Fiserv

Senior iOS Engineer - Payments & Hardware Integrations

Fiserv • $140K — $210K *
Consumer Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • 5+ years of hands-on experience building complex native iOS applications using Swift and Objective-C.
  • Proven experience working with payment processors and EMV kernels.
  • Hands-on experience with Bluetooth Low Energy (BLE) or USB accessory integration.
  • Familiarity with industry certification standards like PCI-DSS and EMVCo.
  • Solid understanding of secure key management and low-level protocol debugging.

Responsibilities

  • Design and maintain iOS framework components for payment reader hardware.
  • Lead efforts for device and software payment certification.
  • Integrate transaction processing and cryptographic protocols on iOS.
  • Conduct real-time debugging and performance optimization in hardware labs.
  • Act as a Subject Matter Expert for iOS payments, facilitating global communication.

Benefits

  • Fuel Your Life program for comprehensive well-being support.
  • Generous paid holidays and time-off policies.
  • Access to free mental health support through Employee Assistance Programs.
  • Peer recognition through the Living Proof program for additional rewards.
  • Diverse Employee Resource Groups to enhance collaboration and networking opportunities.
  • Extensive professional growth through training and development.
  • Medical, dental, vision, life, and disability insurance from day one.
  • Retirement planning options and employee stock purchase discounts.
  • Tuition assistance and reimbursement available.
  • Paid parental, caregiver, and military leave.
Full Job Description
Job Title
Senior iOS Engineer - Payments & Hardware Integrations

About your role:

Clover, a Fiserv company, 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 with deep expertise in mobile payments, payment reader hardware integration, and core transaction flows. Based in Sunnyvale, you will serve as the hands-on technical lead driving hardware certification, reader SDK integrations, and alignment with our Core Payments infrastructure. You will work closely with on-site hardware labs, certification teams, and cross-functional engineering groups to ensure fast, secure, and compliant mobile payment experiences.

What you'll do:
  • Design, build, and maintain native iOS framework components for Bluetooth Low Energy (BLE) and EMV card readers, including Go3 reader hardware and next-generation terminal integrations.
  • Lead end-to-end device and software payment certification efforts (e.g., PCI-DSS, PCI-PTS, EMVCo L1/L2/L3) in close collaboration with on-site lab teams.
  • Interface directly with Core Payments engineering to integrate transaction processing, tokenization, refunds, and cryptographic protocols on iOS.
  • Utilize on-site hardware lab access in Sunnyvale to conduct real-time hardware debugging, reader firmware testing, and performance optimization.
  • Serve as the US-based Subject Matter Expert (SME) for iOS payments, bridging communication between local infrastructure teams and global development groups.
  • Responsibilities listed are not intended to be all-inclusive and may be modified as necessary.


Experience you'll need to have:

  • iOS Expertise: 5+ years of hands-on experience building complex, production-grade native iOS applications using Swift and Objective-C.
  • Domain Knowledge (Payments): Proven track record working with payment processors, EMV kernels, ISO 8583 / point-of-sale protocols, or card-present payment architectures.
  • Hardware/SDK Integration: Hands-on experience integrating external Bluetooth Low Energy (BLE), MFi (Made for iPhone), or USB accessories/readers into iOS apps.
  • Certification Standards: Experience navigating payment industry standards (PCI-DSS, PCI-PTS, EMVCo) and executing device certification cycles.
  • Debugging & Architecture: Deep understanding of secure key management, cryptographic protocols (DUKPT, AES, RSA), multithreading, and low-level protocol debugging.


Experience that would be great to have:

  • Prior experience with POS (Point of Sale) platforms or reader hardware (e.g., Clover, Square, Ingenico, Verifone).
  • Experience writing or maintaining shared native C/C++ libraries wrapped for iOS.


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.


Sponsorship:

  • You must currently possess valid and unrestricted U.S. work authorization to be considered for this role. Individuals with temporary visas including, but not limited to, F-1 (OPT, CPT, STEM), H-1B, H-2, or TN, or any candidate requiring sponsorship, now or in the future, will not be considered for this role.


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


#LI-SH2

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.

It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.

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.

Thank you for considering employment with Fiserv. Please:

  • Apply using your legal name
  • Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).

About Fiserv

CashEdge(R) provides infrastructure that global financial institutions rely on to extend their online channels and enhance customer profitability. CashEdge delivers secure Online Money Movement and Advanced Account Aggregation platforms that power specialized retail banking and advisor applications. These proven solutions enable CashEdge's clients to create compelling online offerings that attract customers, generate revenues, and reduce costs. CashEdge serves top-tier financial institutions around the world. Clients and partners include Vanguard, RBC Financial Group, CIBC, Yahoo! Finance, Digital Insight, First Data, TD Canada Trust, NYCE, Laurentian Bank, Financial Fusion and Corillian. CashEdge has offices in New York and Silicon Valley.

Fiserv Careers

Join the Fiserv team today and be part of a dynamic company known for innovation, leadership, and a commitment to the professional growth of its employees. At Fiserv, we offer more than just job opportunities; we provide a platform where skills are honed, leadership is cultivated, and career aspirations are achieved. Work You’ll Do At Fiserv, we are constantly on the lookout for talented individuals eager to thrive in a culture that fosters growth and diversity. Our team is composed of professionals who lead the way in financial services technology. By joining us, you will collaborate with some of the brightest minds in the industry, working together to solve complex challenges and deliver innovative solutions that impact millions of people every day. Explore Our Job Opportunities Whether you're seeking an entry-level position or a more senior role, Fiserv offers a range of career paths in areas such as software development, project management, financial analysis, and client services. Our hiring process is designed to identify and attract individuals who are not only technically proficient but who also embody our values of integrity and responsibility. Internship Programs Kickstart your career with a Fiserv internship. Our internships provide invaluable workplace experience and networking opportunities that often lead to full-time employment. As an intern, you’ll gain hands-on experience while working on meaningful projects that directly contribute to the company’s goals. Benefits and Culture Fiserv is committed to the well-being and continuous development of our employees. We offer competitive benefits including health, dental, and vision insurance, as well as opportunities for professional development through leadership training and diversity programs. Our culture is one of inclusion, where every team member is valued and has the opportunity to contribute to our success. Career Growth and Development We believe in nurturing the potential of our employees through career development initiatives and continuous learning opportunities. At Fiserv, you will find a supportive environment where you can grow your career through on-the-job experiences, mentoring, and formal training. Stay Connected Join Our Team Search open positions that match your skills and interests. We look for passionate, curious, creative, and solution-driven team players. Start your journey with Fiserv today and help shape the future of financial services. Keep Up to Date Stay ahead with career tips, insider perspectives, and industry-leading insights you can put to use today—all from the people who work here. Job Alert Emails Personalize your subscription to receive job alerts, latest news, and insider tips tailored to your preferences. Discover the exciting and rewarding career opportunities that await at Fiserv. Explore, innovate, and grow with Fiserv. Let your career journey begin here, where you can make a real difference in the world of finance.
Learn more about Fiserv
Size
44,000 employees
Market Cap
$63.4 billion
Industry
Net Income
$958 million
Founded
1984
5 Year Trend
+24.1%
Revenue
$14.8 billion
NASDAQ

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