Design and implement scalable, highly available, resilient, and secure microservices using C#/.NET and Microsoft Azure.
Develop well-defined REST APIs and domain-aligned services using sound API design and Domain-Driven Design (DDD)principles.
Apply specification-driven development practices by translating business requirements into structured functional and technical specifications that guide implementation and testing.
Use AI-assisted engineering tools throughout the SDLC to accelerate requirements analysis, solution design, code generation, refactoring, code review, test generation, documentation, and troubleshooting.
Review, validate, and improve AI-generated code and technical artifacts to ensure they meet architecture, security, performance, maintainability, and engineering standards.
Build solutions for critical payment scenarios including transaction processing, idempotency, retries, error handling, asynchronous processing, and cross-domain event communication.
Design and implement data-access patterns using technologies such as Azure SQL, Cosmos DB, and Redis.
Develop event-driven integrations using technologies such as Azure Service Bus and Azure Event Hubs.
Implement application security patterns including token-based authentication, authorization, secure service-to-service communication, and secrets management.
Develop automated unit, integration, API, and component tests, including effective use of AI-assisted test generation while maintaining appropriate engineering validation.
Experience you'll need to have
6+ years of professional software development experience, including designing and delivering enterprise-grade applications.
4+ years of hands-on C#/.NET development experience, preferably building APIs, microservices, or distributed backend services.
3+ years of experience with Microsoft Azure and cloud-native application development.
Strong experience designing and developing RESTful APIs and microservice-based architectures.
Strong experience with SQL and relational database design, transactional processing, query optimization, and data-access patterns.
Experience with distributed application concepts including idempotency, retries, resiliency, caching, asynchronous processing, and eventual consistency.
Experience with messaging or event-driven architectures using technologies such as Azure Service Bus, Event Hubs, Kafka, or equivalent.
Experience with CI/CD, automated testing, source control, and modern DevOps practices.
Hands-on experience using AI-assisted software engineering tools as part of day-to-day software development, including code generation, refactoring, test generation, code analysis, documentation, and problem solving.
Experience with specification-driven development, including translating requirements into structured specifications and using those specifications to guide software design, implementation, and validation.
Demonstrated ability to critically review and validate AI-generated software rather than relying on generated output without appropriate engineering oversight.
Experience implementing application security, authentication, and authorization in enterprise applications.
Experience troubleshooting
production applications using logs, metrics, distributed tracing, and observability tooling.
Experience working within Agile engineering teams and collaborating across product, architecture, QA, security, and infrastructure functions.
Bachelor's degree in Computer Science, Information Technology, Information Systems, a related field (or foreign equivalent degree), or equivalent work experience.
Experience that would be great to have
Experience building or modernizing payment processing, financial services, fintech, or high-volume transactional platforms.
Experience with OpenTelemetry, Dynatrace, or comparable observability platforms.
Experience modernizing legacy payment applications into cloud-native architectures.
Important information about this role
This role is on-site Monday through Friday. Fiserv considers in-person collaboration to be an essential part of this role as in-person office experiences help you with your overall onboarding experience and leads to stronger productivity.
You must currently possess valid and unrestricted U.S. work authorization to be considered for this role. Individuals with temporary visas including, but not limited to, F-1 (OPT, CPT, STEM), H-1B, H-2, or TN, or any candidate requiring sponsorship, now or in the future, will not be considered for this role.
This is a full-time, direct-hire position, and no contract options for unsolicited agency submissions will be considered.
All offers of employment are contingent on standard background checks. Fiserv and certain of its affiliated companies are federal, state, and/or local government contractors. Should this position support a Federal Government contract, now or in the future, the successful candidate will be subject to a background check conducted by the U.S. Government to determine eligibility and suitability for federal contract employment for public trust or sensitive positions. Positions that support state and/or local contracts also may require additional background checks to determine eligibility and suitability.
This role is not eligible to be performed in Colorado, California, District of Columbia, Hawaii, Illinois, Massachusetts, Maryland, Minnesota, New Jersey, New York, Nevada, Rhode Island, Vermont, Virginia, Maine or Washington.
It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.
Please note that salary ranges provided for this role on external job boards are salary estimates made by outside parties and may not be accurate.
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.
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