John Mccaulley
Staff Software Engineer at Walmart Global Tech
Manassas, Virginia, United States
Summary
👤
Senior🎓
Top SchoolJohn Mccaulley is a Staff Software Engineer with nine years of experience designing and operating cloud-native microservices, currently driving platform work at Walmart Global Tech. He specializes in Java ecosystems—Spring, Kafka, Cassandra—and has led GraphQL data orchestration and federation efforts, migrating services from in-house infrastructure to Kubernetes with automated canary deployments. As a tech lead he’s balanced architecture, testing automation and operational resiliency across high-throughput systems, and contributes to the GraphQL community and open source projects. Based in Manassas, VA, he pairs hands-on coding with pragmatic system design and a history of mentoring teams through large-scale transitions. An unexpected thread in his background is early IT and help-desk work that gave him durable operational instincts and a user-focused perspective.
9 years of coding experience
7 years of employment as a software developer
Associate of Science (AS) Computer Science, Associate of Science (AS) Computer Science at Northern Virginia Community CollegeBachelor’s Degree Computer Science, Bachelor’s Degree Computer Science at George Mason University
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (52)
zpl10
sd-card10
spring-graphql10
java10
endpoint10
graphql-java10
apollo-federation9
graphiql9
octoprint9
servlet9
gateway9
voron9
api9
cnc9
nodejs9
Programming languages (7)
Github contributions (5)
jmccaull/moonraker
Dec 2022 - Feb 2023
Web API Server for Klipper
Contributions:53 pushes, 4 branches in 1 month
apirestfulnodejsweb-apiapi-server
jmccaull/graphql-java-servlet
Jan 2019 - Jul 2019
Servlet endpoint for GraphQL Java
Contributions:23 pushes, 6 branches in 5 months
graphql-javaendpointservletgraphqlgraphql-query
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