Senior Java Engineer (Payments)

TL;DR

Senior Java Engineer (Payments): Building and optimizing low-latency, high-throughput backend services for secure payment processing with an accent on Core Java, Spring Boot, microservices, and cloud deployment. Focus on designing real-time APIs, tuning performance and memory usage, and improving fault tolerance and observability in production systems.

Location: Hybrid work model in New York, United States

Salary: $130,000–$150,000 annually, plus potential bonuses, commissions, and benefits.

Company

Business and technology consulting company providing tailored engineering and digital transformation services to enterprise clients, including Fortune 500 organizations.

What you will do

• Design, develop, and optimize low-latency, high-throughput backend systems in Java.
• Build and maintain RESTful APIs and microservices for secure payment workflows.
• Deploy, monitor, and scale services using Red Hat OpenShift, Kubernetes, and AWS.
• Integrate MongoDB and other NoSQL and SQL datastores for real-time data management.
• Drive architectural improvements, performance tuning, fault tolerance, and observability.
• Collaborate with DevOps, Product, and QA teams while mentoring engineers and promoting engineering best practices.

Requirements

• 10+ years of Java development experience focused on performance and memory optimization.
• Strong proficiency with Core Java, Spring, Spring Boot, MongoDB, and microservice architecture.
• Experience building low-latency, high-throughput applications.
• Hands-on experience with Red Hat OpenShift and/or Kubernetes.
• Strong AWS experience, including services such as ECS, EKS, Lambda, and S3.
• Strong communication skills and a bias toward decisive, opinionated design.

Nice to have

• Experience with Kafka, RabbitMQ, or similar messaging systems.
• Background in payment processing, financial services, or banking.
• Knowledge of payment gateways, ISO 20022, or SWIFT formats.
• Experience with container security and OpenShift performance tuning.

Culture & Benefits

• Collaborative, fast-paced, and engineering-driven environment.
• Emphasis on engineering autonomy and architectural decision-making.
• Focus on clean code and production-grade solutions.
• Potential eligibility for additional compensation and benefits.