Senior Java Engineer - Low-Latency Payments

RE Partners Consulting; New York (NY); On-site; USD 130,000 - 150,000; Full time

Job summary

RE Partners Consulting is seeking an experienced Senior Java Engineer to join our high-performing engineering team, delivering low-latency, high-throughput backend services in payments processing. You’ll apply strong Core Java and Spring Boot expertise to build scalable systems.

You’ll deploy and operate on OpenShift and Kubernetes, use AWS services (ECS/EKS/Lambda/S3), work with MongoDB and other datastores, and collaborate with DevOps, Product, and QA while mentoring peers to raise engineering

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 Red Hat 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 development

Performance optimization

Microservices architecture

Cloud - AWS

OpenShift / Kubernetes

Communication & action bias

Tools

MongoDB

Spring Boot

OpenShift

Kubernetes

REST APIs

AWS (ECS/EKS/Lambda/S3)

Job description

RE Partners Consulting is seeking an experienced Senior Java Engineer to join our high-performing engineering team, delivering low-latency, high-throughput backend services in payments processing. You’ll apply strong Core Java and Spring Boot expertise to build scalable systems.

You’ll deploy and operate on OpenShift and Kubernetes, use AWS services (ECS/EKS/Lambda/S3), work with MongoDB and other datastores, and collaborate with DevOps, Product, and QA while mentoring peers to raise engineering