Senior full stack .Net Developer

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

What does a successful Senior full stack .Net Developer do at Fiserv?

A successful Senior full stack .Net Developer at Fiserv designs builds and maintains high-quality applications that support business goals and client needs. You partner with cross-functional teams to translate requirements into scalable, reliable solutions across the stack. You raise engineering standards through mentoring, strong delivery practices, and responsible use of AI-assisted development tools.

What you will do?

• Lead the design, development, and implementation of software applications to support Fiserv business goals.
• Collaborate with cross-functional teams to gather requirements and translate them into technical specifications.
• Perform coding, testing, and debugging to ensure optimal performance and reliability.
• Maintain and improve existing codebases and lead peer review processes to strengthen quality and consistency.
• Mentor junior developers and provide technical guidance, including leveraging AI tools (GitHub Copilot in Visual Studio or ChatGPT Code Interpreter) to accelerate .NET UI development, generate documentation/unit tests (for example, XML comments), and refactor for maintainability and performance.

What you must have?

• 10+ years of software development experience delivering production applications.
• 6+ years of programming experience with C#/.NET
• 3+ years of experience with SQL databases and 3+ years with AWS, Azure, or GCP services.
• 3+ years of experience with CI/CD + DevOps and 3+ years working in Agile.

What would be nice to have:

• 2+ years of experience in financial services or payments technology.
• 1+ year using AI-assisted development tools (for example, GitHub Copilot or ChatGPT Code Interpreter) to generate functions/classes, tests, and documentation.
• 1+ year applying AI tools to improve code quality (for example, refactoring UI code, suggesting performance improvements, and establishing cleaner patterns across large .NET projects).

Salary Range

These pay ranges apply to employees in New Jersey and New York. 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.

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 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 [email protected]. 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.

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