Senior Java Developer – High-Volume Fintech APIs

re-zoo-me; Alpharetta, Northern (GA, KY); Hybrid; USD 120,000 - 150,000; Full time

Job summary

Fiserv is seeking a Java Developer to join its engineering team to design and deliver high-volume, resilient systems leveraging modern APIs, microservices, cloud infrastructure, and integrations. You will collaborate with product managers, clients, and cross-functional teams to shape solution architecture and ensure reliable production systems.

The role emphasizes on-site work, strong engineering collaboration, and contributions to CI/CD and DevSecOps practices to enable secure deployments and

Qualifications

• 5+ years building high-volume Java/J2EE systems.
• 3+ years RESTful APIs with Java/Spring Boot.
• 3+ years object-oriented design, debugging & testing.
• Experience with Kafka, MQ, ESB.
• SQL and NoSQL databases.
• Strong CI/CD and DevSecOps practices.
• Knowledge of 12-Factor cloud-native services.

Responsibilities

• Define and implement solution architecture for high‑volume, resilient systems.
• Design, develop, debug and test Java/J2EE code and RESTful APIs.

Skills

Java/J2EE

RESTful APIs

CI/CD

Design patterns

Cloud-native

Tools

Spring Boot

Kafka

MQ

ESB

SQL/NoSQL databases

Job description

Fiserv is seeking a Java Developer to join its engineering team to design and deliver high-volume, resilient systems leveraging modern APIs, microservices, cloud infrastructure, and integrations. You will collaborate with product managers, clients, and cross-functional teams to shape solution architecture and ensure reliable production systems.

The role emphasizes on-site work, strong engineering collaboration, and contributions to CI/CD and DevSecOps practices to enable secure deployments and