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Rafael Casimiro

@rafaelcasimiro

Full-stack developer at Transwhite who developed Next.js platforms, mobile app features, and secure role-based access systems.

Portugal

Message

At Transwhite - Transportes, Unipessoal Lda., I developed and maintained Next.js platforms with tRPC and API endpoints, and implemented custom role-based access control. I also added internationalization support and automated background processes with Express.js cron jobs.

On the Paddy Paper mobile app project, I used Expo and React Native alongside Next.js to support interactive treasure-hunt challenges, location-based tasks, and offline storage. My work has also included a real-time Zigbee button system for an auction platform and a workshop inventory app built with Expo and React Native.

Experience

Work history, roles, and key accomplishments

Lead Software Developer

Transwhite - Transportes, Unipessoal Lda

May 2024 - May 2025 (1 year)

As a Solo Full Stack Software Developer and System Administrator at Transwhite, I play a key role in building scalable software solutions while ensuring the stability and security of our infrastructure. My responsibilities span backend and frontend development, mobile app enhancements, database administration, and server management.

Key Responsibilities & Achievements:
- Backend & API Development

Frontend Developer

RW Interactive

Jul 2023 - Aug 2023 (1 month)

- Developed a player management platform using React and Vite, enabling efficient tracking of player profiles, performance data, and team management functionalities.
- Designed and implemented a modern, high-performance frontend architecture, leveraging Vite for fast build times and optimized loading speeds.
- Built reusable React components and modular UI elements, ensuring a scalable and maintai

Full Stack Developer

SAFETYCODE

May 2022 - Sep 2022 (4 months)

- Zigbee Button Integration for Auction Platform: Led the development of a real-time Zigbee-based button system for an auction platform, allowing users to place bids instantly with physical button presses. Designed and implemented the communication layer between Zigbee devices and the platform, ensuring low-latency bid processing: optimized data handling and WebSocket connections for seamless real