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 TitleSenior Software Engineer - Commerce HubWhat does a successful Senior Software Engineer do?As a Senior Software Engineer in our Payment Processing group, you will help modernise critical systems and contribute to building the next generation of event-driven, cloud-native payment services.You will play a key role in designing and engineering scalable, reliable solutions, supporting our journey to microservices and modern development practices. This is an opportunity to work with cutting-edge technologies, contribute to the evolution of our engineering culture, and drive meaningful impact within a mission-critical platform.What you will doDesign, develop, and deliver high-quality, scalable services in a microservices and event-driven architecture environment.Participate in system decomposition, refactoring, and modernisation of legacy components.Contribute to the evolution of our core technology stack (Java, AWS, Kafka, Kubernetes), ensuring systems are secure, resilient, and performant.Drive engineering excellence through thoughtful design, testing, code reviews, and reliability practices.Improve tooling, pipelines, and automation to support continuous delivery and faster feedback loops.Collaborate closely with peers and support junior engineers by sharing knowledge and best practices.Balance modernisation goals with delivery commitments, helping the team make pragmatic engineering decisions.What you will need to haveStrong hands-on experience building and delivering software in complex, distributed environments.Proficiency in Java and modern development frameworks and tooling.Practical experience with AWS and cloud-native application development.Knowledge of event-driven systems and experience with Kafka or similar streaming platforms.Hands-on familiarity with Kubernetes and container-based architectures.Experience working with CI/CD pipelines and DevOps practices.Thank you for considering employment with Fiserv. Please:Apply using your legal nameComplete the step-by-step profile and attach your resume (either is acceptable, both are preferable).Our commitment to Diversity and Inclusion: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.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.