Senior Software Engineer - Java, Banking and Payments

Senior Software Engineer 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 new opportunities for Senior Software Engineers, working in a high-impact environment that's open and rewarding, so it's a great time to join. 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 containerization Enterprise integration and implementation experience: APIs, event-driven architecture, integration platforms/iPaaSExperience with consuming web services, REST and SOAP based architecture Hands on experience with Spring Boot framework Hands on experience with deploying to AWS platform Hands on experience with GIT Hands on experience with Maven Demonstrated hands-on expertise with AI developer tools (e.g., GitHub Copilot, GPT-powered coding assistants, automated test writers etc. Preferred 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 Demonstrated technical architectural design capability from past projects This is a chance to join a fast-growing company at the forefront of AI-powered banking integration and data innovation. You will work in a collaborative, high-impact environment where your technical expertise directly influences business growth and customer success. At this stage, ownership isn't a talking point - it's the job. You'll drive your space end to end, which means your time and availability flex with what the work actually needs, not a fixed clock. If that type of environment is energizing rather than exhausting, you'll thrive here. PortX Principles Do Everything with PurposeChallenge the OrdinaryCheck your Ego at the Door Benefits Competitive compensation: attractive equity opportunities at a venture-backed startupHigh Impact Role: Have a direct and immediate impact on revenue & scaling the businessInsurance (medical, dental, vision)401(k)Unlimited PTOBe a part of a collaborative and highly motivated team culture where your voice is heard and you're not just a number in a big company US Citizenship required - No Visa Sponsorship available