Hi, I'm
Patrickerson
Senior Backend Developer
With 8+ years of experience building scalable systems and APIs.
About Me
I've been passionate about technology and innovation since childhood and believe it is the foundation for building a fairer and more efficient society. As a hemophiliac, I understand the vital role of innovation: just as medical treatment gives me the quality of life to move forward, I see in technology the power to expand the boundaries of what is possible for people. Beyond code, I'm driven by curiosity. I find balance and new perspectives through traveling, cooking, writing poems, or diving into the complexity of Russian culture and language.
Work Experience
Senior Fullstack Developer
2025-PresentFarmajob
Working on an ongoing project since 2025, integrating ERPs with e-commerce platforms, implementing payment gateways, and building checkout systems. Also responsible for connecting B2C systems with ERP backends, ensuring seamless data flow and synchronization.
Main Results
- •Integrated multiple ERPs with e-commerce platforms for real-time inventory and order sync
- •Implemented payment APIs (credit card, Pix, etc.) and built a unified checkout system
- •Developed bidirectional integration between the B2C front-end and ERP backend for customer, product, and order data
- •Ensured high availability and data consistency across heterogeneous systems
Senior Backend Developer
2024-2025Tributo Devido
Responsible for the architecture that enabled the analysis of over R$100 billion in tax data and the recovery of +R$1 billion in tax credits. Led the design of distributed systems, scalable ELT pipelines, and AI agents based on LLMs, ensuring automation of complex tax rules and large-scale processing.
Main Results
- •Analyzed over R$100 billion in tax data
- •Recovered +R$1 billion in tax credits
- •Architected distributed systems and scalable ELT pipelines
- •Implemented AI agents with LLMs for tax rule automation
Co-author (PIBIC Scholarship Holder)
Part time 2024-2025Knowledge-Based Systems (Elsevier) / PUCPR
Visemble: A fast ensemble approach for time series classification with multiple visual representations. Conducted research under a PIBIC scholarship from PUCPR, contributing to the validation and methodology of a novel ensemble method.
Main Results
- •Developed a novel ensemble method for time series classification
- •Achieved state-of-the-art accuracy with significantly reduced computational time
- •Published in Elsevier's Knowledge-Based Systems journal
Recent Projects
Unified Checkout with Multiple Payment Gateways
A modular checkout system for e-commerce integrating Pix, credit card, and bank slips. Processed over R$150,000 in sales with high availability and real-time ERP synchronization.
Real-Time ETL Pipeline for ERP-B2C Synchronization
ETL routines enabling bidirectional integration between e-commerce platforms and legacy ERPs, ensuring consistent synchronization of products, inventory, orders, and customers while reducing latency from hours to minutes.
Microservices Architecture for Tax Thesis Analysis
A microservices architecture designed to automate large-scale tax thesis analysis. Processed over R$100 billion in tax data, enabling the recovery of more than R$1 billion in credits.
Tax Thesis Automation with LLMs
AI agents leveraging Large Language Models (LLMs) to automate the identification and validation of tax theses. Reduced analysis time from months to days when handling massive volumes of tax data.
LLM SDR on WhatsApp
AI-powered Sales Development Representative (SDR) agent built on a highly available microservices architecture. Leverages DynamoDB for real-time sales context, enabling LLMs to qualify leads and drive conversions via WhatsApp. Supports 1,000 concurrent conversations with sub-500ms response latency.
What People Say
"I enjoyed working with Patrickerson, agile and dedicated to delivery."
Gustavo Ribeiro
CEO Tributo Devido, a high-growth startup (100M+ USD)
"Patrickerson was sensational! A young man with a truly collaborative spirit—warm and a pleasure to work with! Always available and interested. Knowledgeable in what he set out to do. Thank you very much and I'm sure this will be just the first job together! Best, Peterson"
Peterson Satyro
CEO, Arroba Informatica
"Patrickerson delivered exactly what was requested and went beyond, contributing his expertise to enrich the project."
Oscar Quiroga
CEO, Quiroga comunicações
"Patient, pleasant person, and truly knows his craft. I strongly recommend Patrickerson's work!"
Pedro Gabriel
Client
Let's work together?
Do you have a project in mind, any questions, or just want to have a nice chat about technology? Feel free to reach out via the contacts below.