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Senior Software Engineer

1 week ago
United States
Full-time
Senior
Software Engineer
Software Development
Java Kubernetes OpenShift Oracle PostgreSQL
Apply Now
Kunai

Kunai

Kunai is a leading digital product development consultancy for fintech, delivering innovative solutions trusted by Fortune 500 companies and startups worldwide.

Professional Services
51-250
Founded 2001
View All Jobs 2

Description

  • Design and execute enterprise-grade performance testing strategies for payment processing services, including frameworks, tooling, and success criteria.
  • Identify bottlenecks across legacy and modern service layers and drive performance improvements through analysis and optimization.
  • Instrument and validate services running on Java, Oracle, Tomcat, WebSphere, PostgreSQL, and OpenShift.
  • Collaborate with backend engineers to ensure scalability requirements are met before release.
  • Translate performance findings into clear recommendations for engineering leads and stakeholders.
  • Build and maintain backend services supporting card network integration, primarily in Java, PostgreSQL, and OpenShift Container Platform.
  • Contribute to application modernization by migrating and re-platforming services from legacy infrastructure to cloud-native environments.
  • Participate in code reviews, architectural discussions, and cross-team technical planning sessions.
  • Work on PCI data purging pipelines and event-driven architecture patterns, including token removal and event consumption.
  • Serve as a flexible senior contributor across teams where engineering depth and experience are needed most.

Requirements

  • 5+ years of professional software engineering experience, primarily in Java.
  • Strong working knowledge of relational databases, with Oracle and/or PostgreSQL required.
  • Experience deploying and operating services in containerized environments such as OpenShift, Kubernetes, or equivalent.
  • At least one enterprise-level performance testing engagement, including strategy definition, tool selection, execution, and presentation of findings.
  • Experience with performance profiling, load testing, and bottleneck resolution in high-throughput distributed systems.
  • Ability to design streamlined test frameworks from scratch and operate with minimal guidance.
  • Background in digital payments, card processing, or financial services technology is strongly preferred.
  • Understanding of PCI compliance requirements and secure data handling practices.
  • Demonstrated ability to work effectively in large, matrixed program environments with multiple teams and stakeholders.
  • Strong written and verbal communication skills, with the ability to translate technical complexity for non-technical audiences.
  • Familiarity with legacy enterprise application servers such as Tomcat and/or WebSphere is a plus.
  • Experience with PGLogical or PostgreSQL logical replication is a plus.
  • Exposure to AI-assisted development tools such as GitHub Copilot or Claude is a plus.
  • Prior work on bank or card network integration programs is a plus.
  • Experience working in segregated or air-gapped development environments is a plus.
  • Bachelor’s degree is required, or equivalent specialized training and progressively responsible technology work experience in lieu of a degree.

Benefits

  • Competitive compensation.
  • Professional development opportunities.
  • Flexible work arrangements.
  • A collaborative culture that values creativity and continuous learning.
  • An environment where employees feel valued and have a voice.
  • Opportunities to grow personally and professionally.
  • Support for innovation in the fintech industry.

Interested in this position?

Apply directly on the company website

Apply Now

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