Fernando Limeira

Sr Java Developer

Java • Spring Boot • ReactJS • Oracle • Authentication

I'm a Sr Software Engineer with 15+ years of experience building and modernizing backend systems in Brazil and Canada. Strong background in Java, Spring Boot, APIs, authentication/SSO, and cloud-based architectures, with hands-on experience integrating legacy platforms with modern solutions using AWS, OAuth2, OIDC, and distributed system patterns. Known for improving performance, simplifying complex workflows, and delivering pragmatic, scalable solutions in enterprise environments.

Enterprise Development

Java, Spring, Oracle, WebLogic, legacy systems

Authentication & Security

JWT, SSO, Cognito, Spring Authorization Server

Full-stack Projects

ReactJS, Spring Boot, PostgreSQL, Docker

Professional Experience

Senior Software Engineer - CaRMS

Feb 2025 - Present • Ottawa, ON, Canada

Software Engineer - ThinkOn Inc.

Apr 2023 - Feb 2025 • Toronto, ON, Canada

NodeJS Engineer - Authvia - Iteris

Oct 2021 - Apr 2023 • Sao Paulo, SP, Brazil

Java Engineer - Telefonica Brazil - Indra Company

Apr 2020 - Oct 2021 • Joao Pessoa, PB, Brazil

Software Developer - A.C. Paz Construction

May 2018 - Dec 2019 • Toronto, ON, Canada

Java Engineer - Unimed Fortaleza

Earlier experience • Fortaleza, CE, Brazil

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Personal Projects

Conquest Global

Real-time multiplayer territory strategy game

React
TypeScript
Java
Spring Boot
PostgreSQL
WebSocket

SSO Platform

Authentication and single sign-on study project

Java
Spring Security
OAuth2
PostgreSQL

Farm SaaS

Multi-tenant farm operations platform with modular services

ReactJS
Java
Spring Boot
PostgreSQL

FLN Track SaaS

Multi-tenant SaaS for construction operations management

ReactJS
Java
Spring Boot
PostgreSQL

AI Gym System

Workout planning with AI-assisted training suggestions

ReactJS
Java
Spring Boot
Gemini