Senior Reverse Engineer - Mobile / iOS

Job Description

Visa’s Technology Organization is a community of problem solvers and innovators reshaping the future of commerce.   We operate the world’s most sophisticated processing networks capable of handling more than 65k secure transactions a second across 80M merchants, 15k Financial Institutions, and billions of everyday people.   While working with us you’ll get to work on complex distributed systems and solve massive scale problems centered on new payment flows, business and data solutions, cyber security, and B2C platforms.

The Opportunity

We are looking for talented, curious, and energetic Software Engineers who embrace solving complex challenges on a global scale.  As a Visa Software Engineer, you will be an integral part of a cross-functional development team inventing, designing, building, and testing software products that reach a truly global customer base. While building components of cutting-edge payment technology, you will get to see your efforts shaping the digital future of monetary transactions.

The Work itself

• Design code and systems that touch 40% of the world population while influencing Visa’s internal standards for scalability, security, and reusability

• Collaborate cross-functionally to create design artifacts and develop best-in-class software solutions for multiple Visa technical offerings

• Actively contribute to product quality improvements, value added service technology, and new business flows in diverse agile squads

• Develop robust and scalable products intended for a myriad of customers including end-user merchants, b2b, and business to government solutions

• Leverage innovative technologies to build the next generation of Payment Services, Transaction Platforms, Real-Time Payments, and Buy Now Pay Later Technology

• Opportunities to make a difference on a global or local scale through mentorship and continued learning opportunities

Specific Requirements

• Maintain and troubleshoot iOS-based RE connections, primarily in jailbroken environments.

• Use and enhance internal RE toolkit and external tools (e.g., palera1n for jailbreaks, frida for bypassing security, Charles Proxy for traffic analysis).

• Reverse engineer iOS apps using interactive disassemblers (HexRays IDA, Ghidra, Hopper), injector tools (frida.re), and traffic proxies (Charles Proxy, Wireshark).

• Collaborate cross-functionally to document knowledge and improve workflows.

• Proactively detect, diagnose, and resolve disruptions in RE connections, often under time pressure and with limited documentation.

• Contribute to compliance with internal audits and security standards.

Essential Functions

• Works alongside others to implement modifications to existing software code that complies with design specifications and meets security best practices.

• Assists with improvements to systems and tools and supports development and implementation of new automation, asking questions as necessary.

• Engages with team members and manager during code/design reviews, participates in on-call rotations and incident responses throughout product development and operations cycles.

• Leverages working knowledge of systems/platforms and telemetry analyses to identify basic issues in code, processes, and designs when they are inconsistent with customer/business objectives.

• Leverage expertise in iOS reverse engineering and telemetry analysis to identify and resolve issues in code, processes, and designs.

• Mentor and support less experienced engineers, contributing to a culture of learning and operational excellence.

This is a hybrid position. Expectation of days in office will be confirmed by your hiring manager.

Qualifications

Basic Qualifications

• Master’s degree in Computer Science, Engineering, Information Systems, or related field, OR Bachelor’s degree in a related field and directly related experience.

Preferred Qualifications

• Knowledge of and ability to develop back-end (e.g. Python, Java, C++, PHP) code in support of package and product development. This includes the extension of capabilities of packages and products.
• The ability to develop and utilize Application Program Interfaces (APIs), a set of routines, protocols, and tools for building software applications that specify how software components should interact and are used when programming graphical user interface (GUI) components. An API may be for a web-based system, operating system, database system, computer hardware, or software library.
• Knowledge of and the ability to use database software (e.g., applications, web-based applications, information systems) to maintain, modify, and output data.
• Knowledge of systems integration process in which separately produced components or subsystems are combined and problems in their interactions are addressed.
• Knowledge of data structures, which consist of data organization, management, and storage formats that enable efficient access and modifications. This includes a collection of data values, the relationships among them, and the functions or operations that can be applied to the data.

The Skills You Bring

• Energy and Experience: A growth mindset, curiosity, and passion for reverse engineering and security.
• Challenge the Status Quo: Comfort in “hacking” beyond traditional solutions, especially in undocumented or rapidly changing environments.
• Technical Expertise: Proven experience with iOS reverse engineering, jailbroken devices, and tools such as HexRays IDA, Ghidra, Hopper, frida.re, Charles Proxy, and Wireshark.
• Programming: Strong skills in Java, Swift, Objective-C, and experience with AWS, Kubernetes, Docker, and Datadog.
• Builder: Experience building and deploying modern services, with a focus on quality, scalability, and operational resilience.
• Learner: Constant drive to learn new technologies and adapt to evolving technical and regulatory landscapes.
• Partnership: Experience collaborating with cross-functional teams, including Product, Test, DevOps, and Agile/Scrum teams.
• Communication: Strong documentation, mentoring, and communication skills.

Additional Information

Visa is an EEO Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status. Visa will also consider for employment qualified applicants with criminal histories in a manner consistent with EEOC guidelines and applicable local law.