Staff Software Engineer Architect

Location: St. Louis, MO

JD

We are looking for a staff level software engineer / architect to lead the modernization of a largescale, mission critical Java platform. This role is hands on and focused on rewriting and re architecting existing systems using modern Java, Spring Boot, and cloud native patterns on AWS.

What You'll Do

• Modernize a legacy Java platform to Java 21 and Spring Boot
• Re architect monolithic components into well structured, cloud native services
• Design and build services for AWS EKS and/or OpenShift
• Define execution models, service boundaries, and deployment patterns
• Drive architectural decisions around performance, scalability, and reliability
• Work closely with platform, DevOps, and cloud infrastructure teams
• Mentor senior engineers and set engineering standards
• Own solutions end to end from design through production

What We're Looking For

• Staff level experience building and modernizing large Java systems
• Strong hands on experience with Java (17+ preferred, 21 ideal) and Spring Boot
• Deep understanding of distributed systems and system design
• Practical experience deploying applications on AWS, preferably EKS
• Solid Kubernetes knowledge (EKS and/or OpenShift)
• Experience containerizing applications and running them on a scale
• Strong grasp of performance tuning, JVM behavior, and low latency systems
• Ability to operate as both architect and hands on engineer

Nice to Have

• Experience migrating from monoliths to cloud native architectures
• Exposure to eventing, messaging, or streaming systems (Kafka, MQ, etc.)
• Familiarity with CI/CD pipelines and infrastructure as code
• Background in financial services, payments, or high throughput systems

Why This Role

• Opportunity to shape the future architecture of a critical platform
• Work on complex, high scale systems where design decisions matter
• High ownership, real technical impact, and long term relevance