Senior iOS Developer

Paybis is a global fintech company in the crypto and payments space, founded in 2014. As of 2026: 6.8M+ users, 180+ countries, $5B+ in lifetime transaction volume, $2B in volume in 2025 alone (+266% YoY). Recognised as Best Crypto Payments Provider at AIBC Awards Dubai 2026. Self-funded, profitable.

Mobile is our primary growth channel. We are building a native iOS/Android app as the core user-facing product — and we are hiring a Senior iOS Developer to join the team.

You will work on a native iOS application that processes real financial transactions for real users. You will take full ownership of features end-to-end — from architecture decisions to production release — and contribute to the quality and reliability of the iOS codebase as a whole.

Security, reliability, and code quality are non-negotiable — not aspirational.

• Design, develop and ship production-ready iOS features using Swift — UIKit and SwiftUI in production
• Make and defend architectural decisions within your scope — MVVM / Clean Architecture / VIPER: know when to use what and why
• Build and maintain iOS CI/CD pipelines: Fastlane, Xcode Cloud, or GitLab CI
• Contribute to App Store lifecycle: provisioning, TestFlight, submission, App Review
• Write clean, performant, testable Swift code — uphold code quality standards in review
• Implement mobile security requirements: Keychain, Secure Enclave, biometric auth, certificate pinning, jailbreak detection
• Collaborate with Backend, Product, Design, and QA — represent iOS in cross-team conversations
• Create technical documentation for iOS components you own
• Participate in sprint planning, product design sessions, and roadmap discussions

Must have:

• 4+ years of commercial iOS development in Swift
• Deep UIKit command — custom components, complex layouts, performance optimisation
• Solid SwiftUI production experience — real screens shipped, not prototypes
• Good command of architectural patterns: MVVM, VIPER, Clean Architecture — knows when to use which
• Swift Concurrency (async/await) and Combine — used in production
• Memory management: solid ARC understanding, can find and fix retain cycles and memory leaks
• REST API integration: URLSession/Alamofire, error handling, retry logic, token refresh
• Mobile security: Keychain, Secure Enclave, biometric auth, certificate pinning, jailbreak detection
• iOS CI/CD: Fastlane, Xcode Cloud or GitLab CI — has worked with pipelines
• App Store lifecycle: provisioning, TestFlight, App Review — end-to-end experience
• Testing: XCTest unit and UI tests — writes testable code
• English B2+ — PRs, tickets, async communication
• Ownership mindset — drives tasks to completion without micromanagement

Nice to have:

• Experience in fintech, crypto, payments or banking mobile apps
• KYC SDK integration (Sumsub, Onfido or similar)
• Payment SDK integration at iOS level (Checkout.com, Stripe, etc.)
• Real-time data: WebSocket or SSE for live crypto prices or order status
• Firebase suite: Analytics, Crashlytics, Remote Config, A/B testing
• Performance profiling with Instruments
• SwiftLint or other static analysis tooling
• Familiarity with modular iOS architecture (Swift Packages, feature modules)
• AI tools in daily development (GitHub Copilot, Cursor, etc.)

Swift · UIKit · SwiftUI · Swift Concurrency (async/await) · Combine · MVVM / VIPER / Clean Architecture · XCTest · Fastlane / GitLab CI/CD · Keychain · Secure Enclave · REST · WebSocket · KYC SDK integration

First 30 days — Onboarded into the codebase and team processes. First features in development. Understand team architecture and stack.

First 90 days — Shipping features independently. Actively contributing to code review and technical discussions. Trusted member of the iOS team.

First 6 months — Consistent delivery of high-quality production features. Proactively identifies and improves areas of the codebase. Acts as a reliable technical contributor in cross-functional discussions.

1. Technical interview
2. Cultural fit interview with HRD
3. Final interview with Engineering leadership

• Ownership of features end-to-end — from architecture to production
• Real product at scale: 6.9M users, $5B+ lifetime volume — your code runs in production
• Product company, not an agency — you own what you build, end to end
• Modern, clean stack: Swift, SwiftUI, native iOS — no Objective-C legacy
• Fintech + crypto domain: technically challenging, non-trivial security and UX challenges
• Remote-first, high autonomy, minimal micromanagement
• Self-funded, stable company — no investor pressure

• Fast pace and shifting priorities — adaptability is not optional
• High bar for quality, security, and reliability — real user money is at stake
• Compliance constraints shape some engineering decisions

Paybis is an equal opportunity employer. We welcome engineers who write clean Swift every day and take ownership seriously.