Open to opportunities

Thalles Melo

@thallesmelo

Message

I modernize high-scale financial backend systems with .NET, microservices, and cloud-native AWS and GCP architectures.

Brazil

Message

What I'm looking for

I'm looking to build and modernize high-scale financial or regulated systems, leading backend architecture, cloud-native delivery, and reliable event-driven platforms.

I've built and modernized large-scale financial systems for BMG Bank, BTG Bank, Neon Bank, and BS2 Bank over 18+ years. My work centers on .NET, microservices, cloud-native platforms, and reliable APIs for regulated, high-load environments.

At BTG Bank, I designed fraud prevention and incident-management systems for high-value PIX transactions and rebuilt a compliance process from 4–5 days to under 15 minutes. At BS2 Bank, I reduced a critical daily reconciliation process from 2–3 hours to around four minutes through SQL Server optimization.

I've led backend engineers, delivered Open Banking integrations, and supported production systems with AWS, GCP, Kubernetes, Kafka, RabbitMQ, and CI/CD. I focus on practical modernization, event-driven architecture, and improving reliability without disrupting critical banking workloads.

Experience

Work history, roles, and key accomplishments

Current

Senior Engineer Developer

Current

BMG Bank

May 2025 - Present (1 year 4 months)

Led modernization and refactoring of legacy backend systems in a large-scale financial environment, applying SOLID, DDD, and Clean Code principles. Designed cloud-native microservices and supported CI/CD pipelines and Kubernetes deployments.

C#ASP.NET Core MySQL Redis GCP GKE Cloud Run Pub Sub Docker Kubernetes CI CD SOLID DDD Clean Code Microservices

Senior Engineer Developer

BTG Bank

Feb 2024 - Feb 2025 (1 year)

Designed and implemented backend systems for fraud prevention and incident management supporting high-value PIX transactions. Re-architected a critical compliance process, reducing reporting time from 4-5 days to under 15 minutes.

C#.NET Core AWS DynamoDB RDS S3 Distributed Systems CI CD Fraud Prevention Incident Management

Tech Lead

Neon Bank

Aug 2022 - Oct 2023 (1 year 2 months)

Led a backend team of 3+ engineers, owning technical decisions and system design. Delivered Open Banking integrations and a high-risk regulatory compliance project, preventing regulatory penalties.

C#Microservices Kafka RabbitMQ MongoDB AWS CI CD Event Driven Architecture Open Banking Leadership

Senior Analyst Developer

BS2 Bank

Dec 2016 - Aug 2022 (5 years 8 months)

Developed and maintained backend systems for banking and financial products, including integrations with legacy systems. Optimized a SQL Server stored procedure, reducing processing time from 2-3 hours to around 4 minutes.

C#ASP.NET MVC .NET Core SQL Server WCF Performance Optimization Legacy Systems