Principal Java Engineer - Low-Latency Payments

RE Partners

New Jersey

Hybrid

USD 130,000 - 170,000

Full time

2 days ago

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Job summary

RE Partners is seeking an experienced Principal Java Engineer to join our high-performing engineering team. You will design, develop, and optimize low-latency, high-throughput backend systems in the payments domain, delivering secure RESTful APIs and microservices.

The role requires strong Core Java and SpringBoot expertise, hands-on OpenShift/Kubernetes deployment, and a collaborative, opinionated culture. Hybrid work in NY/NJ and competitive compensation offered.

Qualifications

10+ years of Java development with a focus on performance and memory optimization.
Proficient in MongoDB, Spring, and microservice-based architecture.
Experience with low-latency, high-throughput applications (sub-millisecond response times a plus).
Hands-on experience deploying applications on OpenShift and/or Kubernetes.
Strong cloud experience with AWS services (ECS, EKS, Lambda, S3, etc.).
Strong communication skills and a bias toward action and opinionated design decisions.

Responsibilities

Design, develop, and optimize low-latency, high-throughput backend systems using Java.
Build and maintain RESTful APIs and microservices powering secure payment workflows.
Collaborate with DevOps, Product, and QA to ensure production-grade solutions.
Deploy, monitor, and scale applications in OpenShift and AWS environments.
Drive architectural changes and mentor peers.