Senior Software Architect – Payments & Enterprise APIs

PayJunction; Minnesota; Hybrid; USD 240,000 - 275,000; Full time

Benefits offered by this job

Health, dental, vision paid 100% by 회사

401k with 6% match

Disability coverage

Job summary

PayJunction 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. Our engineers work flexibly from Santa Barbara or remote locations, with a focus on scalable, secure payment systems.

The role demands 10+ years of software engineering, 5+ years in architecture, and hands‑on Java with AWS, Linux, and

Qualifications

• 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.
• 5+ years of Java, including web frameworks and the JVM ecosystem.
• 5+ years mentoring senior and mid‑level engineers through code review, design review, and pairing; formal people management not required.
• Production experience with AWS, Linux (Ubuntu/Debian), relational databases (MySQL preferred), CI/CD (Jenkins or comparable), infrastructure as code (Puppet or similar), and observability tooling (Splunk, Grafana, Prometheus, or comparable).
• Designed and operated a high‑availability transactional system where downtime or data loss had direct financial or customer impact.

Responsibilities

• 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.

Skills

Java

Architecture

AWS

CI/CD

Observability

Education

BS in CS

Tools

Jenkins

Puppet

Grafana

Prometheus

Splunk

MySQL

Job description

PayJunction 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. Our engineers work flexibly from Santa Barbara or remote locations, with a focus on scalable, secure payment systems.

The role demands 10+ years of software engineering, 5+ years in architecture, and hands‑on Java with AWS, Linux, and