Fiserv

Senior Software Engineer - Integrated Payment Experience (IPX)

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

Qualifications

  • Bachelor's degree in Computer Science, Software Engineering, or relevant experience.
  • 5+ years of software engineering experience focused on native Android development with Kotlin.
  • Hands-on backend development experience in Java.
  • Proven experience with hybrid stack combining Android development and backend microservices.
  • Deep understanding of payment lifecycles and security standards like PCI-DSS and tokenization.
  • Experience building integration points for 3rd-party developers.

Responsibilities

  • Architect and maintain over 20 native Android applications using Kotlin and Jetpack.
  • Build and support Clover SDKs and APIs for 3rd-party developers.
  • Design and develop Java backend microservices and middleware.
  • Create custom native applications for Clover hardware and integrate external software.
  • Collaborate with backend teams to optimize and define RESTful API contracts.
  • Enforce strict security protocols across applications and 3rd-party integrations.
  • Oversee quality and stability of multi-app deployments across Clover devices.

Benefits

  • Fuel Your Life program supporting overall well-being.
  • Generous paid holidays and time-off policies.
  • No-cost mental health support through Employee Assistance Programs.
  • Employee recognition program with redeemable points for rewards.
  • Opportunity for professional growth through training and development.
  • Medical, dental, vision, life, and disability insurance from day one.
  • Retirement planning and discounted shares through Employee Stock Purchase Plan.
  • Tuition assistance and reimbursement available.
  • Paid parental, caregiver, and military leave.
Full Job Description
Job Title
Senior Software Engineer - Integrated Payment Experience (IPX)

About your role:

Fiserv is a global leader in financial technology, and our Clover platform empowers millions of merchants worldwide to accept payments and manage their business operations. The Integrated Payment Experience (IPX) team builds and maintains the core software ecosystem powering these transactions-owning a portfolio of 20+ native Android applications, public SDKs, and integration microservices deployed across Clover POS terminals. As a Senior Software Engineer, you will work in a hybrid full-stack capacity (predominantly focused (~80%) on native Android development with ~20% backend Java/microservices contribution) to bridge POS hardware, merchant applications, and 3rd-party integrators by building resilient client architectures, defining robust client-to-server API contracts, and enforcing strict payment security standards across our global device fleet.

What you'll do:
  • Architect, modularize, and maintain a portfolio of 20+ native Android applications using Kotlin, Jetpack, Coroutines, and Clean Architecture (~80% focus).
  • Build, document, and support public-facing Clover SDKs and APIs that empower 3rd-party developers to build seamless payment applications on our platform.
  • Design, build, and support lightweight Java backend microservices, gateways, or integration middleware (~20% focus) that connect mobile endpoints to server-side payment infrastructure.
  • Develop custom native applications running directly on Clover Android hardware while building resilient semi-integrated (SEMI) solutions to connect external software endpoints.
  • Partner closely with server and backend engineering teams to define, optimize, and consume robust RESTful API contracts for end-to-end transaction flows.
  • Enforce strict payment security protocols (including Android KeyStore management and server-side tokenization) across all applications, SDKs, and 3rd-party integration touchpoints.
  • Own end-to-end quality, fleet stability, and release operations for multi-app deployments across a massive network of Clover devices.
  • Responsibilities listed are not intended to be all-inclusive and may be modified as necessary.


Experience you'll need to have:
  • Bachelor's degree in Computer Science, Software Engineering, or equivalent professional experience.
  • 5+ years of professional software engineering experience, primarily focused on native Android development using Kotlin, alongside hands-on backend development in Java.
  • Demonstrated ability to work across a hybrid stack-combining client-side Android mobile development (~80%) with backend microservices engineering (~20%).
  • Demonstrated experience developing, maintaining, or modularizing multi-app Android codebases, client-facing SDKs, or developer libraries.
  • Hands-on experience building and integrating RESTful APIs and Java backend microservices, with a clear understanding of client-server architecture principles.
  • Deep understanding of payment lifecycles (auth, capture, void, refund, tip adjustments, terminal setup) and security standards (PCI-DSS, EMV, tokenization).
  • Proven experience building or maintaining integration touchpoints for 3rd-party developers and external partners.


Experience that would be great to have:
  • Hands-on experience developing native apps or SEMI integrations for Clover POS hardware using Clover SDKs, Clover Connector, or REST Pay API (or experience with Verifone, Ingenico, Square, PAX).
  • Proficiency with Java / Spring Boot for building backend integration microservices or middleware to support mobile APIs.
  • Proficiency in Android debugging tools (ADB, Android Studio, memory profiling) and secure Android OS patterns (KeyStore, hardware-backed encryption).
  • Experience designing intuitive API contracts, SDK developer documentation, or integration guides for external developers.
  • Experience managing CI/CD automation pipelines for application fleets (Fastlane, Bitrise, GitHub Actions, Jenkins).
  • Hands-on experience with hardware/peripheral integrations over USB, Serial, or Bluetooth protocols on Android.


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


#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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