Principal Engineer Commerce Hub

Calling all innovators find your future at Fiserv.

Were 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 were involved. If you want to make an impact on a global scale come make a difference at Fiserv.

Job Title

About your role:

At Fiserv we are modernising a high-volume global payment processing platform moving from a monolithic batch-driven architecture to an event-driven microservices platform on AWS. This is a ground-up build: Confluent Cloud for event streaming Aurora PostgreSQL for persistence Kubernetes for compute and a modern Java/Kotlin stack throughout.

As a Principal Engineer you will drive technical delivery strategy across the programme shaping the architecture patterns teams build on driving the engineering practices that ensure quality at pace and making every team around you faster and more effective. You will have influence across both engineering teams and the architecture community coaching and challenging in equal measure.

You believe AI fundamentally changes how software is built and delivered and you will drive its adoption as a core part of how teams work from architecture and design through to code testing and delivery.

This is hands-on and outward-facing. You will lead through code architectural direction and constructive challenge ensuring we are building the right things in the right way and getting to production incrementally rather than in big-bang releases.

What youll do:

• Own the technical delivery strategy how we decompose sequence and integrate work so that teams deliver end-to-end value early and iterate from there.

• Shape cross-cutting architecture patterns resilience event-driven integration idempotency observability and ensure they are adopted consistently across services.

• Drive architecture decisions toward delivery challenging over-engineering unblocking teams when decisions stall and ensuring designs are practically deliverable.

• Establish engineering practices that scale: test-driven development contract testing continuous integration trunk-based development and vertical slicing.

• Coach and raise the bar across engineers and architects through pairing design review code review and hands-on demonstration of what good looks like.

• Apply domain-driven design practically bounded context integration aggregates in code anti-corruption layers bridging strategy and implementation.

• Define testing strategy for an event-driven microservices architecture unit integration contract and end-to-end with clear guidance on where each adds value.

• Ensure teams are self-sufficient faster through reusable patterns service templates and clear architectural guardrails that accelerate rather than constrain.

Experience youll need to have:

• Significant experience as a senior/principal engineer or technical lead delivering distributed systems in production.

• Deep hands-on experience with modern Java or Kotlin Spring Boot and microservices architectures.

• A track record of shaping technical strategy and architecture direction across multiple teams not just delivering within one.

• Strong experience with event-driven architectures Kafka event sourcing patterns eventual consistency and integration patterns.

• Practical application of domain-driven design both strategic (bounded contexts context mapping) and tactical (aggregates domain events repositories).

• Experience designing for resilience in distributed systems circuit breakers retries timeouts bulkheads graceful degradation.

• Proven ability to coach and influence engineers and architects shifting culture toward pragmatic engineering excellence.

• A conviction that AI-assisted engineering is transformative with experience applying AI tools to accelerate development testing or delivery workflows.

• Experience with iterative delivery vertical slicing walking skeletons integration-first approaches.

Experience that would be great to have:

• Familiarity with payments financial services or high-volume transactional domains is a plus but not essential.

• Exposure to Confluent Cloud AWS Kubernetes GitLab CI or observability tooling (Dynatrace distributed tracing) is beneficial.

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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 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.

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