Lead Software Engineer, Mobile Platform

As our Lead Software Engineer you will own the architectural vision and technical strategy for the entire Stax mobile ecosystem. This is a hands-on role for a leader passionate about user experience and cutting-edge technology. You will not only develop our core apps SDKs and device integrations but also mentor a talented team empowering them to build solutions that are critical to our business goals.

Key Responsibilities & Objectives

• Architect develop and maintain Staxs core mobile product offerings including the Stax Pay apps (iOS/Android) public-facing payment SDKs (Kotlin/Swift) and payment terminal integrations.
• Act as the key technical partner for product teams to architect and deliver new features across our mobile card reader and terminal platforms.
• Drive integrations with Android-based hardware devices and ensure seamless performance across environments.
• Enhance and support mobile-centric technologies including tokenization scripts backend services and terminal customizations.
• Define and champion the coding standards architectural patterns and best practices that ensure quality and consistency across all mobile development.
• Mentor and guide engineers across teams on mobile platform technologies and SDK usage.
• Maintain and continuously improve developer documentation for SDKs and integrations.
• Translate business requirements into technical specifications collaborating with product managers and external partners to define roadmaps and ensure alignment.
• Own the end-to-end mobile app distribution process from publishing and updates to managing all interactions with the Apple App Store and Google Play Store review teams.

• Bachelors degree in Computer Science or equivalent practical experience.
• 7 years of professional mobile development with deep expertise in Android (Kotlin) or iOS (Swift) and strong proficiency in the other.
• 3 years of experience working on a mobile product that served at least tens of thousands of weekly active users.
• A minimum of 2 years in a technical leadership role (e.g. Project Lead Senior Engineer with mentorship duties) overseeing complex multi-layered mobile projects.
• Experience leading or mentoring teams in SDK and mobile platform development.
• Track record of managing widely distributed SDKs with versioning backward compatibility and developer adoption in mind.
• Familiarity with mobile app distribution processes and review team interactions for both Apple App Store and Google Play Store.
• Experience managing platform-specific capabilities that cross-platform frameworks cannot fully support such as Bluetooth permissions networking background services push notifications and secure storage.
• Strong expertise with at least one mobile package manager (e.g. Cocoapods for iOS or Maven Central/Gradle for Android) to support SDK commercialization and distribution.
• Proven ability to foster a collaborative and supportive team environment through empathetic leadership mentorship and constructive feedback as demonstrated by professional references from former colleagues.
• Strong problem-solving skills and demonstrated ability to work across diverse technologies.

Preferred Qualifications

• Experience integrating with Android-based payment terminals (e.g. Dejavoo Verifone).
• Background in FinTech or payments technology.
• Familiarity with Cocoapods CI/CD pipelines (Gradle Fastlane) and Firebase (e.g. push notifications).
• Familiarity with mobile testing frameworks and developer experience tooling.
• 2 years of experience with frontend or backend JavaScript/TypeScript applications.

Why Youll Love Working at Stax

• Impact: Youll be at the heart of our mobile strategy building technology that directly empowers merchants to run their businesses. This is a highly impactful and meaningful domain as our product is core to the day-to-day operations of our users.
• Growth: Were committed to your professional development with opportunities to learn new technologies and take on greater leadership responsibilities.
• Culture: Join a collaborative innovative and supportive team that values curiosity and a passion for building great software.