Hello, I'm
Belém, Pará, Brazil
Fullstack software engineer with nearly 14 years of experience specializing in scalable architecture and high-availability systems. Deep expertise in backend development with NestJS, Node.js, and Express, applying DDD, Onion Architecture, and SOLID principles. Proven track record in real-time communication systems, observability stacks, privacy-first AI integration with local LLMs, and full-stack delivery across healthtech, fintech, and SaaS domains.
A broad stack built through 14 years of hands-on enterprise and product development
A decade of building scalable systems across four continents
Nexton (client: Trellisrx)
EsimFacil
Alfaconsul
Jamango
Virgo Solutions
Maitha Tech
Appgami
Zenklub
Conaz
BitX
Kronos – Tecnologia & Informação
Banco do Brasil
Corporate work under NDA/IP — these case studies highlight impact and approach without exposing clients or code
Healthcare SaaS platform serving hundreds of concurrent clinical users
Critical race conditions causing synchronization failures across multi-client sessions, leading to data inconsistencies
Designed WebSocket service from scratch using NestJS + Socket.io with proper concurrency control and event-driven architecture
94% improvement in WebSocket reliability; eliminated synchronization failures in production
Healthcare platform needing AI-powered features without exposing proprietary or patient data to third parties
External AI APIs posed compliance and IP risks for sensitive medical data
Deployed on-premise LLM stack with Ollama, benchmarking Llama, Mistral, Qwen, and DeepSeek models against available hardware to find the best performance/resource trade-off for each use case
AI-powered code generation, data analysis, and diagnostic assistance — with zero external data exposure
High-traffic production system with slow incident response and no centralized logging pipeline
High mean time to resolution (MTTR) due to fragmented, unstructured server logs across multiple services
Implemented Grafana + Promtail + Loki pipeline for real-time log ingestion, alerting, and analysis
~60% reduction in MTTR; production incidents diagnosed in seconds instead of hours
Early-stage eSIM startup without an online presence or lead capture mechanism
Zero web presence, poor Core Web Vitals, and low lead conversion rate
Built Next.js landing page with heatmap-driven UX (Microsoft Clarity), on-page SEO, and CTA optimization
47% lift in lead conversion; Core Web Vitals performance score reached 97%
SaaS product for engineering teams managing issues across multiple VCS platforms simultaneously
Manual overhead triaging and tracking issues across GitHub, GitLab, and Bitbucket caused delays
Full-stack app with OpenAI integration for automated issue triage and PR suggestions across all platforms
MVP delivered and validated; significantly reduced manual repository management overhead for teams
Platform serving multiple retail brands on a single shared backend infrastructure
Architecture needed complete tenant isolation while efficiently sharing compute resources
Modular NestJS API with Kafka event streaming and MongoDB, designed for independent brand configurations
Scalable multi-tenant system enabling rapid onboarding of new retail brands
Public, live work — products and landing pages I delivered end to end
A platform connecting environmental projects, investors and companies with traceability and trust. I built the digital presence and tech foundation to turn environmental action into verifiable impact.
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A school-management app to follow a student's academic life: grades, attendance, subjects and calendar. I delivered a mobile experience for schools and guardians.
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An installable PWA with offline access for leadership management. I built the mobile-first experience with authentication, KPI dashboards and registration rankings.
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A high-conversion landing page for a public speaking and rhetoric course. I built a persuasive page with a bold hero and an enrollment-focused journey.
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An online women's fashion store integrated with Yampi. I built an elegant storefront with catalog, promotions and a purchase flow, including custom-piece requests.
View projectamong other projects
Federal University of Pará (UFPA)
Open to senior engineering roles and interesting technical challenges
Based in Belém, Brazil — available for remote positions worldwide. Feel free to reach out for engineering roles, consulting, or technical discussions.