Job Title
Senior iOS Engineer – Payments & Hardware Integrations
About Your Role
Clover is a global leader in point-of-sale platforms powering millions of small businesses worldwide with integrated hardware, software, and payment solutions. We are seeking a Senior iOS Engineer who enjoys bridging high-level mobile software with physical hardware. Based at our campus in Sunnyvale, CA, you will serve as a hands-on technical lead driving mobile hardware integrations, Bluetooth reader SDKs, and core transaction flows across our native iOS framework. In this role, you will work closely with our on-site hardware labs, product teams, and Core Payments engineering to ensure fast, reliable, and secure mobile payment experiences. If you love building software that interacts with physical accessories—from Bluetooth readers to smart terminal devices—we want to talk to you!
What You Will Do
•Hardware & SDK Engineering: Design, build, and maintain modular native iOS SDKs and frameworks that communicate with Bluetooth Low Energy (BLE) card readers, smart accessories, and next-generation terminal hardware.
•Core Payment Integrations: Partner with backend and Core Payments teams to integrate transaction processing, tokenization, refunds, and secure cryptographic communications on iOS.
•On-Site Prototyping & Lab Debugging: Leverage our state-of-the-art Sunnyvale hardware lab for real-time hardware-in-the-loop debugging, reader firmware testing, and performance optimization.
•System Architecture: Write clean, maintainable Swift and Objective-C components emphasizing thread safety, low latency, and robust offline-first execution.
•Global Team Alignment: Serve as a U.S.-based technical lead for iOS hardware integrations, bridging communication between local lab teams and global engineering groups.
What You Need to Have
•iOS Mastery: 5+ years of hands-on experience building, testing, and shipping production-grade native iOS applications or frameworks using Swift and Objective-C.
•Hardware & Peripheral Integration: Hands-on experience connecting iOS applications to external hardware accessories or peripherals using CoreBluetooth, Bluetooth Low Energy (BLE), MFi (Made for iPhone), or USB interfaces.
•Framework Architecture: Deep understanding of iOS framework design, API architecture, multithreading, memory management, and asynchronous networking.
•Security & Network Foundations: Exposure to secure key management, cryptographic principles (e.g., AES, RSA, tokenization), or REST/WebSocket APIs.
•Debugging & Problem-Solving: Curiosity and drive to troubleshoot complex edge cases spanning software, network protocols, and physical hardware layers.
Experience That Would Be Great to Have
•Card Reader & Payment Experience: Any prior experience working with payment processors, card readers (e.g., Clover, Square, Stripe Terminal, Ingenico, Verifone), or point-of-sale (POS) systems is highly valued.
•Compliance Exposure: Familiarity with payment industry standards (PCI-DSS, PCI-PTS, EMVCo) or device certification workflows.
•C/C++ Interop: Experience writing or maintaining shared native C/C++ libraries wrapped for iOS via Objective-C++ or Swift C-interop.
How You'll Work
•This role is on-site Monday through Friday. Fiserv considers in-person collaboration to be an essential part of this role as in-person office experiences help you with your overall onboarding experience and leads to stronger productivity.
•This role requires use of a computer and audio equipment.
Benefits at Fiserv
•Fuel Your Life program to support your physical, financial, social, and emotional well-being
•Paid holidays and generous time away policies
•No-cost mental health support through Employee Assistance Programs
•Living Proof program to recognize your peers' extra effort with points redeemable for rewards
•Eight Employee Resource Groups to foster a collaborative culture and expand your network
•Unparalleled professional growth with training, development, and internal mobility opportunities
•Medical, dental, vision, life, and disability insurance options available from day one
•Retirement planning and discounted shares with the Employee Stock Purchase Plan
•Tuition assistance and reimbursement program
•Paid parental, caregiver, and military leave
Salary Range
$140,000.00 - $210,000.00
These pay ranges apply to employees in Sunnyvale, California. Pay ranges for employees in other states may differ. For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company's sole discretion.
