Software Architect, Backend Developer, Java Developer

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Pay Junction is seeking a Software Architect to design and build the enterprise features and payment integrations our partners rely on to move billions of dollars a year, taking open-ended problems from a blank page to production while still writing Java yourself.

Pay Junction is relentless and emphatic about helping others. We exist to drive the success of our partners. Specifically, the developers who connect to us, businesses who process payments through us, and all of our team members who work with us at Pay Junction.

We believe dreams inspire people to start a business, and others to partner with them. While building dreams, entrepreneurs and business professionals will face many challenges along the way. We believe great partners can make all the difference.

We are your dream partner.

Your success is our success.

Our dream is to help you realize yours.

We exist to drive the success of our partners. We do this by fundamentally changing the way you transact with others. We just happen to make great payment systems. If you love helping others succeed, in a culture that celebrates perfecting your craft, consider partnering with us.

Pay Junction takes a Flex First approach to work environments. This means that our team members can choose to work from our Santa Barbara office or remotely from home. We ensure that everyone has the resources and equipment to work where they feel most productive. We trust our teams to make the best decision for their work environment. All Pay Junction employees must reside in one of the following states: CA, IL, TX, MN, CO, GA, NY, MA, CT.

Our Engineering team’s mission is to design, develop, and maintain the products, technology, and systems that drive our partners' success.

Thousands of partners love and rely on our platform to make payments simple.

• Lead open-ended initiatives from a blank page to production with Product and Engineering leadership, breaking the problem down, directing other engineers, and making the calls that keep the team moving.
• Personally design the highest-risk systems end to end, writing design docs clear enough to build from, with requirements, trade-offs, and failure modes stated up front.
• Stay hands-on: write production Java every sprint, review pull requests promptly, and hold work to a test strategy built for high-risk payment paths.
• Mentor senior engineers through design reviews, code reviews, and pairing, growing the team's design capability so not every decision runs through you.
• Architect enterprise capabilities such as SSO, role-based access, audit trails, and multi-merchant hierarchy, plus versioned APIs partners can build on without breaking changes.
• Keep the core platform processor-agnostic and our processor integrations performing optimally, from message mapping through reversals and settlement reconciliation.
• Design for reliability and PCI from the start: define SLOs and monitoring, remove single points of failure, lead root-cause analysis, and shrink PCI scope by design.
• Raise the team's delivery velocity with AI-assisted development, setting review and security guardrails for AI-generated code.

• 10+ years of professional software engineering, with hands-on ownership of production systems.
• 5+ years of architecture experience as an Architect, Staff, or Principal Engineer, owning designs that span multiple services or teams.
• 5+ years of Java, including web frameworks and the JVM ecosystem, with production Java written in the last 12 months.
• 5+ years mentoring senior and mid-level engineers through code review, design review, and pairing; formal people management not…