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Senior Software Engineer with 12+ years of experience designing and scaling production systems in Node.js, TypeScript, and MongoDB—from legacy refactors and performance work to services built from scratch. Full-stack across React, React Native, Vue, and Flutter. Track record includes cutting critical API response times from up to 14 minutes to ~3 minutes on a production platform, and reducing a monthly field-data and Excel-based calculation cycle from 30 days to one week at a state-adopted research lab.…Senior Software Engineer with 12+ years of experience designing and scaling production systems in Node.js, TypeScript, and MongoDB—from legacy refactors and performance work to services built from scratch. Full-stack across React, React Native, Vue, and Flutter. Track record includes cutting critical API response times from up to 14 minutes to ~3 minutes on a production platform, and reducing a monthly field-data and Excel-based calculation cycle from 30 days to one week at a state-adopted research lab.

Osvaldo Junior

Software Engineer, Back-End Developer, Full Stack Developer, +2

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Senior Software Engineer with 12+ years of experience designing and scaling production systems in Node.js, TypeScript, and MongoDB—from legacy refactors and performance work to services built from scratch. Full-stack across React, React Native, Vue, and Flutter. Track record includes cutting critical API response times from up to 14 minutes to ~3 minutes on a production platform, and reducing a monthly field-data and Excel-based calculation cycle from 30 days to one week at a state-adopted research lab.…Senior Software Engineer with 12+ years of experience designing and scaling production systems in Node.js, TypeScript, and MongoDB—from legacy refactors and performance work to services built from scratch. Full-stack across React, React Native, Vue, and Flutter. Track record includes cutting critical API response times from up to 14 minutes to ~3 minutes on a production platform, and reducing a monthly field-data and Excel-based calculation cycle from 30 days to one week at a state-adopted research lab.

Available to hire

Senior Software Engineer with 12+ years of experience designing and scaling production systems in Node.js, TypeScript, and MongoDB—from legacy refactors and performance work to services built from scratch. Full-stack across React, React Native, Vue, and Flutter.

Track record includes cutting critical API response times from up to 14 minutes to ~3 minutes on a production platform, and reducing a monthly field-data and Excel-based calculation cycle from 30 days to one week at a state-adopted research lab.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Portuguese

Fluent

English

Advanced

Work Experience

Senior Software Engineer at Brisance (Contracted to Re/Max)

February 1, 2022 - Present

Refactored legacy Node.js functions and rewrote MongoDB queries using aggregation pipelines, cutting critical API response times from up to 14 minutes to ~3 minutes. Used Datadog to pinpoint bottlenecks that were crashing pods. Architected and built a standalone document-conversion microservice with Node.js/TypeScript/Express, LibreOffice, and Docker, standardizing platform files to PDF. Implemented real-time loan officer synchronization with Socket.io to eliminate stale-data errors across multiple tabs. Centralized front-end state with Vuex to fix divergent mortgage values and reduce calculation latency by rewriting MongoDB queries. Built document page organization/rotation/annotation/reordering and version history directly into the platform to eliminate download–edit–reupload workflows. Defined AI-assisted development standards for the team using Cursor to keep LLM-generated code aligned and reviewable before merge. Reduced licensing costs by automating removal of document securi

Senior Software Engineer at Alice Brazil

September 1, 2021 - February 1, 2022

Reduced in-person measurement visits by 90% in the São Paulo region by integrating medical devices with a Flutter mobile app over Bluetooth and streaming readings directly to care teams. Built an automated patient triage system that became the primary intake channel for patients, reducing repetitive intake work for nursing staff. Developed platform usage reports for clinical and operational decision-making, leveraging Vue.js, Kafka, MongoDB, and PDF generation.

Senior Software Engineer at Cuidas Brazil

February 1, 2021 - September 1, 2021

Shipped the company's benefits network from zero, enabling employees to access discounts at partner pharmacies, gas stations, and merchants; built end-to-end using Node.js, TypeScript, MongoDB, React, React Native, and Apollo GraphQL under Domain-Driven Design and Clean Architecture. Improved Google Calendar integration by reconciling personal and professional schedules, surfacing conflicts in the React UI and enabling staff to force appointments when needed. Strengthened unit and integration test coverage with Jest and implemented Jenkins CI to improve per-task deployment and reduce merge conflicts. Enhanced mobile UI accessibility with better controls to reduce support requests related to workflow confusion.

Tech Lead / Senior Software Engineer at LabTIC/UDESC (Laboratório de Tecnologias de Informação e Comunicação)

June 1, 2015 - January 1, 2021

Led development efforts and delivered systems adopted by state-level stakeholders, including replacing manual field collection and Excel-based calculations with a purpose-built system that reduced the monthly cost-of-living/regional-inflation cycle for Greater Florianópolis from 30 days to one week. Extended the index using configurable consumption baskets and built an offline research mobile app with SQLite, barcode/QR scanning, and geolocation for on-site validation. Increased master’s-degree applications by 70% by expanding enrollment to candidates outside the state, adding automated document analysis and responsive applicant status tracking. Built a configurable course-management platform with direct-mail campaigns, course creation, grading, assignment submission, pluggable educational games, and real-time messaging using a flexible roles-and-permissions model. Developed an online exam and proctoring system with typing-pattern recognition, live P2P camera monitoring, and eye-gaz