Open to opportunities

Wallison Barroso

@wallisonbarroso

Senior Solutions Architect modernizing mission-critical platforms with Java microservices and scalable distributed systems.

Brazil

Message

What I'm looking for

I’m looking for senior/principal architecture roles where I can lead modernization of high-throughput systems, own API and event-driven design, and partner with business stakeholders to deliver secure, scalable platforms globally.

I’m a results-driven Solutions Architect with a “15-year career” modernizing mission-critical platforms. I specialize in Java (Spring ecosystem), concurrent programming, and microservices—building high-throughput distributed systems that support “140M+ monthly transactions.”

I own the full architectural lifecycle, from monolithic migrations to large-scale container orchestration with “Kubernetes.” I design cloud infrastructure across “AWS/Azure” and implement event-driven messaging with “Kafka, RabbitMQ,” translating complex requirements into secure, scalable solutions.

At Mondelēz, I orchestrated the technical roadmap for a “$250M e-commerce platform” serving “4M+ users,” mentoring and leading a global team of “20 engineers.” I improved payment reliability with multi-channel workflows (a “50% reduction in irregular payments within the first month”) and reduced delinquency by “15%” via Pix and Boleto integration performance.

Before that, I delivered “nationwide high-availability” payroll tax reporting with “100% regulatory compliance,” and led integration programs that delivered “30+ enterprise integrations.” My ethos is clear: align business goals with engineering execution, set strong standards, and deliver measurable reliability at scale.

Experience

Work history, roles, and key accomplishments

Current

Senior Solutions Architect

Current

Mondelēz

Jun 2023 - Present (3 years)

Orchestrated the technical roadmap for a $250M e-commerce platform serving 4M+ users across LATAM, aligning product and business goals with partner stakeholders. Led 20 engineers and improved payment performance by reducing irregular payments 50% in the first month and delinquency rates 15%.

Java Spring Boot Microservices Event Driven Architecture Apache Kafka AWS MongoDB Redis Kubernetes

Integration Architect

Dublin City University

Apr 2020 - Jun 2023 (3 years 2 months)

Directed a team of 7 integration engineers and delivered 30+ enterprise integrations connecting legacy systems, SaaS, and cloud services across AWS, Azure, and GCP. Implemented secure integration patterns and API governance (encryption/auth) adopted as a benchmark across organizational teams.

Enterprise Integration Boomi GraphQL REST SOAP Azure Service Bus RabbitMQ & Security

Solutions Architect

Deloitte

Nov 2017 - Apr 2020 (2 years 5 months)

Architected nationwide high-availability payroll tax reporting platforms for the Irish government supporting 3M+ users while maintaining 100% regulatory compliance. Led a transition from monolithic systems to microservices and implemented fault-tolerant messaging with monitoring for real-time, high-volume processing.

Java Microservices CI CD Docker ELK Stack Prometheus Grafana MuleSoft SSO JMS

Enterprise Architect

NTT Data

Aug 2016 - Nov 2017 (1 year 3 months)

Defined enterprise integration architecture covering API-led connectivity, messaging, ETL, and cloud components. Coordinated multinational teams and participated in architecture governance to ensure alignment between business strategy, architecture standards, and delivery execution.

Enterprise Integration API Led Connectivity Messaging ETL Cloud Architecture Architecture Governance

Senior Software Engineer

Confluence

May 2015 - Aug 2016 (1 year 3 months)

Implemented integration solutions for 3,000+ retail stores supporting oBoticario and led POS integration design for scalability, reliability, and operational stability. Supported production rollouts and large-scale deployments across geographically distributed stores.

POS Integration Scalability Reliability Engineering Performance Optimization

Software Engineer

Unimed

Jul 2010 - Mar 2015 (4 years 8 months)

Developed healthcare system integrations across 9 hospitals within Brazil’s largest healthcare network, integrating EHR, HIE, and clinical systems for secure and reliable data exchange. Improved interoperability and data consistency using HL7 and FHIR standards.

Healthcare Integration HL7 FHIR EHR Integration HIE System Integration