Senior Software Engineer

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 Senior Software Engineer 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.