🇧🇷 PT

Software & Solutions Architect

I architect systems that scale with your business.

13+ years designing distributed systems on AWS for banks, fintechs, and SaaS. Expert in microservices, Kubernetes, legacy modernization, and observability. From design to deploy — focused on availability and security.

GitHub LinkedIn Resume

Availability

Open to opportunities

On-demand projects · Remote squads

Location

João Pessoa, Brazil

Remote · UTC -3 to +2

Snapshot

Overview

December 2025

Main Stack

Daily technologies

From backend to infrastructure — the technologies that power the systems I design and deliver.

AWS (EKS/Lambda)Java · Spring BootNode.js · TypeScriptPHP · LaravelGoTerraformDocker · Kubernetes

Location

João Pessoa · Remote

Available for global projects in UTC -3 to +2 timezones.

Contact

marcello.dudk@gmail.com

GitHub Stats

  • 19+

    Public repos

  • 13+

    Years of experience

  • TS

    Main language

Current Focus

Currently learning

Well-Architected Framework
Design Patterns avançados
Golang
Rust

About

Hi, I'm Marcelo Jr

Solutions Architect and Backend Engineer with 13+ years of experience in high-criticality financial systems. Former at Itaú Unibanco, Dock, Leads2b and Conductor. Available for consulting, short-term projects and remote squads.

Distributed systems design focused on resilience and observability.

Monolith modernization using Strangler Fig and event-driven architecture.

DevOps as culture: IaC, CI/CD, monitoring and zero-downtime deploys.

Experience

Relevant projects and deliveries

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EKS topology + financial integrations

Itaú Unibanco · Solutions Architecture

EKS as Standard Platform

Problem

Critical microservices ran on ECS Fargate with low observability and governance.

Architectural Solution

Designed blueprint to migrate workloads to Amazon EKS, standardizing deploys, logs/metrics mesh and integrations with credit products.

Results

  • Increased operational control and troubleshooting in minutes
  • Platform ready for new portability and external guarantees products
AWS EKSEC2SNS/SQSDynamoDBJava
Learn more

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Circuit breaker in serverless architecture

Dock · Squad Athos

Circuit Breaker in Payments Core

Problem

Cascading failures between Lambda microservices affected payment slip processing.

Architectural Solution

Implemented resilience patterns, centralized telemetry and RDS optimization to absorb transactional peaks.

Results

  • Stability during external intermittencies
  • RDS bottleneck reduction with tuning focused on critical queries
AWS LambdaAPI GatewayRDSCloudFormationNode.js
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Monolith → microservices evolution

Leads2b · SaaS Platform

Modernization at Leads2b

Problem

PHP monolith limited scalability and continuous delivery.

Architectural Solution

Decoupled critical modules to Node.js/TypeScript microservices, adding Redis, ElasticSearch and RabbitMQ queues.

Results

  • New features with independent deploy
  • Performance improvements in searches and marketing workloads
Node.jsTypeScriptRedisElasticSearchRabbitMQ
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Skill Layers

Capability map by layer

AWS Architecture

HA, resilience and container orchestration.

4 items
  • EKS · ECS · Lambda · EC2
  • SNS/SQS · API Gateway
  • DynamoDB · RDS · Glue
  • CloudFormation · CloudWatch

Backend

Event-driven Java and Node.js.

4 items
  • Spring Boot · Microservices
  • Node.js · TypeScript · Express
  • Event-driven · DDD
  • RESTful APIs · System Design

Modernization

Strangler Fig and legacy coexistence.

4 items
  • PHP/Java monolith decomposition
  • Safe data migration
  • Mainframe integration
  • Progressive rollout without downtime

Data & Observability

Tuning, messaging and databases.

4 items
  • PostgreSQL · MySQL · SQL Server
  • MongoDB · Redis · ElasticSearch
  • RabbitMQ · SQS
  • Circuit Breakers · Retries

Open Source

Featured projects

Personal projects showcasing my work

Skriba

SaaS

Complete church management system focused on uncomplicated financial management and deliberative assemblies.

Mession

SaaS

Platform connecting missionaries, supporters and agencies — centralizing support and communication.

Hubbio

SaaS

Your bio links hub. Share your bio and all your links on a customized, beautiful, and modern page.

Runasty

TypeScript

Competitive running leaderboard integrated with Strava. 5K, 10K and half marathon.

Boardscore

TypeScript

Real-time digital scoreboard for board and card games.

 View all repos →