Senior Java Engineer, Contract

This position is Seattle based.

PortX is a leading AI-powered data and integration company for modern banking, bringing systems together and data to life through our unified platform for modern integration, governed customer 360 data, and next-generation payments.

We're in strong growth mode, with opportunities for Senior Software Engineers, working in a high-impact environment, so it's a great time to get involved.

Day to day responsibilities include:

• Hands-on development for PortX customer integration projects.
• Build and enhance APIs, backend services, and integration components across modern banking and payments environments.
• Design, develop, test, and maintain high-quality solutions for PortX customer integration projects.
• Use modern AI tools responsibly to accelerate engineering productivity, code quality, testing, and documentation.
• Troubleshoot, diagnose, and resolve customer-reported technical issues in a timely manner, including root cause analysis and permanent fixes where appropriate.
• Participate in architectural and technical design discussions, helping define robust, secure, and maintainable solutions.
• Contribute to deployment, configuration, and operational support processes across cloud-based environments, primarily AWS.
• Write clean, maintainable, well-tested code and contribute to continuous improvement of engineering standards, tooling, and development practices.
• Collaborate with cross-functional teams to improve system performance, reliability, observability, and scalability.
• Create and maintain technical documentation relating to implementations, integrations, troubleshooting, and support handover.

Required skills:

• Strong Java development experience, as main programming language
• Hands on experience with Docker and Kubernetes
• Experience with consuming web services, REST and SOAP based architecture
• Hands on experience with Spring Boot framework
• Hands on experience with deploying to AWS platform
• Knowledge and experience with integration, APIs, ESBs, etc
• Hands on experience with GIT
• Hands on experience with Maven
• Demonstrated hands-on expertise with AI developer tools

Desirable skills:

• Banking, credit union, or payments domain experience (core banking systems, digital banking, ACH/ISO 20022).
• Hands on experience with integration framework, such as Apache Camel

USC required/no sponsorship available.