Marcelo Hernandes da Silva

Hello, I'm Marcelo Hernandes da Silva

Java Senior Developer | MBA in Solution Architecture | MBA Systems Engineer With IA

Senior Software Engineer with over 25 years in IT, building robust, secure, and scalable solutions. Operating as a "hands-on" Tech Lead: providing technical leadership, mentoring teams, and designing architectures, while staying deep in the trenches. Currently combining backend expertise and legacy modernization with AI/MCP specialization to automate engineering workflows and drive productivity.

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About Me

With over 25 years in IT, I built my career by solving complex business problems through technology. For the past 10 years, I have adopted Java as my core language to architect and deliver robust, secure, and scalable solutions.

I operate as a "hands-on" Tech Lead: providing technical leadership, mentoring teams, and designing architectures, while maintaining my passion for coding and staying deep in the trenches. Currently, I combine this solid background in backend and legacy modernization with my postgraduate studies in Software Architecture, applying Artificial Intelligence (GenAI/MCP) to automate engineering workflows and drive professional productivity to new heights.

At Foursys, I lead the critical microservices migration for the "Debt Communication" product (Equifax SCPC Boa Vista), implement custom encryption/decryption libraries for sensitive client data protection, upgrade core services from Java 17 to Java 21, and partner with SREs to design CI/CD pipelines.

Focus: Java 21, Cloud Migration, Microservices, Technical Leadership, and AI Solutions.

25+
Years of Experience
21
GitHub Repositories
4
Featured Projects

Professional Experience

Java Senior Developer Backend

Foursys

March 2025 - Present

Current

Product & Migration: Led the critical microservices migration for the "Debt Communication" product (Equifax SCPC Boa Vista), ensuring integrity during the cloud transition.

Engineering & Security: Implemented custom encryption/decryption libraries for sensitive client data protection and upgraded core services from Java 17 to Java 21.

Collaborative DevOps: Partnered directly with SREs to design and build CI/CD pipelines for delivering new service features.

Cloud Migration
Security & Encryption
CI/CD Pipelines

Technologies & Tools

Java 21 Spring Boot Cryptography CI/CD GCP Equifax Cloud Microservices

Senior Java Developer

NAVA - Technology for Business

September 2023 - March 2025

BaaS & Payments: Developed high-availability APIs (Bank as a Service) for critical Payment Systems within the banking sector.

Security & Integration: Implemented a robust security layer using Apache Camel to protect and orchestrate integrations.

Data Architecture: Built microservices integrated via Kafka queues for asynchronous processing, ensuring transactional persistence in Oracle databases.

Security Layer
Kafka Integration
Payment Systems

Technologies & Tools

Java Spring Boot Apache Camel Kafka Oracle AWS

Application Developer

Start Security

May 2023 - August 2023

Security & Automation: Implemented and automated security pipelines (SAST/DAST) within CI/CD workflows, ensuring OWASP Top 10 compliance and elevating development security maturity.

DevSecOps
CI/CD Security
OWASP Compliance

Technologies & Tools

GitHub Actions CI/CD Pipelines DevSecOps SAST/DAST

Senior Software Developer

Avanade

November 2019 - March 2023

Modernization (Mainframe to Distributed): Executed the integration of High Platform (Mainframe) systems, transcribing complex business rules to the Low Platform (Distributed Architecture) and transforming them into scalable microservices.

Banking Integration: Developed critical integration APIs for the banking sector (Santander) using Spring Boot and Apache Camel.

Technical Quality: Applied Clean Architecture principles to ensure code maintainability and quality within a transitional environment.

Legacy Modernization
Banking APIs
Clean Architecture

Technologies & Tools

Java Spring Boot Apache Camel Azure Oracle Mainframe Integration

Featured Projects

Smart Order Orchestrator

Resilient order orchestration system with advanced microservices patterns including saga orchestration, idempotency, circuit breakers, and AI-driven risk analysis. Handles 100,000+ simultaneous requests using Virtual Threads.

Java 21 Spring Boot React TypeScript PostgreSQL OpenAI
Code

CCB Espaço Infantil

Comprehensive children's space management system for churches with multi-location support, emergency alerts, capacity monitoring, and activity documentation. Live deployment on Vercel.

Next.js 14 TypeScript Supabase TailwindCSS Vercel
Code

Dashboard Métricas de Código

Modern responsive dashboard for analyzing and visualizing corporate source code statistics. Features async processing, real-time cancellation, pagination, and detailed complexity metrics by language and file.

React 18 TypeScript CSS3 SVG
Code

Portal IA

Modern and scalable platform for intelligent project management. Full-stack solution with JWT authentication, intelligent categorization, Docker containerization, and clean architectural separation.

Node.js Express React 18 PostgreSQL Docker TailwindCSS
Code

Technical Skills

Programming Languages

Java
TypeScript
JavaScript
HTML/CSS

Frameworks & Technologies

Spring Boot
Apache Camel
Quarkus
JPA/Hibernate
React & Redux/Zustand
TailwindCSS

Cloud & DevOps

Google Cloud Platform
AWS (Lambda, SQS, SNS, S3)
Docker

Tools & Methodologies

Git/GitHub
Kafka
Maven/Gradle
REST APIs
N8N Automation
DevSecOps (SAST/DAST)

Get in Touch

Let's Talk!

I'm always open to new opportunities and interesting collaborations. If you have a project in mind or would like to discuss possibilities, don't hesitate to get in touch.

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