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 Full-stack .Net Developer
What does a successful full stack .Net developer do at Fiserv? A successful full stack .Net Developer at Fiserv designs, builds, and supports secure, high-quality applications that align to business goals and client needs. You work end-to-end across modern UI and scalable backend services, partnering with cross-functional teams to translate requirements into reliable solutions. You improve delivery speed and code quality by applying CI/CD, Agile practices, and AI-assisted development tools responsibly.
What you will do? - Lead the design, development, and implementation of full-stack software solutions that support Fiserv business goals and client outcomes.
- Collaborate with cross-functional partners to gather requirements and convert them into clear technical specifications and delivery plans.
- Perform hands-on coding, testing, and debugging to ensure application performance, stability, and maintainability across front end and backend components.
- Maintain and enhance existing codebases, drive peer reviews, and raise engineering standards through clean patterns and continuous improvement.
- Mentor junior developers and provide technical guidance, including effective use of AI coding tools (for example, using GitHub Copilot in Visual Studio to accelerate .NET UI development, generate documentation/tests, and refactor for maintainability).
What you must have? - 6+ years of software development experience delivering production applications.
- 6+ years of backend development experience with .NET/C# (Java acceptable as an additional backend language).
- 4+ years of modern front-end development with JavaScript (React preferred) and 2+ years with CI/CD + DevOps practices.
- 2+ years working in Agile teams.
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, tests, and documentation.
- 1+ year applying AI tools to improve code quality (for example, refactoring suggestions, performance improvements, and establishing cleaner UI patterns across large .NET projects)
Salary Range $97,500.00 - $164,400.00
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.
This position is not eligible for an annual incentive opportunity and is also not eligible to earn commissions.
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 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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