Software Engineer | Java & Cloud Specialist
Fortaleza, CE — Brazil  •  Open to Remote & International Relocation

Software Engineer with extensive background across the software lifecycle, specialized in backend architecture, Java 21, and cloud-native systems.

Currently serving as Head of Communication Technology at the Municipal Government of Limoeiro do Norte (SEGOV), where I architected and engineered mission-critical public administration software implementing Hexagonal Architecture, centralized authentication via Keycloak (OAuth2/OIDC, X.509), and cryptographic digital signatures (PAdES / ICP-Brasil standards).

Previously engineered scalable RESTful APIs and microservices with Spring Boot, Quarkus, and AWS at DataLife Brazil. Holds an MBA in Software Engineering from USP (Universidade de São Paulo) and the AWS Certified Solutions Architect – Associate certification, with strong commitment to clean architecture, distributed systems resilience, and automated testing rigor.

Enterprise Public Administration System · Municipal Government of Limoeiro do Norte

Digital process management and electronic protocol platform modernizing administrative procedures across public departments:

• Architecture: Engineered following Hexagonal Architecture (Ports & Adapters) ensuring complete isolation of domain logic from frameworks and infrastructure.
• Identity & SSO: Centralized identity and access management via Keycloak (OAuth2/OIDC), supporting X.509 client certificate authentication and federal gov.br single sign-on integration.
• Digital Signatures: Integrated cryptographic digital signatures compliant with PAdES (PDF Advanced Electronic Signatures) under ICP-Brasil standards for A1 and A3 hardware/software certificates.
• Automated Quality Gate: Multi-layered test suites combining JUnit 5, Testcontainers (isolated database fixtures), and ArchUnit architecture rule enforcement with strict JaCoCo coverage gates.
• Stack: Java 21 Spring Boot 3 PostgreSQL React TypeScript Docker Keycloak

Production-ready RESTful API for food delivery logistics & order fulfillment

• Highlights: Clean layered design, entity lifecycle management via JPA/Hibernate, query optimization on PostgreSQL, and structured exception handling.
• Stack: Java Spring Boot JPA/Hibernate PostgreSQL Docker REST APIs

Full-stack commerce solution with robust token authentication and product catalog

• Highlights: Stateless JWT authentication, role-based authorization (RBAC), database migrations, and responsive UI integration.
• Stack: Java 21 Spring Boot 3 Spring Security React PostgreSQL Material-UI

Comprehensive logistics system for dispatch operations and delivery fleet tracking

• Highlights: Cross-platform mobile client for drivers paired with backend dispatch administration and real-time operational events.
• Stack: TypeScript React Native Expo Node.js REST APIs

Vehicle access control API with rigorous validation and auditability

• Highlights: Adherence to strict REST constraints, centralized validation, and role authorization with Spring Security.
• Stack: Java Spring Boot Spring Security PostgreSQL Maven

Product catalog and inventory management backend

• Highlights: Layered architecture, pagination, role-based security filters, and unit testing coverage.
• Stack: Java Spring Boot Spring Security JPA / Hibernate PostgreSQL

• MBA in Software Engineering — Universidade de São Paulo (USP / ESALQ)
  • Specialization: Software Architecture, Cloud Computing, Distributed Systems Design
• Postgraduate in Big Data & Data Science — FASUL Educacional
• Postgraduate in Project Management — FASUL Educacional
• B.S. in Analysis and Systems Development — UNOPAR
• AWS Certified Solutions Architect – Associate — Amazon Web Services (AWS)
• Scrum Fundamentals Certified (SFC) — Scrum Alliance

_{Built with architectural discipline & clean code principles. © Josevan Oliveira}