Senior Java Software Developer (Modern Architectures & Distributed Systems)

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 Java Software Developer (Modern Architectures & Distributed Systems) About your role: We are looking for a Senior Java Software Developer to help elevate our backend engineering and take our distributed platform to the next level. While our teams already operate with established domain services, we need a forward-thinking technical lead to drive the next evolution of our architecture—transitioning toward event-driven, highly resilient, and modern microservice paradigms. You will design, build, monitor, and maintain high-throughput backend systems within a scalable Docker/Kubernetes environment. As a Senior Developer, you will set the technical bar, champion modern software craftsmanship, and partner with cross-functional teams to deliver secure, observable, and production-grade software at scale. What you’ll do: Architect, build, and maintain next-generation, event-driven microservices and high-performance APIs (REST/gRPC) that evolve our platform beyond traditional domain service boundaries. Drive modern architectural patterns (e.g., Event-Driven Architecture, CQRS, Saga/Outbox patterns, and Reactive Programming) to maximize system responsiveness, decoupling, and scalability. Establish operational excellence and observability standards across services, incorporating OpenTelemetry, distributed tracing, structured logging, and proactive alerting. Implement resilient integration patterns (circuit breakers, rate limiting, retries) and asynchronous messaging workflows using Kafka or SQS/RabbitMQ. Design and execute automated unit, integration, and contract tests to ensure zero-downtime, continuous deployment capabilities. Own containerized application lifecycles, collaborating with platform engineering on Kubernetes deployments, Helm/Kustomize manifests, and GitOps workflows. Elevate developer velocity across the engineering organization by establishing modern SDLC practices, leveraging AI-assisted coding tools, and refining CI/CD pipelines. Mentor engineers, lead rigorous architecture and design reviews, and foster a culture of shared technical ownership and continuous learning. Actively participate in Scrum Agile ceremonies, serving as a key technical voice in project estimation, technical scoping, and platform strategy discussions. Responsibilities listed are not intended to be all-inclusive and may be modified as necessary. Experience you’ll need to have: Education: Bachelor’s degree in Computer Science, Engineering, or equivalent practical experience. Seniority: 7+ years of professional experience building, scaling, and maintaining complex backend production systems within an agile product environment. Core Java & Spring Ecosystem: Mastery of modern Java (Java 17/21+) and deep expertise with Spring Boot for building enterprise-grade microservices and gRPC/REST APIs. Advanced Architectural Patterns: Demonstrated experience modernizing backend platforms beyond basic domain services into asynchronous, event-driven, and loosely coupled distributed architectures. Containerization & Orchestration: Direct hands-on experience containerizing workloads with Docker and running microservices in production Kubernetes environments. Distributed Data Systems: Deep understanding of relational (PostgreSQL/MySQL) and NoSQL/caching stores (Redis), including schema design, query optimization, and distributed data consistency trade-offs. Security & Compliance: Practical knowledge of secure coding practices, OAuth2/OIDC, mTLS, and secrets management tools (e.g., HashiCorp Vault). Engineering Rigor & Velocity: Proven track record with modern CI/CD pipelines, automated testing (unit, integration, mock frameworks), and AI-assisted engineering tools. Experience that would be great to have: Hands-on experience with streaming/event platforms (Apache Kafka) and implementing event-sourcing or transactional outbox patterns. Experience with advanced Kubernetes ecosystem tools (Helm, ArgoCD, Kustomize, Istio/Service Mesh). Exposure to cloud-native infrastructure (AWS, GCP, or Azure) using Infrastructure-as-Code (Terraform). Deep experience establishing full-stack observability stacks (OpenTelemetry, Prometheus, Grafana, Datadog). Proven success mentoring mid-level engineers and guiding teams through architectural modernizations. How you’ll work: 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. This role requires use of a computer and audio equipment. Sponsorship: 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. Benefits at Fiserv: Fuel Your Life program to support your physical, financial, social, and emotional well-being Paid holidays and generous time away policies No-cost mental health support through Employee Assistance Programs Living Proof program to recognize your peers’ extra effort with points redeemable for rewards Eight Employee Resource Groups to foster a collaborative culture and expand your network ·Unparalleled professional growth with training, development, and internal mobility opportunities Medical, dental, vision, life, and disability insurance options available from day one Retirement planning and discounted shares with the Employee Stock Purchase Plan Tuition assistance and reimbursement program Paid parental, caregiver, and military leave #LI-SH2 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. 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 . 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