Senior Java Engineer — Payments & Low-Latency Systems

Socket.dev; Warsaw; Hybrid; CAD 169,000 - 226,000; Full time

Job summary

Socket.dev is seeking a Senior Java Engineer to join a high-performance team. You will design and optimize low-latency backend systems using Java, Spring Boot, and microservices, deployed on OpenShift/Kubernetes in AWS.

You will build secure APIs, handle real-time data in MongoDB, and mentor peers while driving performance and reliability across services. The role emphasizes architectural leadership, collaboration with DevOps and QA, and a strong bias toward practical, opinionated design

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

Spring Boot

MongoDB

Microservices

Low-latency design

AWS

OpenShift

Kubernetes

Communication skills

Tools

OpenShift

Kubernetes

AWS

Job description

Socket.dev is seeking a Senior Java Engineer to join a high-performance team. You will design and optimize low-latency backend systems using Java, Spring Boot, and microservices, deployed on OpenShift/Kubernetes in AWS.

You will build secure APIs, handle real-time data in MongoDB, and mentor peers while driving performance and reliability across services. The role emphasizes architectural leadership, collaboration with DevOps and QA, and a strong bias toward practical, opinionated design