Welcome to Raphael Sena's Portfolio! đ
About
Raphael Sena is a software developer who has evolved from hands-on IT support to building and modernizing real-world mobility and ERP systems. After early international experience studying in Sydney, he started his career in Service Desk/Help Desk roles, developing a strong foundation in troubleshooting, networks, hardware, and enterprise support. That customer-facing technical base later led to software engineering. Today, he works as a Fullstack Engineer at Modaxo (Empresa 1) on large-scale electronic ticketing and transit revenue platformsâshipping mobile apps used across multiple Brazilian cities and contributing to modernization efforts with Flutter and Java/Spring. Alongside professional work, he builds personal projects, combining product mindset with fullstack execution across mobile, backend, frontend, and cloud/devops. He is also a Software Engineering student at PUC Minas (2023â2027), continuously strengthening his engineering fundamentals while applying them in production environments and side projects with Java, Angular, PostgreSQL and Docker.
Experience
Software Engineer
05/2025 - Currently
Project Sigom Cloud
Sigom Cloud is an ERP/Transit Revenue Management, available in SaaS style. Worked as a Fullstack developer operating with Java 1.8, Spring Boot, and AngularJS. Optimized PIX payment report generation by redesigning the algorithm and reducing execution paths by 42.6%; for 1M records, reduced estimated work from 20Mâ1T to 1M operations.
Project SIGO
SIGO is a mobile app for electronic ticketing for public transport across small and large metropolitan cities around Brazil, such as Guarulhos, SP; FlorianĂłpolis, SC; UberlĂąndia, MG and many others. Worked as a Fullstack developer dealing with the technologies C# with Xamarin for the mobile app and Java 1.7 and Spring Boot 1.5. The app is available on Apple App Store and Android Google Play and it reached out over 177K people.
Project SIGO 2.0
SIGO 2.0 is a modernization of SIGO. Worked as a Fullstack developer using the technologies Dart with Flutter kit for the mobile app and Java 1.7 and Spring Boot 1.5. Worked on the following functionalities: Card Statement, FAQ, Alerts, User Registering, Profile Editing, Orders and My Cards sections and Moovit integrations with GTFS and GTFS-RT for route planning and real time lines tracking.
Skills
- Java 1.7/1.8
- Spring Boot
- AngularJS
- Flutter
- Xamarin
- C#
- Dart
Projects
Cuido Bem
09/2024 - Currently
In this role, I contribute by leading the back-end development team and participating in various projects as needed. My contributions to the 'Cuido Bem' project so far include:
- Reviewing colleagues' code and suggesting improvements;
- Writing unit tests for the MVC structure;
- Implementing a GlobalExceptionHandler to effectively manage back-end exceptions.
Skills
- Java
- Spring Boot
- Mockito
- SQL
- Git
- RestAPI
- MVC
IT Technician
09/2021 - 09/2023
ServiceDesk and HelpDesk
I configured and verified networks on desktops and laptops. Verified and installed hardware. Performed maintenance on computers and laptops. Provided L1 technical support using Active Directory, ticketing systems (CSC), VPN, directory and printer mapping platforms, following established SLA standards. Collaborated on a telephony change project serving over 100 users, migrating logical telephony networks to VOIP and configuring/installing devices.
Skills
- Service Desk
- MS Office
- User Support
- Hardware Support
- Active Directory
- Windows
Field Support Engineer
09/2023 - Currently
Service Desk (Freelance)
Provide English-language support for a multicultural user base. Diagnosed, researched, and resolved issues across desktops, laptops, VMs, smartphones, servers, backup systems, VoIP devices, and peripherals. Installed and configured devices and updated documents in a ticketing system for tracking and reporting.
Skills
- Hardware
- Server Maintenance
- User Support
Experience
Software Engineer
05/2025 - Currently
Project Sigom Cloud
Sigom Cloud is an ERP/Transit Revenue Management, available in SaaS style. Worked as a Fullstack developer operating with Java 1.8, Spring Boot, and AngularJS. Optimized PIX payment report generation by redesigning the algorithm and reducing execution paths by 42.6%; for 1M records, reduced estimated work from 20Mâ1T to 1M operations.
Project SIGO
SIGO is a mobile app for electronic ticketing for public transport across small and large metropolitan cities around Brazil, such as Guarulhos, SP; FlorianĂłpolis, SC; UberlĂąndia, MG and many others. Worked as a Fullstack developer dealing with the technologies C# with Xamarin for the mobile app and Java 1.7 and Spring Boot 1.5. The app is available on Apple App Store and Android Google Play and it reached out over 177K people.
Project SIGO 2.0
SIGO 2.0 is a modernization of SIGO. Worked as a Fullstack developer using the technologies Dart with Flutter kit for the mobile app and Java 1.7 and Spring Boot 1.5. Worked on the following functionalities: Card Statement, FAQ, Alerts, User Registering, Profile Editing, Orders and My Cards sections and Moovit integrations with GTFS and GTFS-RT for route planning and real time lines tracking.
Skills
- Java 1.7/1.8
- Spring Boot
- AngularJS
- Flutter
- Xamarin
- C#
- Dart
Projects
Cuido Bem
09/2024 - Currently
In this role, I contribute by leading the back-end development team and participating in various projects as needed. My contributions to the 'Cuido Bem' project so far include:
- Reviewing colleagues' code and suggesting improvements;
- Writing unit tests for the MVC structure;
- Implementing a GlobalExceptionHandler to effectively manage back-end exceptions.
Skills
- Java
- Spring Boot
- Mockito
- SQL
- Git
- RestAPI
- MVC
IT Technician
09/2021 - 09/2023
ServiceDesk and HelpDesk
I configured and verified networks on desktops and laptops. Verified and installed hardware. Performed maintenance on computers and laptops. Provided L1 technical support using Active Directory, ticketing systems (CSC), VPN, directory and printer mapping platforms, following established SLA standards. Collaborated on a telephony change project serving over 100 users, migrating logical telephony networks to VOIP and configuring/installing devices.
Skills
- Service Desk
- MS Office
- User Support
- Hardware Support
- Active Directory
- Windows
Field Support Engineer
09/2023 - Currently
Service Desk (Freelance)
Provide English-language support for a multicultural user base. Diagnosed, researched, and resolved issues across desktops, laptops, VMs, smartphones, servers, backup systems, VoIP devices, and peripherals. Installed and configured devices and updated documents in a ticketing system for tracking and reporting.
Skills
- Hardware
- Server Maintenance
- User Support
Featured Projects
Education
Bachelor Software Engineering
07/2023 - 07/2027
I am currently studying Software Engineering at PUC Minas, where I acquire knowledge in system development, requirements analysis, and software architecture. During my degree, I have specialized in back-end and agile development technologies.
Interdisciplinary Project Champion
Led an award-winning team in high-impact, real-world software project.
Experimental Software Agency - PMMG
As a Tech Lead, I am leading a team to build the human-resources selection process software scope for Minas Gerais State Military Police, impacting more than 40000 candidates per public tender.
Extracurricular
Technologies
Programming Languages
Frontend
Mobile & Cross-platform
Backend & Frameworks
Databases
DevOps & Cloud
Observability
Messaging & Caching
Development Tools
Github Wrapped 2024
Resume
Hobbies
âïž Chess
I love playing chess, a game that stimulates concentration, logical thinking, and strategic decision-making. Besides being fun, it helps me develop skills like problem-solving.
Spotify
I enjoy music as a whole; I'm quite eclectic. I adore Brazilian music and listen a lot to bossa nova, samba, and MPB. Besides national music, I like to listen to a bit of neo-psychedelia, indie, indie rock, jazz, and so on... I really love music!
Made with đ€ by @raphael-sena.