Principal Mobile Engineer - Payments & Cashier

Hard Rock Digital•United States, FL

6d•Hybrid

About The Position

Hard Rock Digital is building a team focused on becoming the best online sportsbook, casino, and social gaming company in the world. We are seeking a Principal Mobile Engineer to own the frontend technical direction of the Payments & Cashier domain within our high-performance React Native app for iOS and Android. This role involves close collaboration with Product Management, Design, QA, Backend Engineering, and Compliance and Data partners to deliver a fast, trustworthy, and compliant cashier experience for millions of players. This is a hands-on technical leadership role where you will set the strategic technical direction for Payments on mobile, multiply the engineers around you, and help shape the platform's future.

Requirements

10+ years developing mobile applications (native and hybrid), with at least 7 years focused on React Native.
Bachelor’s degree in Computer Science or a related field, or equivalent demonstrated experience.
Deep expertise in React Native architecture using TypeScript in strict mode, with a track record of defining patterns and conventions adopted across engineering teams.
Mastery of dual state-management strategies — client state (MobX) and server state (TanStack React Query) — including the judgment to enforce clear boundaries between them at scale.
Hands-on experience building with AI — beyond usage. A demonstrated track record of using AI-assisted tools (e.g., Cursor, Claude Code, Codex) as a core part of your daily workflow and of authoring agentic workflows and reusable AI skills/agents for a team — defining the conventions, guardrails, and evals that let others adopt them safely at scale.
Proven experience designing real-time mobile systems using RESTful services, WebSockets, and GraphQL, with an emphasis on resilience, latency, and graceful degradation.
Significant native iOS (Swift/Objective-C) and/or Android (Kotlin/Java) experience, particularly authoring and maintaining native module bridges and managing cross-boundary data flow — valuable for payment SDKs and secure native integrations.
Prior experience in payments/fintech, igaming, sportsbook, or online gaming, with a strong understanding of the regulatory, compliance, PCI, and geolocation constraints that shape product and architecture decisions — ideally including payment-provider integrations, deposit/withdrawal flows, and money-movement edge cases.
Experience architecting multi-variant mobile applications — divergent product configurations, jurisdiction-specific logic, and feature-flag-driven rollouts (e.g., LaunchDarkly) within a single codebase.
Ownership of cross-cutting technical initiatives such as design-system creation, legacy migration strategies, developer tooling, or CI/CD pipeline optimization for App Store and Play Store delivery.
Comprehensive knowledge of the mobile development lifecycle — application architecture, OS-level APIs, debugging, performance profiling, security hardening, and deployment — with the ability to set org-wide standards in each area.
Demonstrated ability to identify, scope, and drive multi-quarter architectural improvements, balancing long-term technical vision against near-term product delivery.
A track record of mentoring senior and staff engineers, elevating team capabilities through code-review culture, technical documentation, and architectural guidance.
Strong cross-functional influence — able to partner with Product, Design, QA, Backend, Compliance, and Data leadership to shape roadmaps and make build-vs-buy-vs-migrate decisions, and to communicate confidently with senior management.
A contagious and positive work ethic that raises the bar for engineering quality across the organization, not just the immediate team.

Nice To Haves

Experience applying AI in a regulated or high-stakes domain is a strong plus.
Ideally including payment-provider integrations, deposit/withdrawal flows, and money-movement edge cases.

Responsibilities

Lead the frontend technical direction of the Payments & Cashier domain, owning architectural decisions for deposits, withdrawals, payment-option management, wallet/balance display, and transaction history, while ensuring alignment with the broader mobile platform.
Own the architecture and evolution of Cashier-domain features within a high-performance React Native application for iOS and Android, serving tens of thousands of daily users across multiple product variants and regulatory jurisdictions.
Partner with peer Principal Engineers in Core, Casino, and Sportsbook units and the Technical Director for Mobile to define, evolve, and uphold shared engineering standards, patterns, and conventions.
Champion AI-agentic development — building, not just adopting. Design, build, and maintain agentic AI workflows, custom agents, and reusable AI skills for the Payments mobile team; define the conventions, guardrails, and evaluations that make AI safe and effective in a money-movement context; integrate AI across the SDLC (requirements → implementation → review → release) and drive measurable gains in productivity, quality, and developer experience.
Drive multi-quarter technical initiatives — payment-provider integrations, legacy migration, platform modernization, design-system adoption, and build-infrastructure improvements — coordinating execution across units.
Navigate a highly regulated, money-movement domain — ensuring compliance, security, and stability (PCI-adjacent handling, geolocation, KYC and responsible-gaming touchpoints) while minimizing the architectural cost of jurisdiction-specific requirements.
Serve as the escalation point for complex technical problems in the Cashier unit — leading troubleshooting, finding root causes quickly, and turning incidents into systemic improvements.
Champion comprehensive observability — analytics, error reporting, and performance monitoring for payment flows — and use data to drive architectural and product decisions.
Partner with Product, Design, QA, Backend, Compliance, and Data/Reporting to shape roadmaps, inform feasibility, and make build-vs-buy-vs-migrate decisions — including honoring data contracts so cashier changes don’t break downstream reporting or compliance.
Mentor and develop senior and staff engineers through architectural guidance, code-review culture, and hands-on pairing on complex problems.
Contribute to cross-unit technical forums, representing Payments engineering priorities and collaborating on platform-wide decisions.
Cultivate a positive engineering culture that values quality, pragmatism, and continuous improvement.