Senior Software Architect — Payments & Enterprise Systems

PayJunction; United States; Hybrid; USD 240,000 - 275,000; Full time

Benefits offered by this job

Health, dental, vision coverage

401k with match

Paid time off

Home office equipment stipend

Learning stipend

Flexible work arrangements

Job summary

PayJunction is seeking a Software Architect to design and build enterprise features and payment integrations, taking open-ended problems from a blank page to production while still writing Java yourself.

You will lead strategic initiatives with Product and Engineering, design high-risk systems end to end, and stay hands-on with production Java code while mentoring engineers and guiding architectural decisions across services.

Qualifications

• 10+ years of professional software engineering with ownership of production systems.
• 5+ years of architecture experience as an Architect, Staff, or Principal Engineer.
• 5+ years of Java, including web frameworks and the JVM ecosystem.
• 5+ years mentoring senior and mid-level engineers through code review and pairing.
• Experience with AWS, Linux, relational databases (MySQL), CI/CD (Jenkins or comparable), IaC (Puppet or similar), and observability tooling (Splunk, Grafana, Prometheus).
• Designed and operated a high-availability transactional system with financial impact.
• Currently uses AI coding assistants in production work.

Responsibilities

• Lead open-ended initiatives from a blank page to production with Product and Engineering leadership.
• Design the highest-risk systems end to end with clear requirements, trade-offs, and failure modes.
• Write production Java every sprint and enforce a robust test strategy for high-risk paths.
• Mentor senior engineers through design and code reviews.
• Architect enterprise capabilities like SSO, RBAC, audit trails, and multi-merchant APIs.
• Keep core platform processor-agnostic and optimize processor integrations.
• Design for reliability and PCI compliance, define SLOs, monitoring, and RCAs.
• Incorporate AI-assisted development with appropriate guardrails.

Skills

Java

Architecture

Mentoring

AWS

Linux

MySQL

CI/CD

IaC

Observability

AI coding

Education

BS in Computer Science

Tools

Jenkins

Puppet

Splunk

Grafana

Prometheus

Job description

PayJunction is seeking a Software Architect to design and build enterprise features and payment integrations, taking open-ended problems from a blank page to production while still writing Java yourself.

You will lead strategic initiatives with Product and Engineering, design high-risk systems end to end, and stay hands-on with production Java code while mentoring engineers and guiding architectural decisions across services.