Senior Software Engineer - Mobile

About Nu

Nu serves more than 140 million customers, guided by a mission to fight complexity and empower people. The company has been leading an industry transformation through innovative products and human-centered services.

Proprietary technology and data at scale power Nu’s digital platform, built to promote financial access, advancement, and transparency. Its business model thrives on customer love and lower costs, feeding a flywheel of growth and profitability.

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About Nubank’s Mobile Platform

The Mobile Platform’s mission aligns with Nubank’s commitment to delivering the best experience for our customers by ensuring a high-performing, stable, and seamless app.

Within Mobile Platform, App Core 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.

App Core is at the heart of the Nubank app’s foundation, powering app performance, infrastructure scalability, and the removal of legacy dependencies to allow our application to grow from millions to potentially billions of fanatic customers.

The Opportunity

This role will involve working across a variety of technologies, including Native, Flutter, and related frameworks. We are looking for a 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 our performance, and enabling product teams to deliver high-quality mobile experiences.

What We’re Looking For

Must Have:

• 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 engineering, 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

• Relocation Assistance Package, if applicable

Work Model for this Role

Hybrid 2-3 times/week: Our hybrid work model brings us to the office at least twice a week, on strategic days designed to maximize team connection and collaboration. For more details, visit https://building.nubank.com/nu-hybrid-work-model/

Our recruitment process may involve the use of artificial intelligence-enabled tools, such as automated interview transcription and analysis, to support the evaluation process. Artificial intelligence is not used to make final hiring decisions; all decisions are made by human reviewers.

To maintain a consistent and fair process for every candidate, Nu does not provide individualized technical feedback. See how our policy works here