Open to opportunities

André Carvalho

@andrcarvalho

Senior Java Software Engineer at Mastercard, delivering Click to Pay integrations and modernizing 50+ card-acquiring applications.

Brazil

Message

At Mastercard, through GFT Technologies, I own the backend design and delivery of Click to Pay integrations across client banks. I'm integrating Click to Pay with Passkeys into Rede's payment link solution and modernizing 50+ card-acquiring applications with Java 21 and Kafka.

Before moving to the Rede project, I was Tech Lead for PicPay's Subscription Hub. I designed its architecture and led delivery of a service classifying card and Open Finance transactions, processing 500,000+ transactions daily with event-driven microservices.

At Deutsche Bank, I designed and built the User Manager application for client permissions and operational limits across banking products. I also maintained and modernized legacy modules.

At SulAmérica, I built an interoperability platform that integrated healthcare partner APIs and translated clinical data into HL7 FHIR. My background also includes banking, payments, and government tax systems, alongside academic research in machine learning and computer vision at Universidade Federal do Maranhão.

Experience

Work history, roles, and key accomplishments

Current

Senior Java Software Engineer · via GFT Technologies

Current

Mastercard

Nov 2025 - Present (11 months)

Consulting engagement through GFT Technologies (my employer since Feb 2020). Part of a multi-year Mastercard engagement where I own the backend design and delivery of Click to Pay integrations across client banks — currently Rede, Itaú Unibanco's merchant acquirer, previously PicPay — and I'm often the developer Mastercard's integration managers call when a critical issue needs to be resolved.

•

Java Tech Lead · via GFT Technologies

Mastercard

Jan 2025 - Oct 2025 (9 months)

Consulting engagement through GFT Technologies (my employer since Feb 2020). Part of the same multi-year Mastercard engagement — Click to Pay integrations across client banks — before moving to the Rede project.

• Tech Lead for the Subscription Hub in the PicPay app: designed the architecture and led the end-to-end delivery of a service that classifies credit card and Open Finance transactions in

Senior Java Software Engineer · via GFT Technologies

Deutsche Bank

Jun 2022 - Jan 2025 (2 years 7 months)

Consulting engagement through GFT Technologies (my employer since Feb 2020), embedded in a global Deutsche Bank team across Brazil, India, Singapore and Germany.

• User Manager application: designed and built the system that controls client permissions and operational limits across banking products (account limits, checks, credit/debit cards and financial instruments).
• High-availability backend

Senior Java Software Engineer · via GFT Technologies

SulAmérica

Feb 2020 - Jun 2022 (2 years 4 months)

Consulting engagement through GFT Technologies (my employer since Feb 2020).

• Interop Connector: built an interoperability platform on GCP (Cloud Functions) that integrates third-party APIs from hospitals, clinics and healthcare partners and translates clinical data into the international HL7 FHIR standard, using Kafka, GCP Pub/Sub, Redis and Node.js integration services.
• Screening application

Senior Java Software Engineer · via Accenture

Santander Brasil

Sep 2019 - Feb 2020 (5 months)

Consulting engagement through Accenture (my employer, Sep 2019 – Feb 2020).

• Santander Friends: designed and built Java 8 / Spring Boot microservices for a platform that lets Santander employees donate part of their profit-sharing bonus (PLR) to charitable institutions, persisting to Oracle.
• Deployed on Red Hat OpenShift with Jenkins CI/CD pipelines, and implemented batch integration jobs with

Java Developer

D2TI INC.

Oct 2017 - Aug 2019 (1 year 10 months)

Government tax systems for Brazilian states and municipalities.

• Developed and maintained tax management and fiscal revenue applications for the states of Maranhão, Bahia and Piauí, with a JSF/RichFaces frontend and a PL/SQL + Oracle backend.
• Modeled complex state and municipal tax business rules with JPA/Hibernate, covered by JUnit tests and SonarQube quality gates, in Scrum/Kanban teams usin