Mobile Software Engineer

Location: Cincinnati, OH or USA

As a Mobile Software Engineer at LISNR, you’ll architect, build, and maintain high-quality, secure iOS and Android SDKs and applications that drive our B2B Fintech platform. You’ll partner with product managers, designers and fellow engineers to translate requirements into scalable mobile solutions, leveraging your deep technical expertise and data-driven mindset.

The Mobile Software Engineer will leverage deep expertise in native iOS (Objective-C, Swift) and Android (Java, C++) development to architect, build, and maintain secure, high-performance B2B Fintech SDKs and applications. The ideal candidate combines:

• Mobile Mastery: 3+ years of hands-on experience designing and shipping fully native iOS and Android SDKs or apps, with an unwavering focus on UX, performance optimization, and platform best practices.
• Fintech Savvy: Prior work on payment, security-critical, or compliance-driven applications, with a solid understanding of encryption and data protection in mobile contexts.
• Leadership & Collaboration: Proven ability to partner with product managers, designers, QA, and engineering leadership to translate complex requirements into scalable, maintainable architectures.
• Data–Driven Approach: A track record of instrumenting analytics to drive feature prioritization, UX refinements, and performance improvements based on real user metrics.

In this role, you’ll own the end-to-end mobile experience for our Fintech customers—applying your deep mobile skill set to deliver elegant, reliable products that move the business forward.

About LISNR

Today’s customer expects seamless, secure, and context-aware interactions—anytime, anywhere. LISNR® helps brands deliver on that expectation by powering proximity engagement that works without dependence on hardware, connectivity, or QR codes. With millions of transmissions in over 100 countries, LISNR’s ultrasonic SDK (Radius®) and gamified consumer engagement platform (Quest) allow businesses to recognize presence, personalize experiences, and process transactions in real-time. From mobility and retail to fintech and hospitality, LISNR bridges the gap between digital and physical with proximity-first experiences that drive loyalty, revenue, and trust. For more information, visit LISNR.com.

Job Responsibilities

• Collaborate with product, design and project teams to define and evaluate mobile-specific solutions
• Design, implement, test and maintain our iOS and Android SDKs and sample applications
• Produce and maintain Technical Design Documents and API reference guides for mobile platforms
• Develop and automate end-to-end tests and UI-level test suites for mobile components
• Participate in design and code reviews focused on mobile architecture, performance and best practices
• Integrate audio and signal-processing pipelines into native mobile frameworks (Objective-C/Swift, Java/C++)
• Troubleshoot, profile and optimize mobile performance, memory usage and battery impact
• Keep abreast of emerging mobile technologies, development tools and platform guidelines
• Draft and update technical documentation for internal teams and external partners
• Provide feedback on development processes, CI/CD pipelines and mobile release strategies
• Partner cross-functionally with UX designers, QA engineers and product managers to deliver elegant mobile experiences

Required Qualifications:

• Bachelor’s Degree in Computer Science, Computer Engineering or related field
• 3+ years of native mobile application or SDK development on iOS and/or Android
• Proficiency in Objective-C and Swift (iOS) and Java (or Kotlin) and C++ (Android)
• Experience with developing modules in React-Native
• Experience with Android NDK or hybrid mobile frameworks
• Solid understanding of Agile methodology and requirements analysis
• Excellent communication skills and ability to manage shifting priorities

Preferred Qualifications:

• C++14 development experience for mobile or embedded contexts
• Experience with other mobile development frameworks, such as Flutter, Ionic, Xamarin, etc.
• Familiarity with CMake, Gradle or other mobile build systems
• Experience with version control software, preferably Gitlab
• Experience with audio SDKs, DSP or real-time signal processing
• Hands-on with cloud services (AWS, GCP) for mobile backend integrations
• Knowledge of cryptography, secure networking and sockets on mobile

BENEFITS:

• Remote Work Options
• Health, Vision, Dental Insurance Options
• Unlimited PTO after 90 days of employment
• Equity Opportunities
• And More!

We reserve the right to change or modify job duties and assignments at any time. The above job description is not all encompassing. Position functions and qualifications may vary depending on business necessity.