Staff Software Engineer / Architect Java Modernization (AWS / Kubernetes)

Yantran LLC · O'Fallon, Missouri, United States

Location
O'Fallon, Missouri
Job Type
Full-time
Posted
May 15, 2026

Job Description

Position Title:

Staff Software Engineer / Architect – Java Modernization (AWS / Kubernetes)

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

M...

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