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Thiago Rafael Ferreira

@thiagorafaelferreira

Message

Senior Java backend engineer building scalable microservices with AWS and Kafka.

Brazil

Message

What I'm looking for

I’m looking for a team where I can build scalable microservices and high-performance backend systems with Java/Spring, Kafka, and AWS. I value agile delivery, strong collaboration, and solving real production problems while mentoring teammates.

I’m a Senior Backend Engineer with over 10 years of experience designing and developing high-performance corporate systems. I focus on scalable, cloud-native solutions—especially with Java, Spring, Kafka, Docker, and AWS.

At Clara, I designed and developed cards features to manage physical and virtual cards, including integrations with third-party systems like Mastercard and Minsait. I also built and integrated a new 3DS service to replace an old one, configure webhooks, and align delivery with Clara managers and APATA, while working to reduce costs.

In addition, I developed core capabilities such as country taxes, charge management, and card plan-based accountability. I tackle production issues like duplicated transactions, unprocessed transactions, and mismatched accountability—and I support onboarding by sharing product and technical decision context.

Previously at GFT Group (Itaú), I architected and built a system on AWS EMR to process 1GB+ files and transform them into JSON structures for data teams to enable earlier credit. I’ve also delivered integration services, insurance flow features, and modernized legacy financial systems through Spring Boot and React/Angular—always with an agile, delivery-focused mindset.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Engineer

Current

Clara

Jan 2022 - Present (4 years 5 months)

Designed and developed card features to create physical/virtual cards, organize spends, and integrate with third-party providers such as Mastercard and Minsait. Built and integrated a new 3DS service using webhooks, and resolved production issues including duplicate/unprocessed transactions and mismatched accountability.

Java Spring Boot REST APIs PostgreSQL Apache Kafka AWS RDS SQS Parameter Store Webhooks Docker

Senior Java Developer

GFT Group (Itaú)

Sep 2020 - Jan 2022 (1 year 4 months)

Architected and developed an AWS EMR-based pipeline to process 1GB+ files and transform them into a new JSON structure for data teams. Implemented integrations using Java/Spring Boot and event-driven messaging to support high-volume, time-sensitive processing.

Java Spring Boot AWS Lambda Apache Kafka Elasticsearch AWS Parameter Store Git

Senior Java/Kotlin Developer

Tools Software (TOTVS and Sicredi)

May 2019 - Aug 2020 (1 year 3 months)

Developed integration services for TOTVS products inside Sicredi's hiring credit journey, including the insurance flow offered to customers. Built Android front-end components and implemented service integrations using Kotlin and Spring Boot.

Java Kotlin Spring Boot REST APIs MongoDB Kong Gitlab Jenkins

Full Stack Developer

SRM Asset

Nov 2018 - Apr 2019 (5 months)

Modernized legacy systems by refactoring code and implementing new features to improve reliability and maintainability. Delivered full-stack changes using Java Spring Boot services and Angular user interfaces backed by SQL Server.

Java 8 Spring Boot Maven Angular SQL Server Gitlab REST APIs Refactoring

Full Stack Developer (Java/React)

Zallpy Group (Unicred and ADP Brasil)

Nov 2016 - Nov 2018 (2 years)

Helped form a new team and drive modernization of a financial system, replacing legacy components with microservices deployed to production. Built multiple React single-page applications for ADP Brasil, including configuration management, appointments, and clock in/out flows.

Java Spring Boot Microservices Oracle JBoss SOAP React Angular REST APIs Gitlab

Full Stack Developer

TECHNOCORP (Panvel)

Nov 2014 - Mar 2016 (1 year 4 months)

Designed and developed retail features to manage product bundles and customer purchase flows on the platform. Built an integrated system to register prescription data and apply discounts based on database validations using Java and Spring Boot.