Jobs › Fiserv

Software Development Engineering – Advisor

Fiserv · Milwaukee, WI · Full time

Posted Oct 2, 2026 · We last checked this listing on Oct 6, 2026

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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

Tell me about a feature you designed and shipped on a SaaS platform. What was your part, and how did it perform in production?

What they are checking: Whether they own work end to end, including how it behaves for real users after release.

Tell me about a time you improved code quality on a team.

What they are checking: Whether they raise standards through reviews, tests and refactoring, which the role names.

Tell me about a technical disagreement with another engineer. How did you resolve it?

What they are checking: Whether they can settle disagreements with data and respect rather than rank.

What would you do

A business analyst brings you a requirement that's vague. How do you turn it into something you can build?

What they are checking: Whether they can work with analysts to clarify rules and edge cases before coding.

An implementation partner reports a defect affecting a bank client. How do you handle it?

What they are checking: Whether they act urgently and communicate clearly when a financial institution is affected.

About the work

What makes building a core banking platform like Finxact different from building a typical web app?

What they are checking: Whether they understand accuracy, auditability and consistency needs when money and ledgers are involved.

How would you design an API that posts transactions so that a retry never double-posts?

What they are checking: Whether they understand idempotency and consistency, which are essential in financial systems.

How do you approach testing for a feature that calculates interest or fees?

What they are checking: Whether they test edge cases, rounding and dates carefully, since small errors affect many accounts.

How do you design services to scale in the cloud while staying secure?

What they are checking: Whether they think about horizontal scaling, data protection and access control together.

What do you look for when reviewing a teammate's pull request?

What they are checking: Whether their reviews catch real problems and help others grow, as an advisor-level engineer should.

How do you keep a large, shared codebase maintainable over years?

What they are checking: Whether they value clear design and documentation on a long-lived platform.

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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 – Advisor TITLE: Software Development Engineering – Advisor EMPLOYER: Fiserv Solutions, LLC LOCATION: Milwaukee, WI (and various unanticipated locations throughout the U.S. subject to authorization from management) DUTIES: Develop solutions and serve as a COBOL analyst on online and batch applications that support merchant solutions as part of the Posting and Billing application for South Platform. Design and develop computer systems or programs based on user defined requirements. Manage code, programs, and tests, as well as analyze new application software. Implement client programming projects by applying knowledge of how technology relates to business, market and industry to support the needs of business. Develop customized solutions to support critical business functions and meet project objectives, client requirements and business goals. Provide system and application support for a multi-architecture applications including mainframe and end-to-end application delivery. Design and develop automation solutions to improve current process and transform manual repetitive tasks. Responsible for assigning resources and delegating tasks to meet project deliverables. REQUIREMENTS: Bachelor's degree in Computer Science, Information Technology, Software Engineering or a related field and 4 years in any job title involving software development experience in enterprise environments. Prior experience must include: 4 years supporting large-scale business critical systems; 4 years working in release management, UAT, and production support cycles; 4 years of software development life cycle (SDLC) and agile delivery practices; 4 years working with mainframe and distributed systems, including batch processing and file-based integrations; 4 years working with SQL and relational databases; 4 years working with version control tools including Gitlab and Endeavor; 3 years working with CI/CD pipelines, automated deployments, and controlled production releases; 2 years working with Java object-oriented programming language; and 2 years working in Unix/Linux environments. TRAVEL: None TO APPLY: Select “Apply” on this page and follow the prompts to attach resume and submit. JOB CODE: CR624 #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.

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