Principal Java Engineer – Real-Time Payments, Low-Latency

RE Partners; Jacksonville (FL); Hybrid; USD 130,000 - 150,000; Full time

Job summary

RE Partners is seeking a Senior Java Engineer to join our engineering team, focusing on low-latency, high-throughput systems in payments processing. This hybrid role is based in New York and offers real-time services built with Java, Spring Boot, and microservices.

The ideal candidate has 10+ years of Java experience, strong MongoDB/Spring skills, and hands-on OpenShift/Kubernetes deployment with AWS cloud exposure.

Qualifications

• 10+ years of experience in Java development with a focus on performance and memory optimization.
• Proficient in Mongo, Spring and microservice-based architecture.
• Proven 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 such as 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 that power secure payment workflows.
• Work with messaging standards and protocols commonly used in financial transactions.
• Deploy, monitor, and scale applications in Red Hat OpenShift and AWS cloud environments.
• Integrate with MongoDB and other NoSQL/SQL datastores for real-time data management.
• Collaborate with DevOps, Product, and QA teams to ensure production-grade solutions.
• Drive architectural changes, advocate for best practices, and provide mentorship to peers.
• Drive performance tuning, fault tolerance, and observability improvements across services.

Skills

Java performance

Microservices

Low latency design

AWS cloud

Mentorship

Tools

OpenShift

Kubernetes

MongoDB

Spring Boot

REST APIs

Job description

RE Partners is seeking a Senior Java Engineer to join our engineering team, focusing on low-latency, high-throughput systems in payments processing. This hybrid role is based in New York and offers real-time services built with Java, Spring Boot, and microservices.

The ideal candidate has 10+ years of Java experience, strong MongoDB/Spring skills, and hands-on OpenShift/Kubernetes deployment with AWS cloud exposure.