Senior Software Developer (m/f/d) – Clover

Calling all innovators – find your future at Fiserv.

We’re Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants, and consumers to one another millions of times a day – quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we’re involved. If you want to make an impact on a global scale, come make a difference at Fiserv.

Job Title

Senior Software Developer (m/f/d) – Clover

Full-time | Location: Vienna

Company Description

Clover delivers innovative, all-in-one point-of-sale solutions that simplify and streamline daily business operations. Our platform enables businesses across industries—from cafés and boutiques to salons—to accept payments, manage inventory, and run their operations efficiently.

With a strong focus on flexibility, customization, and intuitive user experience, Clover empowers merchants to grow and scale with confidence. Our solutions are powered by a secure cloud infrastructure and supported by global teams, ensuring reliability, performance, and continuous innovation.

Role Description

We are looking for a Senior Software Developer (m/f/d) to join our Clover development team in Vienna. In this role, you will design, develop, and maintain Android-based device software as well as Java back-end applications that handle secure card payment processing for the Clover platform.

You will work closely with cross-functional and international teams to deliver high-quality, scalable software solutions, solve complex technical challenges, and actively contribute to the continuous improvement of our products and development processes.

Your Responsibilities

• Design, build, certify, and operate complex systems that enable millions of secure transactions per day across a large fleet of smart payment terminals
• Develop and maintain Android applications using Java and Kotlin, as well as Java-based back-end services
• Implement and enhance interfaces to payment processing systems using various protocols and data formats (e.g. XML/SOAP, TCP, HTTP/S)
• Contribute to the development and adoption of the NEXO standard for European and global payment solutions
• Add and evolve payment features such as Dynamic Currency Conversion (DCC), Google Pay, Apple Pay, and other modern payment methods
• Support device-level payment certification processes for new and existing products
• Collaborate with international certification teams, test organizations, and partners
• Work closely with server-side engineers to ensure low latency, high availability, and scalability
• Partner with QA teams to define test strategies, review code, and ensure high software quality

What You Bring

• A strong foundation in computer science and software engineering principles
• A Bachelor’s degree in Computer Science or a related field, or equivalent hands-on experience
• Solid experience with Java, Kotlin, and SQL
• Experience building and operating complex, high-availability production systems
• Familiarity with Agile development methodologies and the full software development lifecycle (SDLC)
• Strong analytical and problem-solving skills with a high level of attention to detail
• Experience in payments, fintech, or point-of-sale systems is a strong plus
• A collaborative mindset and the ability to work effectively in international, cross-functional teams

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).

Our commitment to Diversity and Inclusion:

Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law. 

Note to agencies:

Fiserv does not accept resume submissions from agencies outside of existing agreements. Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.

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Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.