Backend Application Architect

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 Backend Application Architect About your role: Fiserv is a global leader in financial technology, empowering millions of businesses worldwide through Clover’s smart point-of-sale (POS) and digital omni-commerce platform. As a Backend Application Architect, you will serve as a technical leader driving the architectural vision, strategy, and evolution of our core enterprise backend systems. In this role, you will architect resilient, high-volume transactional platforms and partner across product and engineering leadership to execute our strategic roadmap—accelerating international expansions across APAC, Japan, and the EU, eliminating backend dependencies to maximize feature velocity, and pioneering AI-driven agentic commerce integrations. What you’ll do: Drive the strategic architectural vision, technical roadmaps, and modernization of high-throughput, low-latency microservices and event-driven backend platforms. Design and govern scalable API ecosystems, data models, caching strategies, and storage solutions across relational and NoSQL engines to eliminate backend dependencies and maximize engineering velocity. Architect resilient backend services that support international expansion initiatives (APAC, Japan, EU) and enable cutting-edge AI-driven agentic commerce workflows. Establish non-functional requirements (NFRs) and architectural standards for performance, security, fault tolerance, zero-downtime deployments, and platform observability. Lead cross-team design reviews, evaluate emerging technologies, and de-risk high-stakes initiatives in partnership with Product, Business, and Executive leadership. Mentor and elevate Tech Leads and Senior Engineers across multiple scrum teams to foster a culture of technical excellence and engineering rigor. Responsibilities listed are not intended to be all-inclusive and may be modified as necessary. Experience you’ll need to have: Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related technical field. 12+ years of hands-on professional software engineering experience designing, building, and operating enterprise backend systems in Java environments. Deep mastery of the JVM ecosystem, Spring Boot, microservices architecture patterns (CQRS, Saga, Circuit Breaker), and distributed messaging systems (Kafka, Google Pub/Sub, RabbitMQ). Advanced proficiency in data architecture, schema design, and transaction management across both SQL (MySQL, PostgreSQL) and NoSQL (Cassandra, MongoDB, Redis) databases. Practical expertise with cloud-native platforms (GCP, AWS, or Azure), containerization (Docker, Kubernetes), and automated CI/CD deployment models. Proven track record in RESTful API design, OpenAPI/Swagger specifications, API security standards (OAuth2, JWT, mTLS), and JVM performance/concurrency tuning under heavy transaction loads. Experience that would be great to have: Prior experience architecting high-concurrency payment gateways, POS ecosystems, merchant services, digital storefronts, or global checkout pipelines. Familiarity with polyglot environments and secondary languages (Python, Go, Node.js, Next.js) for tooling, automation, or rapid prototyping. Hands-on experience with event-sourcing engines, serverless compute (Google Cloud Functions, AWS Lambda/Kinesis), or reactive frameworks (Spring WebFlux, RxJava). Strong understanding of PCI-DSS compliance, data encryption standards, and enterprise vulnerability management.