Anderson Monteiro
Senior Software Engineer • Systems Architect
Software Engineer with over 10 years of experience, including 4+ years working remotely for US companies as a contractor. Currently building payment systems and financial infrastructure for US-based fintech companies, with payment processing, reconciliation, and ACH/card integrations. Expertise in Go, Python, and C# .NET Core.
Architected PIX system processing R$1B+/month for Banco Neon serving over 30 million users. Increased reconciliation accuracy from 25% to 99% at fintech for Latin America's largest battery company. Led zero-to-production expense management implementation at Tribal Credit. Building B2B SaaS AI Agents platform.
Key Technical Skills:
Professional Experience
Senior Software Engineer
CurrentRemote🇺🇸 US CompanyUS Fintech Companies (Contractor)
Contract software engineer for US-based fintech companies, delivering scalable payment systems and backend services
Key Achievements:
- Architecting and building payment processing and account management microservices for high-volume fintech platforms
- Implementing zero-downtime migration strategies for critical financial systems
- Managing integrations with financial partners and payment networks (ACH, card processors)
Software Engineer
Remote🇺🇸 US CompanyTribal Credit
Led development of API-driven expense management system from zero to production
Key Achievements:
- Built expense management system from zero to production, adopted by 200+ enterprise clients
- Led hands-on technical team (6 devs, 1 QA, 1 SM, 1 PO)
- Implemented account management data pipelines with Temporal, DBT and Snowflake
Software Engineer
Inmetrics (Banco Neon Client)
Architected and implemented PIX instant payment system for Banco Neon
Key Achievements:
- Architected and implemented PIX instant payment system for 30M+ users
- Led development of core cash-in/out module processing high-volume transactions
- Designed PIX key management system with 99.99% uptime
Software Engineer
Grupo Moura
Led development of financial reconciliation module for Latin America's largest automotive battery manufacturer
Key Achievements:
- Founding engineer establishing engineering best practices and technical guidelines
- Transformed monolithic financial services architecture into Python and Go microservices
- Increased reconciliation accuracy from 25% to 99% through new service architecture
Featured Projects
AI Agent Infrastructure Platform
Personal project building provider-agnostic AI infrastructure for agent-based applications
A side project where I'm deepening my expertise in AI infrastructure by building a provider-agnostic platform from scratch. The system features intelligent model routing across OpenAI, Anthropic, Groq, and Google Gemini with cost-optimized and quality-based selection strategies. Currently implemented: multi-tenant agent management, agentic loops with tool execution, human-in-the-loop approval workflows, streaming support (SSE), and usage tracking. In development: long-term memory, RAG with pgvector, and conversation summarization. Built with Go (Chi, GORM) backend and React/TypeScript frontend. This project represents my ongoing learning journey into AI infrastructure patterns.
Technologies Used
PIX Payment System - Banco Neon
National instant payment system implementation for 30M+ users
Architected and implemented Brazil's PIX instant payment system at Banco Neon, handling 30M+ users and processing over R$1B in monthly transactions. Built the core cash-in/out module and PIX key management system with 99.99% uptime. The system contributed to national PIX adoption reaching 15M+ users in the first year with real-time settlement and reconciliation capabilities.
Technologies Used
Financial Reconciliation Engine - Grupo Moura
Automated reconciliation system improving accuracy from 25% to 99%
Developed an automated financial reconciliation system for Latin America's largest automotive battery manufacturer. The system processes high-volume daily transactions with automated reconciliation, improving accuracy from 25% to 99% through a new service architecture. This resulted in significant annual savings in operational costs and dramatically reduced manual intervention.
Technologies Used
Technical Skills
Deep expertise in building scalable distributed systems and financial infrastructure
Programming Languages
Payment Systems Expertise
Infrastructure & Cloud
Databases & Data
System Architecture
Development Practices
Key Achievements
Testimonials
CEO & Finance Executive at Grupo Moura Startup
“It was great to work with Anderson. He is very sharp and hands on, has a great sense of urgency and also do a good team work.”
View on LinkedIn →Information Security Manager at Grupo Trigo
“Anderson is a competent and proactive professional. Always seeking new challenges and improving the work environment, he is bold and self-motivated. During the time we worked together, we implemented several improvements in IT services. He's a professional who always sought to add value to the organization with new suggestions and up-to-date knowledge.”
View on LinkedIn →Financial Specialist at Grupo Moura
“The definition that comes to mind when I think of Anderson Monteiro as a professional is 'engaged'. Beyond the intelligent developments under his supervision, he goes beyond the technical and seeks to understand the scenario to evaluate and deliver the best within his reach. Without a doubt, a professional who adds value to the team and the organization.”
View on LinkedIn →