Senior Mobile Software Engineer

Summary

Join RecargaPay, a leading digital ecosystem in Brazil, and make an impact on millions of users. As a Senior Mobile Software Engineer, you will play a pivotal role in developing and maintaining high-quality mobile applications, focusing on security-critical features. You will work with React Native, Android (Java/Kotlin), and iOS (Objective-C/Swift), utilizing AI-powered tools to enhance productivity. You will lead architecture decisions, mentor other engineers, and collaborate with cross-functional teams. This role requires strong experience in mobile development, security practices, and AI tools. RecargaPay offers a competitive salary, remote work, and various benefits.

Requirements

• Academic background in computer science, engineering, or software development disciplines
• Strong experience developing mobile applications in React Native, and also in native Android/iOS development
• Demonstrated ability to take ownership of mobile projects from architecture to release
• Experience solving real-world technical challenges with critical thinking and balanced trade-offs
• Active interest and practical experience applying AI tools to enhance workflows, problem-solving, and decision-making
• Familiarity with React Native architectures, Push Notifications, Deeplinks, and Middlewares
• Solid judgment navigating ambiguity, with the ability to adapt to short-term needs without compromising long-term quality
• Critical thinking: capable of understanding the “why” behind problems, identifying root causes, and articulating solutions clearly
• Initiative & ownership: comfortable identifying opportunities for improvement, taking responsibility for tasks, and driving them to completion without waiting for assignments
• Strong communication and collaboration skills, with the ability to work closely with cross-functional teams including Chapters, UX and Backend Engineering
• Pragmatic mindset that balances quality, speed, and business needs effectively
• Demonstrates alignment with company values through initiative, quality delivery, adaptability, and innovation

Responsibilities

• Develop and maintain mobile features in React Native, using strongly typed logic with TypeScript
• Actively use AI-powered tools (e.g., Copilot, ChatGPT) to improve productivity, quality, debugging, testing, and documentation
• Build and support native modules for Android (Java/Kotlin) and iOS (Objective-C/Swift), including third-party SDK integrations exposed to the React Native layer
• Lead architecture and decision-making across mobile features related to security, authentication, identity, and regulatory compliance
• Mentor and support other engineers, fostering a collaborative environment through knowledge sharing, constructive feedback, and clear communication
• Collaborate closely with backend, product, and design teams to ship high-impact, secure mobile experiences
• Apply concepts of TDD, BDD, and BFF, and use state management libraries, preferably Redux
• Debug and monitor applications using tools like Crashlytics, Firebase, Amplitude and New Relic
• Proactively detect problems, analyze root causes, and propose solutions
• Implement and maintain advanced mobile security practices including SSL pinning, secure storage, code obfuscation, anti-tampering, and device integrity

Preferred Qualifications

• We value practical experience in user identity and security flows within regulated or trust-sensitive environments, particularly in the context of mobile applications
• User authentication mechanisms such as PIN, biometrics (Face ID, fingerprint), and multi-factor authentication
• Secure onboarding flows that comply with KYC (Know Your Customer) and AML (Anti-Money Laundering) regulations, including identity document verification and selfie-based validation
• Integration of device fingerprinting SDKs to uniquely identify devices, detect rooted/jailbroken environments, and support risk-based decisions during authentication or account recovery
• Device integrity checks, secure local storage, and privacy-aware handling of sensitive user information (e.g., encryption at rest, secure keychains, biometric prompts)
• Hands-on involvement with identity verification flows using third-party SDKs, such as those powered by FaceTec, including UX orchestration, session lifecycle, error handling, and fallback strategies
• Navigating compliance requirements like GDPR, LGPD, or PCI-DSS, and translating them into seamless and secure mobile user experiences

Benefits

• Competitive and market-aligned salary
• Remote work — wherever you are, you’re part of the team!
• Home office allowance through a monthly deposit in the RecargaPay app
• Health and dental plans with no co-pay
• Life insurance
• Flexible meal allowance (via Flash)
• TotalPass membership to take care of your health
• Spanish or Portuguese classes