# Mobile Developer (Swift and React Native)

> 99x Brazil (formerly Nextly) · São Paulo, Brazil (Remote) · Full-time · Posted 2026-07-08

**Workplace:** remote

## Description

We're hiring a mobile developer to help our client scale. As one of three founding engineers on a new team, you'll develop features end-to-end, own the app's architecture, and shape the decisions that drive our growth. You'll touch every part of the stack and ship from day one.

Tech stack: iOS and Android apps built natively in Swift and Kotlin plus React Native, with an Elixir backend.

### Responsibilities

-   Produce fully functional mobile applications writing clean code
-   Gather specific requirements and suggest solutions
-   Troubleshoot and debug to optimize performance
-   Design interfaces to improve user experience
-   Liaise with Product development team to plan new features
-   Ensure new and legacy applications meet quality standards
-   Research and suggest new mobile products, applications and protocols

## Requirements

-   Advanced/Business English speaking and writing skills;
-   6+ years of experience in mobile application development
-   Experience owning mobile application architecture and contributing to senior technical decision-making in a scaling product environment
-   Proficient in native iOS development (Swift), native Android development (Kotlin), and React Native
-   Experience with SwiftUI and UIKit
-   Experience with composable architecture
-   Experience working with Elixir in production environments
-   Experience with consumer mobile applications
-   Experience collaborating closely with product, designers, and other engineers, and helping shape technical decisions with leadership
-   Available to work mostly during Brazil time zone business hours
-   Experience with SaaS products is a plus.
-   BSc degree in Computer Science or relevant field is a plus.

## Benefits

-   Your pick when it comes to employment models: CLT/PJ/Cooperativa;
-   We provide resources for you to grow and learn on the job, including online courses, mentoring, and the latest gen laptops;
-   A fully remote work environment with flexible working hours;
-   Bonus for any referrals that we end up hiring;

## Apply

[Apply at 99x Brazil (formerly Nextly)](https://apply.workable.com/99xbrazil/j/001CF8AAC2/apply)

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