Principal Engineer | Distributed Systems Architect | Cloud-Native Platform Builder
Brazil 🇧🇷 | Open to Remote & Relocation Opportunities

LinkedIn | marcelosouzav@gmail.com

I am a Principal-level engineer with over 20 years of experience designing, building and scaling distributed systems.

My core expertise lies in cloud-native architecture, microservices ecosystems and multi-tenant SaaS platforms. Over the last decade, I have focused on building systems that are resilient, scalable and economically sustainable.

I operate at the intersection of deep technical architecture and long-term product scalability.

I have experience leading engineering organizations, but I remain deeply hands-on and architecture-driven.

I work best in environments where:

• Systems must scale horizontally
• Architecture decisions have long-term impact
• Performance and cost must be balanced
• Multi-tenant SaaS complexity exists
• Distributed systems reliability is critical
• Engineering standards need to be defined or elevated

I design systems with:

• Clear domain boundaries (Domain-Driven Design)
• Asynchronous communication patterns
• Event-driven workflows
• Horizontal scalability
• Failure tolerance as a first-class concern

I strongly believe that architecture should enable team autonomy and system evolution over time.

Extensive experience designing cloud-native systems using:

• Kubernetes-based microservices
• Containerized environments
• Infrastructure optimization strategies
• Cost governance (FinOps mindset)
• Observability-first architecture

My focus is not only performance — but sustainable scalability.

Designed and implemented asynchronous systems using messaging platforms such as:

• RabbitMQ
• Kafka (conceptual and architectural level)

Applied patterns such as:

• Event choreography
• Decoupled service communication
• Resilient retry mechanisms
• Eventual consistency strategies

Built and structured multi-tenant SaaS platforms with:

• Logical tenant isolation
• Shared infrastructure optimization
• Scalable campaign processing engines
• Financial transaction layers
• Data analytics pipelines

Key concerns addressed:

• Data isolation
• Concurrency control
• Transaction safety
• Cost-performance balance

Designed from scratch:

• Microservices ecosystem
• Kubernetes infrastructure
• Campaign processing engine
• BI and data analytics layer
• Financial payment integration layer
• Observability stack

Key challenges:

• High concurrency financial operations
• Campaign logic complexity
• Multi-client scaling
• Infrastructure cost optimization

Led architecture across 11 concurrent enterprise-grade projects including:

• Retail marketplace platforms
• Healthcare mobile applications
• Financial product systems
• ERP integrations

Focused on:

• Migrating monolithic systems to microservices
• CI/CD standardization
• Identity provider integration (OAuth2 / OIDC / JWT)
• Architectural governance across multiple teams

Backend

• Java (20+ years)
• Spring Boot
• REST APIs
• Secure authentication flows

Architecture

• Microservices
• Domain-Driven Design (DDD)
• Event-Driven Architecture

Cloud & Infrastructure

• Kubernetes
• Docker
• GCP
• AWS

Messaging

• RabbitMQ

Data

• PostgreSQL
• BigQuery
• MongoDB
• Redis

DevOps

• CI/CD pipelines
• Infrastructure automation
• Monitoring & observability strategies

• Committer & PMC Member at Apache Software Foundation
• Contributor to Java ecosystem initiatives
• Technical author (book on agile architecture)
• Active mentor and speaker

Open source is part of how I refine architectural thinking and contribute to sustainable engineering practices.

I believe:

• Architecture should reduce cognitive load, not increase it.
• Systems must be designed for failure.
• Observability is not optional.
• Technical debt must be consciously managed.
• Cost efficiency is an architectural responsibility.
• Senior engineers must think in systems, not tickets.

• Principal Engineer roles
• Staff Engineer roles
• Platform Architecture
• Cloud-Native Systems
• Distributed Systems at scale
• International environments (Remote or Relocation)

Email: marcelosouzav@gmail.com
LinkedIn: linkedin.com/in/marcelo-souza-vieira

“Build systems that scale technically, financially and organizationally.”