Senior Backend Engineer · Systems Architect
22+ years designing and owning backend systems at scale — from hotel infrastructure in the USA to fiscal-tech SaaS in Brazil and AI-driven HR platforms in Europe. I work at the intersection of distributed systems, cloud, and applied AI.
What I do
Backend Architecture
Distributed microservices, event-driven design, API gateway patterns, message queues, and high-throughput data pipelines built for longevity.
Cloud & DevOps
AWS-native serverless and container-based architectures, Kubernetes orchestration, CI/CD pipelines, and infrastructure automation at scale.
LLMOps & Applied AI
Production OCR pipelines, computer vision integration, NLP systems, and Transformer-based model deployment using Hugging Face and OpenCV.
SaaS Platform Design
Full ownership from zero to production — multi-tenant architecture, billing flows, fiscal compliance, and custom workflow engines.
Career
Owns and evolves the backend services powering hotel self-check-in and guest operations across multiple US properties. Designs resilient, event-driven APIs that process real-time booking and identity data at scale, with direct ownership across architecture, delivery, and reliability.
Co-founded and architected a multi-tenant SaaS platform for Brazilian fiscal compliance — covering NFe e-invoice processing, OCR-based document extraction, and custom fiscal workflow automation. Sole architect across backend, cloud infrastructure, and AI pipelines. Built and deployed a multi-engine OCR pipeline (Tesseract + Google Vision + OpenCV) with intelligent fallback logic to handle variance in document quality at scale.
Led backend architecture for an AI-powered HR matching platform serving European markets. Designed the resume intelligence pipeline using OCR and computer vision to extract structured candidate data. Built Kubernetes-deployed microservices with Elasticsearch-powered candidate–job matching at scale.
Earlier Positions
Construction management system — Ruby on Rails, MySQL, Android, CI/CD with Jenkins.
Senior Engineer on an e-learning platform with real-time gamification — Node.js XMPP, Rails REST APIs, AngularJS.
OS-level integrations via Qt, computer vision with OpenCV, multimedia pipelines with GStreamer.
International offshore DMS project bridging German and Brazilian engineering teams.
ERP systems (C# / Oracle), Agile transformation leadership, .NET consulting, reverse auction platform (.NET + SQL Server).
Impact
Co-founded a production SaaS from zero
Built and shipped Pipeleap — a fiscal compliance SaaS platform — from architecture to production, with full ownership of backend, cloud, and AI pipelines. Still live and operating.
Multi-engine OCR pipeline at scale
Designed a document extraction pipeline (Tesseract + Google Vision + OpenCV) with intelligent multi-engine fallback, processing thousands of Brazilian fiscal documents reliably under real-world variance.
Hotel operations infrastructure at Virdee
Owns backend APIs powering hotel self-check-in across multiple US properties — real-time identity and booking processing in a high-availability, event-driven architecture.
AI-driven HR platform architecture
Led the end-to-end backend design of a Kubernetes-deployed resume intelligence platform with OCR/CV extraction and Elasticsearch-powered candidate matching for European markets.
Trilingual international engineering career
Delivered production systems across USA, Germany, Brazil, and Switzerland — collaborating in Portuguese, English, and German across distributed teams on 3 continents.
Agile transformation leadership
Certified Scrum Master (Scrum.org + Scrum Alliance) who led MSF Agile adoption in legacy engineering organizations — driving methodology shift from within.
Technology
Languages
Backend Frameworks
Frontend Frameworks
Data
Cloud & Infrastructure
AI Engineering
AI & Computer Vision
Communication
Portuguese
Native
English
Native / Bilingual
German
Professional Working
Let's talk
cfernandomaciel@duck.com
in/cfernandomaciel
Phone
+55 48 98833-9801
Location
Florianópolis, SC — Brazil