Stax Payments · 2 months ago
Lead Software Engineer, Mobile Platform
Orlando, FL
Full-time
Onsite
Senior Level, Lead/Staff
7+ years expStax Payments is a company focused on empowering merchants with innovative technology solutions. As the Lead Software Engineer, you will oversee the architectural vision and technical strategy for the mobile ecosystem while mentoring a talented team and developing core applications and integrations.
Financial ServicesMobile PaymentsPaymentsSoftwareTransaction Processing
Responsibilities
Architect, develop, and maintain Stax's 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
Qualification
Required
Bachelor's 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
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
Benefits
Impact: You’ll be at the heart of our mobile strategy, building technology that directly empowers merchants to run their businesses.
Growth: We're 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.
Company
Stax Payments
Stax Payments is a leading, high-growth payments technology firm specializing in integrated payments, recurring billing, and SMB processing.
201-500 employees
H1B Sponsorship
Stax Payments has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (2)
2024 (3)
2023 (1)
2022 (4)
2021 (1)
2020 (3)
Funding
Current Stage
Late StageTotal Funding
$263.25MKey Investors
Fulcrum Equity PartnersvenVelo
2022-03-08Series D· $245M
2018-07-19Series C· $10.5M
2017-10-24Series B· $5.5M
Leadership Team
Paulette Rowe
Chief Executive Officer
Mark Sundt
Chief Technology Officer
Recent News
2025-12-21
2025-11-12
2025-10-11
Company data provided by crunchbase