Hi, I'm Patrick Araujo

About Me

Backend Software Engineer | Automation, API Integrations & Scalable Systems

I build backend services, real-time data pipelines, and API integrations that eliminate manual processes and turn business workflows into reliable, high-performance systems.

Professional Experience

Solutions Architect (Backend & Systems Integration) — Loja do Sapo
April 2026 – Present

• Architected and led internal backend systems (Python, PostgreSQL) supporting 8K–12K daily transactions.
• Automated reporting workflows via APIs and GitHub Actions, eliminating ~3 hours/day per analyst.
• Engineered ETL pipelines integrating Google Cloud, Zoho, and third-party services, reducing data processing time by about 40%.
• Built a real-time internal platform with dashboards and custom filters for direct operational visibility.
• Defined system architecture, technical standards, and backend governance across internal projects.

Software Engineer (Backend & Automation) September 2025 – March 2026

• Integrated REST APIs (Python, Node.js) across 6+ core systems (Google Cloud, Zoho, third-party services).
• Automated data extraction and enrichment workflows, reducing manual input and improving data quality.
• Optimized backend performance with caching and async processing, improving API response times by 35-40%.
• Maintained AWS services (S3, Lambda) supporting backend processes and file handling.
• Built business rules and automation logic to enforce operational constraints.

Software Developer (Data & Workflows) October 2024 – August 2025

• Implemented 20+ automated workflows and business rules (Python, Deluge) to reduce repetitive operational tasks.
• Built data pipelines and reporting structures for real-time tracking and compliance.

Systems Integration Architect — iCaiu
December 2025 – Present

• Architected and integrated data exchange across 4+ platforms using API-first strategies.
• Automated financial and operational workflows, replacing manual spreadsheet-based reporting.
• Built centralized dashboards and data pipelines for real-time business monitoring.
• Defined API authentication, integration standards, and data flow governance for external services.

Software Engineer (Systems Integration) March 2025 – November 2025

• Developed backend communication layers and API integrations (Python, REST) across multiple systems to improve data reliability.
• Tested and debugged 15+ integration endpoints, resolving critical automation bottlenecks.
• Supported AWS infrastructure (EC2, RDS) and backend services for distributed systems.

Operations & Tech Support Specialist — WR Auto Peças
November 2015 – February 2026

• Developed 25+ Python automation tools for administrative and inventory processes, saving about 30-35 hours/week.
• Designed internal systems for inventory control, product tracking, and delivery management using local servers with cloud backup.
• Maintained operational systems with focus on data accuracy and compliance.
• Built and maintained internal web tools and company website (HTML, CSS, JavaScript).

Core Skills

 Backend

• Python, Node.js, SQL, JavaScript
• Fastify, NestJS, Deluge

 APIs & Integration

• REST APIs, Webhooks, API-first design, third-party integrations (Google Cloud, Zoho, ERP)

 Automation

• Workflow automation (Python, Deluge, n8n, Zoho), ETL pipelines, scheduled data processing

 Cloud

• AWS (EC2, S3, Lambda), Docker, server-side scripting, deployment foundations

 Data

• Data modeling, ETL, SQL optimization, PostgreSQL, Looker Studio, Power BI

Selected Certifications

 Automation, AI & Security

• Google AI Essentials, Responsible AI Foundations, Prompting Essentials.
• Google Cybersecurity Professional, Network Security, Incident Response.

 Cloud & Infrastructure

• AWS Cloud Quest: Cloud Practitioner (Infrastructure, VPC, IAM, Cloud Economics).
• Linux/SQL foundations, Datadog Foundation.

 Software Engineering & Automation

• Python with RPA and Real Project Creation (221h), Python for Backend (Santander).
• Complete C# OOP + Projects (38h), Algorithms and Programming Logic (Java, C, C++, C#).
• Process Automation (n8n, Zoho), Webhooks, API Design.

 Data & Analytics

• Excel Advanced, Macro and VBA + Power BI (268h), Computer Skills + Power BI (217h).
• Foundations of Project Management (Google).

 Languages

• Business English (Santander), English Fundamentals (University of Pennsylvania), English (Kultivi).

Education

Bachelor of Engineering Candidate
Centro Universitário Newton Paiva
2024 – 2028

Enterprise Production Systems & API Management

•   Documentation hub for integration specs, data flows, and API contracts.
•   Worker that automates token renewal and secret handling.
•   Worker that syncs Zoho CRM data to Google Sheets with rate-limit control.
•   Worker that extracts customer metrics and event logs for BI.
•   Worker for message log processing and delivery status tracking.
•   ERP integration service syncing financial and inventory data on automated cycles.
•   Worker that syncs Omie ERP sales, rep metrics, and product data to Sheets.

Software Engineering & System Architecture

•   AI assistant with intent-aware RAG, controlled orchestration, KV caching, and multi-provider LLM fallback (Groq → OpenRouter) on Cloudflare Workers.
•   Backend monorepo with Node.js/Fastify and Playwright end-to-end validation, designed for scalable API services and automated testing pipelines.
•   Multi-tenant NestJS backend with RBAC, isolated tenant data, and BullMQ job processing.
•   Security proxy that protects API traffic with encryption and data masking for sensitive fields.
•   Event-driven webhook service with HMAC validation and OpenTelemetry tracing.
•   Monitoring and remediation service that automates infrastructure recovery after anomalies.
•   C++ system utility focused on CPU scheduling and resource optimization techniques.
•   Deployment reference with Docker delivery, IaC setup, and CI/CD workflows.

 Professional Stack & Automation

 Academic & Certifications

GitHub Stats