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Marcelo Jr

Software & Solutions Architect

📍 João Pessoa, Brazil

📧 marcello.dudk@gmail.com

📱 +55 (83) 98831-7867

🔗 linkedin.com/in/marcelo-jr-9698874a

💻 github.com/jrmarcello

Specialist in high-criticality financial systems with 13+ years of experience, leading distributed architectures on AWS, Kubernetes migrations, monolith decomposition and implementing observability and IaC for credit products, payments and BaaS platforms.

AWS architecture with HA, resilience and microservices/Serverless patterns (EKS, ECS, Lambda)
Backend engineering with Java (Spring Boot) and Node.js/TypeScript in event-driven flows
Legacy modernization using Strangler Fig, safe data migration and mainframe coexistence
Data & Infrastructure: RDS/DynamoDB tuning, messaging (RabbitMQ/SQS) and observability

Professional Experience

Solutions Architect

Itaú Unibanco

Mar 2022 · Sep 2025 · João Pessoa, Brazil

Design of highly complex distributed architectures on AWS ensuring rigorous security, scalability and resilience requirements.

  • Migration of critical microservices from ECS Fargate to Amazon EKS with centralized observability
  • Credit product architecture (portability and external guarantee) with secure integrations
  • Strangler Fig strategies to modernize mainframes and monoliths without downtime

AWS (EC2, EKS, ECS, Lambda, SNS/SQS, Glue, DynamoDB), Java, Microservices, DDD

Senior Software Engineer

Dock

Nov 2020 · Mar 2022 · João Pessoa, Brazil

Squad responsible for Payments and Payment Slip Management core in BaaS platform with serverless architecture.

  • Circuit Breaker implementation between microservices preventing cascading failures
  • RDS optimization for transactional peaks with advanced query tuning
  • IaC governance in CloudFormation ensuring auditable environments

AWS Serverless, Lambda, API Gateway, RDS/DynamoDB, CloudFormation, Node.js, Java

Software Engineer

Leads2b

Jan 2020 · Sep 2020 · Curitiba, Brazil

B2B SaaS platform for commercial intelligence focused on core modernization.

  • PHP monolith decomposition to Node.js/TypeScript microservices
  • Redis and ElasticSearch usage for performance and search improvements
  • RabbitMQ queues for async marketing automation workloads

Node.js, TypeScript, PHP, Vue.js, MySQL, Redis, ElasticSearch, RabbitMQ

Software Engineer

Conductor Tecnologia

Feb 2019 · Dec 2019 · João Pessoa, Brazil

Clearing squad ensuring financial accuracy in card settlement.

  • Batch routine optimization in PL/SQL for high transaction volume
  • Java/Spring microservices maintenance for reconciliation rules
  • Critical incident analysis and resolution in banking core

SQL Server, PL/SQL, Java, Spring Boot, Batch Processing

Previous Experience

Full Stack Developer

Assert Polo Embrapii Apr 2017 · Jan 2019

Node.js microservices, Vue.js SPAs and MongoDB for high-performance industrial operations.

Software Engineer

Evomaster Tecnologia Jan 2015 · Apr 2017

Full cycle on real estate SaaS Havite, applying SOLID/Clean Code in PHP architecture.

Software Engineer

State Secretary of Administration of Paraíba Dec 2012 · Dec 2014

Government systems maintenance in PHP and MySQL migration scripts.

Software Engineer

Grupo e-Gen Sep 2011 · Jan 2012

Java and Spring Framework backend development for enterprise corporate systems.

Academic Researcher

S.I.D.E. Research Group Mar 2011 · Jan 2014

R&D in data mining and Semantic Web (OWL/RDF), with academic publications.