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This position has closed. Fiserv removed this listing from their careers page on Oct 6, 2026. The interview prep below is still useful, and there are similar open roles at the bottom of this page.

Software Development Engineering - Sr Professional II

Fiserv · Milwaukee, WI · Full time

Posted Sep 22, 2026 · We last checked this listing on Oct 4, 2026

Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Walk me through a feature you took from business requirements all the way to deployment.

What they are checking: Whether they have real experience across the full software development lifecycle the posting describes.

Tell me about a design document you presented. What questions did people ask, and how did you respond?

What they are checking: Whether they can explain and defend their designs to peers and stakeholders.

Describe a time requirements were unclear and you had to start building anyway.

What they are checking: Whether they manage ambiguity by asking good questions and building in small steps.

How do you keep your technical skills current while delivering on a busy team?

What they are checking: Whether they grow steadily rather than relying on old skills.

What would you do

A change you deployed causes a production issue. What do you do in the first hour?

What they are checking: Whether they stay calm, contain impact and communicate clearly during an incident.

A business analyst asks for a change late in a sprint. How do you respond?

What they are checking: Whether they balance flexibility with protecting delivery and quality.

About the work

How do you turn a business need into an application architecture and system process flow?

What they are checking: Whether they can design before coding and document how the pieces fit together.

How do you write a test plan for a change to a financial application?

What they are checking: Whether they plan unit, integration and regression testing that fits the risk of payments work.

How do you approach code changes in a large, older codebase you did not write?

What they are checking: Whether they can make safe changes in legacy systems common in financial services.

What makes a good code review, from both sides?

What they are checking: Whether they help maintain code quality and take feedback well.

Practice this interview out loud.

Offer builds a real interview for this exact role at Fiserv from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.

Practice this out loud

The full job description

As published by Fiserv.

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 Software Development Engineering - Sr Professional II TITLE: Software Development Engineering - Sr Professional II EMPLOYER: Fiserv Solutions, LLC LOCATION: Milwaukee, WI (and various unanticipated locations throughout the U.S. subject to authorization from management) DUTIES: Perform software development including all phases of the software development lifecycle from analysis to code deployment. Perform analysis of business needs and project requirements. Define the application architecture and system process flows. Attend, present, and prepare design documents. Perform coding changes to applications to deliver functionality. Create test plans and test cases as well as perform all testing phases. Perform research on application-related issues and report to application owners and application management. Perform application fixes and testing for deployment. Conduct long-term improvements for the applications to ensure compatibility with evolving mission requirements and to reduce application maintenance costs. Perform analysis on new requirements, provide estimates, and help application manager with project slotting. Present ideas to Product and IT management for application performance improvements and innovations to gain efficiency, reduce costs and increase revenue. Perform on-call production support. REQUIREMENTS: Bachelor's degree in Computer Science, Computer Engineering, Software Engineering or a related field and 2 years in any job title involving IT software development experience. Prior experience must include: 2 years developing in IBM Z/OS mainframes; 2 years developing with COBOL, VSAM, CICS, TCPIP, DB2, JCL, and Batch; 2 years working in the software development processes including requirement analysis, designs, coding, testing, and deployment production support; and 1 year using Jira for tracking application projects. TRAVEL: None TO APPLY: Select “Apply” on this page and follow the prompts to attach resume and submit. JOB CODE: CR623 #P3M It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran. Our commitment to Equal Opportunity: 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. If you have a disability and require a reasonable accommodation in completing a job application or otherwise participating in the overall hiring process, please contact AskHR.US@fiserv.com . Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiserv’s Disability Accommodation Policy for additional information. 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. Warning about fake job posts: 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.