Senior Software Engineer

Fiserv • Sunnyvale, CA • 16h ago

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 Software Engineer - .NET do at Clover?

As a .NET Software Engineer at Clover, you will design, build, and maintain high-performance backend systems and RESTful APIs using C# and .NET 8. Working with complex multi-tenant database architectures and cloud-hosted environments, you will drive seamless integrations with third-party platforms while ensuring robust security, performance, and reliability across our applications.

What you will do:

Build high-performance RESTful Web APIs using C# and ASP.NET Core.

Support and maintain existing code written in legacy .NET Framework codebases.

Write, debug, and optimize complex raw SQL queries in MySQL and manage multi-tenant database architectures.

Develop and consume RESTful endpoints, process JSON payloads, and manage Webhook events and OAuth 2.0 authentication for third-party integrations.

Utilize Visual Studio, Git (Azure DevOps), Docker, and cloud-hosted environments (AWS / GCP) for development and deployment.

What you will need to have:

C# & .NET 8 / ASP.NET Core: Strong backend development skills for building high-performance RESTful Web APIs.

Legacy .NET Framework Familiarity: Comfort working with or supporting code written in legacy .NET Framework codebases.

Raw MySQL & Hand-Crafted SQL: Excellent proficiency in writing, debugging, and optimizing complex raw SQL queries without reliance on ORMs.

Multi-Tenant Architecture: Experience with multi-tenant database designs, tenant isolation strategies, and efficient connection handling.

REST APIs & Webhooks: Experience building and consuming RESTful endpoints, processing JSON payloads, and managing Webhook events for third-party integrations.

OAuth 2.0 & Authentication: Understanding of token management and securing external API communication.

IDE & Tooling: Proficiency in Visual Studio for backend development and debugging.

Git Version Control: Hands-on experience using Git within environments like Azure DevOps.

Docker & Basic Cloud Context: Experience using Docker for local development setup and familiarity working within cloud-hosted environments (AWS / GCP).

What would be great to have:

Java Background (Bonus): Exposure to Java backend technologies is a plus, as parts of the ecosystem may leverage Java in future iterations.

Experience with React and Typescript

Salary Range

$160,000.00 - $240,000.00

These pay ranges apply to employees in Sunnyvale, California. 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.

For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company's sole discretion.

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 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.

Fiserv

Go to Apply

Share this job

Similar Jobs

OnSite Environmental Technician I

Republic Services • Sunnyvale, CA • 5h ago

IT & Engineering

POSITION SUMMARY: Responsible for assisting in the collection, identification and proper packaging and/or lab packing of hazardous and non-hazardous waste as well as administrative duties at the client site as well as sp...

5h ago

Go to Apply

Engineer I, Manufacturing

Abbott • Pleasanton, CA • 15h ago

IT & Engineering

Abbott is a global healthcare leader that helps people live more fully at all stages of life. Our portfolio of life-changing technologies spans the spectrum of healthcare, with leading businesses and products in diagnost...

15h ago

Go to Apply

Software Engineering Intern

Meta • Menlo Park, CA • 16h ago

IT & Engineering

Summary: Want to build new features and improve existing products that more than a billion people around the world use? Are you interested in working on highly impactful technical challenges to help the world be more ope...

16h ago

Go to Apply

Software Engineer 2

Intuit • Mountain View, CA • 16h ago

IT & Engineering

Overview Come join the Intuit Enterprise Builders team as a Senior Software Engineer. As Intuit expands its footprint in the Mid-Market and Enterprise segment, you will be part of the group enabling the product to be abl...

16h ago

Go to Apply

Software Engineer 2

Intuit • Mountain View, CA • 16h ago

IT & Engineering

16h ago

Go to Apply

Software Engineer

ServiceNow, Inc. • Santa Clara, CA • 16h ago

IT & Engineering

It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could do that for everyone-freeing peo...

16h ago

Go to Apply

ASIC Engineer

Cisco • San Jose, CA • 20h ago

IT & Engineering

The application window is expected to close on: 10/29/2026 This position will be hybrid from our San Jose, CA office. Meet the Team You'll be joining an elite crew in Silicon Operations! You'll work hand-in-hand with the...

20h ago

Go to Apply

2027 Summer Intern - Machine Learning Intern, Autonomous Vehicles: Software Validation (Master's)

General Motors • Sunnyvale, CA • 20h ago

IT & Engineering

Onsite Sunnyvale, California, United States of America Full time JR-202621655 Job Description About the Team: The Autonomous Vehicle (AV) organization is dedicated to advancing the development of autonomous vehicles thro...

20h ago

Go to Apply

2027 Summer Intern - Machine Learning Intern, Autonomous Vehicles: Software Validation (PhD)

General Motors • Sunnyvale, CA • 1d ago

IT & Engineering

Onsite Sunnyvale, California, United States of America Full time JR-202621649 Job Description About the Team: The Autonomous Vehicle (AV) organization is dedicated to advancing the development of autonomous vehicles thro...

1d ago

Go to Apply

AI Solution Architect Graduate Intern

Intel • Santa Clara, CA • 1d ago

IT & Engineering

Job Details: Job Description: Intel is seeking an AI Infrastructure Solution Architect Intern to join our AI Platforms team. As an intern, you will work alongside experienced engineers to support AI accelerator platforms...

1d ago

Go to Apply

Subscribe to get new jobs sent directly to you
(no charge, cancel anytime)