Shift4 · 1 day ago
Senior iOS Developer
Atlanta, GA
Full-time
Onsite
Senior Level
5+ years expShift4 is boldly redefining commerce by simplifying complex payments ecosystems across the world. They are seeking a Senior iOS Developer to design, develop, and maintain high-quality mobile features while mentoring junior engineers and driving modernization efforts in their iOS codebase.
FinanceFinancial ServicesPayments
Responsibilities
Build and ship high-quality iOS features using Swift, Objective-C and the modern iOS ecosystem, resolve complex issues, and uphold engineering best practices and coding standards
Partner with tech leads and engineering leadership to define and evolve the iOS architecture, ensuring scalability, performance, and maintainability
Diagnose and resolve production issues in collaboration with backend and DevOps teams, providing Level 3 support for critical iOS incidents when needed
Become a domain expert in key areas of the iOS platform and drive technical debt reduction, refactoring, and modernization efforts (e.g., SwiftUI adoption, modularization, performance optimization)
Work closely with product managers, designers, backend engineers, and QA to deeply understand requirements, deliver pixel-perfect experiences, and align with business goals
Mentor junior and mid-level iOS engineers, conduct code reviews, and foster their technical growth within the team
Continuously improve engineering processes, CI/CD pipelines, testing strategies, and iOS development best practices
Qualification
Required
5+ years of professional iOS development experience and a total of at least 8+ years of experience as a Software Engineer
4+ years of deep expertise in Swift and Objective-C is required
Proven track record of leading complex feature development and architectural improvements on large-scale iOS codebases
Mastery of Swift and modern iOS frameworks (SwiftUI, Combine, Async/Await)
Strong experience with UIKit, SQLite and networking layers (URLSession, Alamofire, etc.)
Expertise in iOS architecture patterns (MVVM, Clean Architecture, VIPER, or modular design)
Proficiency with Apple's development tools (Xcode, Instruments, TestFlight) and CI/CD pipelines (Fastlane, CircleCI, Jenkins)
Familiarity with backend integration (REST/GraphQL APIs, authentication flows, WebSocket)
Experience with App Store submission process, code signing, provisioning, and distribution
Knowledge of performance profiling, memory management, and battery optimization on iOS devices
Comfortable working with globally distributed teams
Bachelor's degree in Computer Science, Engineering, or equivalent practical experience
Preferred
Experience with AWS or other cloud environments (monitoring, logging, crash reporting tools)
AI software development experience specially AI agents, Claude Code, etc
Experience with unit testing (XCTest, Quick/Nimble) and UI testing; knowledge of snapshot testing
Experience building consumer-facing or enterprise iOS apps in point-of-sale, hospitality, retail, payments, or fintech domains
Company
Shift4
Shift4 (NYSE: FOUR) is boldly redefining commerce by simplifying complex payments ecosystems across the world.
1001-5000 employees
H1B Sponsorship
Shift4 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 (6)
2024 (4)
2023 (7)
2022 (1)
2020 (1)
Funding
Current Stage
Public CompanyTotal Funding
$3.81B2025-12-03Post Ipo Debt· $507.13M
2025-05-08Post Ipo Debt· $1.31B
2025-05-01Post Ipo Equity· $875M
Leadership Team
Nate Hirshberg
Senior Vice President, Marketing
J
Jared Isaacman
Executive Chairman
Recent News
Investor's Business Daily
2025-12-26
2025-12-24
2025-12-24
Company data provided by crunchbase