Visionary Mobile Application Specialist

Nubank's Mobile Platform and App Core aims to deliver exceptional customer experiences by ensuring high-performing, stable, and seamless apps.

The App Core team focuses on providing user-friendly, scalable, high-performing, and cost-efficient app infrastructure components and mobile tools that enable Nubank engineers to quickly and safely test, deploy, monitor, analyze, and improve app flows and features.

The App Core is at the heart of the Nubank app's foundation, powering app performance, infrastructure scalability, and removing legacy dependencies to enable our application to grow from millions to potentially billions of users.

This role involves working across various technologies, including Native, Flutter, and related frameworks. We are looking for a Senior Mobile Engineer with solid experience to join the App Core team—a cross-impact engineering team responsible for building and maintaining the core infrastructure of the mobile application, optimizing performance, and enabling product teams to deliver high-quality mobile experiences.

Responsibilities

• Design and implement efficient and scalable mobile software solutions.
• Develop and maintain high-quality mobile applications using Native and Flutter frameworks.
• Collaborate with cross-functional teams to identify and prioritize project requirements.
• Conduct code reviews and ensure adherence to coding standards and best practices.
• Participate in continuous improvement initiatives to enhance processes and tools.
• Provide technical guidance and mentorship to junior engineers.

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, with the ability to explain complex concepts to diverse audiences.
• Track record of delivering results in ambiguous, fast-paced environments.

Nice to Have

• Experience with backend technologies, especially those 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.

Why Join Us

• Impact at Scale: Help shape the mobile experience for millions of customers across multiple countries, with the goal of reaching billions.
• Technical Leadership: Influence the architecture and foundational technologies that all Nubank engineers rely on.
• Innovation-Driven Culture: Work in a dynamic, collaborative environment that values experimentation, continuous improvement, and engineering excellence.
• Career Growth: Develop as a strategic engineer, working on complex technical and organizational challenges.

Our Benefits

• Chance of earning equity at Nubank
• Food/Meal Card (Vale-Refeição and/or Vale Alimentação)
• Public Transportation Commuting Benefit (Vale-Transporte)
• NuCare – Psychological, Financial and Legal Assistance Program
• Life Insurance
• Medical Plan
• Dental Plan
• NuLanguage – Language Course Program
• Nucleo - Our learning platform of courses
• Extended Parental Leave
• Daycare Allowance
• Parental Consultancy
• Work-from-home Allowance
• Gym Partnerships
• 30 days of paid vacation