Agnaldo Junior

Software Engineer shifting from mobile to backend engineering 🔧⚙️

I'm a Senior Software Engineer at Trainline, working on the mobile apps people use to book and manage rail travel across the UK and Europe. Mostly React Native, ticketing flows, and native location services. Before Trainline, I led the Angular-to-React migration of the e-commerce platform at Brazil's largest pharmacy chain. I've also built and shipped my own mobile app, ReadCircle. I'm currently moving into backend engineering and looking for my first role focused on it.

Blog

Mar 30, 2026

ReadCircle: The App Is Out

Aug 22, 2025

ReadCircle: The Reading Habit App Built Around Accountability

Projects

iOS App

ReadCircle

ReadCircle isn't a book tracker or library organizer, other apps already do that well. It's for reading with friends: create a circle, post your reading updates, and see everyone else's. When people you know are reading, you read too. Keep your streak and don't fall behind, even one page a day counts. Most reading apps help you organize books. ReadCircle helps you actually read more.