurring forum for engineering knowledge sharing. — Contribute to product quality beyond writing code, shaping tickets with clearer acceptance criteria and proposing improvements that ship as part of the regular roadmap.

The Portuguese office was closed following FNZ Group's acquisition. Fintech platform providing wealth management solutions for financial advisers and institutions. - Led backend team of 5 engineers, code reviews, 1:1s, sprint planning, and hiring people - Increased test coverage from 25% to 80%, sharply reducing regression bugs reaching production - Mentored junior and mid-level developers - Helping the team stay focused on the right work through clear priorities and regular feedback.

- Built data aggregation system unifying FTP feeds, SOAP services, webhooks, and third-party APIs - Integrate with APIs and authentication flows (OAuth, Cognito) - Gave financial advisers a unified view of client portfolios across multiple providers - Worked with banks and insurance providers in regulated fintech environment - Ensured all integrations met compliance requirements

Digital agency building e-commerce and web applications for enterprise clients. - Built backend for AkzoNobel's multi-region e-commerce platform - Supported 3 currencies and multiple European markets using Rails + Spree Commerce - Integrated Stripe payments

Large-scale Dutch recruitment platform with 100+ engineer department. - Built an intelligent job search with Elasticsearch (synonym detection, category fallback, context awareness) on a platform serving a large Dutch candidate base. - Created a recruitment CRM (Rails, React, MySQL) that improved candidate placement rates. - Core contributor to payroll/HR systems processing thousands of employees, including contracts, commissions, and AFAS sync. - Helped break a Rails monolith into microservices and built BFF layers exposing APIs to other teams. - Conducted technical interviews for new hires across a 100+ engineer department.

Company acquired by Placewise (formerly Boostcom) in January 2018. - Developed backend systems for shopping centre digital platforms - Built APIs for multi-tenant retail applications

Simdut - PUC-RJ Started as an intern while finishing my degree at a thermo-hydraulic simulation lab that worked with Brazil's biggest oil & gas pipelines. Built internal tools and systems for clients like Petrobras and Transpetro. Went from intern to mid-level in 2.5 years, learned a lot about .NET, SQL Server, and what it means to work on software that actually matters.

Object-oriented programming, database design (SQL/NoSQL), full stack development, software architecture and design patterns (SOLID, GRASP, GoF), microservices with Docker and cloud deployment, DevOps and CI/CD, agile project and product management (Scrum, Kanban, SAFe), requirements engineering, UI design and prototyping, software testing and quality (TDD, CMMI, MPS.BR), secure development (OWASP), and intelligent systems with machine learning. Project-driven curriculum with hands-on MVPs each sprint.