iOS Engineer

About the Company

Rain is the global stablecoin payments platform for enterprises, neobanks, platforms, developers, and AI agents. Our technology allows partners to move, store, and use stablecoins instantly and compliantly through global payment cards, rewards, on/offramps, wallets, and cross-border rails. As both a Visa and Mastercard Principal Member, Rain issues cards that work at more than 175 million merchant locations in over 220 countries and territories. Built natively for stablecoins and trusted by more than 100 organizations worldwide, Rain delivers secure, scalable infrastructure that makes money move freely and instantly around the world.

You will have the opportunity to deliver massive impact at a hypergrowth company backed by some of the top investors in fintech, crypto, and SaaS. In January 2026, we closed a $250M Series C led by ICONIQ, valuing Rain at $1.95B, with Sapphire Ventures, Dragonfly, Bessemer Venture Partners, Galaxy Ventures, FirstMark, Lightspeed, Norwest, and Endeavor Catalyst also participating. If you're curious, bold, and excited to help shape a borderless financial future, we'd love to talk.

Our Ethos

We believe in an open and flat structure. You will be able to grow into the role that most aligns with your goals. Our team members at all levels have the freedom to explore ideas and impact the roadmap and vision of our company.

About the Team

You'll be the lead iOS engineer at Rain, owning mobile alongside the lead Android developer from the ground up. Our partners use Rain's issuance platform and APIs to power card programs, wallets, and payment experiences for their end users, and you'll be the person who brings those experiences to life on iOS. You'll work directly with product, design, and our platform engineering team to define what great mobile looks like for Rain's clients and their customers.

What you’ll do

• Own the entire iOS development lifecycle, from architecture and implementation to App Store delivery

• Build polished, production-grade mobile apps that leverage Rain's issuance platform and APIs for clients and their end users

• Collaborate closely with product, design, and backend engineers to define the mobile roadmap and translate platform capabilities into intuitive native experiences

• Architect a clean, scalable codebase that can serve as the foundation as the mobile team grows

• Integrate with Rain's APIs for card issuance, transaction management, balance queries, and other payment flows

• Implement secure authentication, tokenization, and data handling appropriate for a financial services context

• Drive decisions on tooling, frameworks, CI/CD, and testing strategy for mobile

• Contribute to the broader engineering culture as an early team member with outsized influence on how we build

You are likely to succeed if you have:

• 4–10 years of professional mobile development experience, with multiple apps shipped to the App Store

• Proficiency in Swift and deep familiarity with Apple's frameworks (UIKit, SwiftUI, Combine, Core Data, etc.)

• Experience architecting iOS apps from scratch. You've made foundational decisions on project structure, navigation patterns, state management, and dependency injection

• Solid understanding of networking layers, RESTful API integration, and secure data handling

• A disciplined approach to code quality: you write testable code, value code review, and care about maintainability

• Comfort working autonomously with minimal direction — you'll be the mobile expert in the room

• Strong product sensibility: you think beyond tickets and advocate for great user experiences

• Excellent communication skills; you can translate technical tradeoffs for non-technical stakeholders

Bonus attributes:

• Experience in fintech, payments, or crypto/web3

• Familiarity with card issuance, wallet UX, or financial transaction flows

• Experience with WKWebView-based hybrid architectures or embedded SDK patterns

• Background in building white-label or multi-tenant mobile experiences

• Exposure to CI/CD tooling for iOS (Fastlane, Xcode Cloud, Bitrise, etc.)

• Experience being the first or early mobile hire at a startup

Things that enable a fulfilling, healthy and happy experience at Rain:

Unlimited time off 🌴 Unlimited vacation can be daunting, so we require Rainmakers to take 10 days minimum for themselves.

Flexible working ☕ We support a flexible workplace – work from home, come into an office, or both. We want everyone to work in an environment where they're their most confident and productive selves. New Rainmakers receive a stipend to set up a comfortable home workspace.

Easy to access benefits 🧠 For US Rainmakers, we cover 95% of your health, dental, and vision plan costs and 90% for your dependents, plus a 100% company-subsidized life insurance plan.

Retirement goals💡 Plan for the future with confidence. We offer a 401(k) with a 4% company match.

Equity plan 📦 Every Rainmaker gets an equity option plan so we all benefit from our success.

Health and Wellness 📚 High performance begins from within. Rainmakers receive a monthly stipend to be used for eligible health and wellness spending like gym memberships/fitness classes, massages, acupuncture - whatever recharges you!

In-office meals 🍜 Rainmakers working from the office enjoy lunch and dinner on us, covered with a DoorDash credit.

Team summits ✨ Summits play an important role at Rain. Time together helps us build relationships and a common destiny. Expect team and company offsites, both domestic and international.