Senior Software Engineer (Fully Remote)

Kunai; United States; Remote; USD 150,000 - 210,000; Full time

Job summary

Kunai seeks an experienced backend engineer in the United States to build and maintain full-stack backend services for card network integration using Java and PostgreSQL, hosted on OpenShift. You will design event-driven architectures with Kafka and integrate business rules engines like Drools.

You will own AWS IAM, S3, and CloudFront configurations, and manage end-to-end OAuth2/OIDC identity flows. The role emphasizes performance testing, TDD, and CI/CD pipeline development to ensure robust

Qualifications

• Experience building backend services in Java and PostgreSQL.
• Experience with cloud and identity management (AWS IAM, OAuth2/OIDC).
• Experience with event-driven architectures (Kafka) and rules engines (Drools).
• Design and implement performance tests and CI/CD pipelines.

Responsibilities

• Build and maintain backend services for card network integration in Java and PostgreSQL.
• Develop event-driven architectures with Kafka and integrate Drools rules engines.
• Govern AWS IAM, S3, and CloudFront across environments and own identity flows (OAuth2/OIDC).
• Design performance testing strategies, drive TDD, and build robust CI/CD pipelines for payment services.

Skills

Java

PostgreSQL

OpenShift

Kafka

Drools

OAuth2/OIDC

IAM (AWS)

CloudFront

CI/CD

Testing & Performance

Tools

Kafka

OpenShift

Drools

OAuth2/OIDC

AWS IAM

CI/CD pipelines

Unit/Integration/E2E testing

Job description

• Build and maintain full-stack backend services for card network integration using Java, PostgreSQL, and OpenShift.
• Develop event-driven architectures with Kafka and integrate business rules engines like Drools.

Cloud & Identity:

• Govern AWS IAM, S3, and CloudFront architecture across environments.
• Own OAuth2/OIDC identity flows end-to-end, including provider integration and token validation.

Testing & Performance:

• Design and execute enterprise-level performance testing strategies for payment services.
• Drive TDD practices and build CI/CD pipelines with unit, contract, integration, and end-to-end tests.

Kunai builds full-stack technology solutions for banks, credit and payment networks, infrastructure providers, and their customers. With over 20 years of success, the company fosters a culture of collaboration, creativity, and continuous learning.