John Mccaulley
Staff Software Engineer at Walmart Global Tech
Manassas, Virginia, United States
Summary
👤
Senior🎓
Top SchoolJohn Mccaulley is a Staff Software Engineer at Walmart Global Tech with nine years of experience delivering scalable cloud-native microservices. He specializes in the Java ecosystem—Spring, GraphQL, Kafka, and Cassandra—and has led architecture for Spring-based GraphQL data orchestration and federation services. At Walmart Labs, he was a tech lead for two teams and steered the transition from in-house cloud infrastructure to Kubernetes, including automated testing and canary deployments. An active contributor to the GraphQL community and open-source projects, he blends hands-on coding with system design and mentorship. Based in Manassas, Virginia, he holds a CS degree from George Mason University and brings a practical, production-focused approach to complex distributed systems.
9 years of coding experience
7 years of employment as a software developer
Associate of Science (AS), Computer Science, 3.4, Associate of Science (AS), Computer Science, 3.4 at Northern Virginia Community CollegeBachelor’s Degree, Computer Science, 2.97, Bachelor’s Degree, Computer Science, 2.97 at George Mason University
Stackoverflow
1reputation
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Github Skills (56)
zpl10
web-api10
sd-card10
spring-graphql10
java10
endpoint10
graphql-java10
apollo-federation9
graphiql9
octoprint9
servlet9
gateway9
voron9
api9
cnc9
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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