Senior Mobile Software Engineer (Flutter, Native)

TL;DR

Senior Mobile Software Engineer (Flutter, Native): Building and maintaining core mobile application infrastructure for a large digital financial platform with an accent on app performance, infrastructure scalability, and removing legacy dependencies. Focus on providing user-friendly, scalable, high-performing, and cost-efficient app infrastructure components and mobile tools for engineers.

Location: Hybrid (2-3 times/week) in Brazil (Belo Horizonte, Campinas, Rio de Janeiro, Sao Paulo)

Company

Nu is one of the largest digital financial platforms in the world, with more than 122 million customers across Brazil, Mexico, and Colombia.

What you will do

• Work across Native, Flutter, and related frameworks to build app infrastructure.
• Maintain the core infrastructure of the mobile application.
• Optimize app performance and enable product teams to deliver high-quality mobile experiences.
• Focus on app performance, infrastructure scalability, and the removal of legacy dependencies.
• Provide user-friendly, scalable, high-performing, and cost-efficient app infrastructure components.
• Enable hirify.global engineers to quickly and safely test, deploy, monitor, analyze, and improve app flows and features.

Requirements

• Proven experience in senior-level technical mobile development.
• Strong technical background with Flutter and/or native mobile development (Android/iOS).
• Solid understanding of mobile software engineering principles, architectural patterns, and modularization strategies.
• Experience with performance optimization, dependency injection, and migration of core systems.
• Knowledge of mobile observability, monitoring, and debugging tools.
• Strong communication skills in English.

Nice to have

• Experience with backend technologies integrated with mobile applications.
• Familiarity with distributed systems and large-scale app architecture.
• Contributions to internal SDKs, libraries, or mobile design systems.
• Understanding of user authentication, session management, and app state handling.

Culture & Benefits

• Help shape the mobile experience for millions of customers across multiple countries.
• Influence the architecture and foundational technologies for hirify.global engineers.
• Work in a dynamic, collaborative environment valuing experimentation and continuous improvement.
• Opportunity to earn equity at hirify.global.
• Comprehensive benefits including Food/Meal Card, Public Transportation Commuting Benefit, and NuCare Assistance Program.
• Medical Plan, Dental Plan, Extended Parental Leave, and Daycare Allowance.