Johno Crawford
Senior Software Architect at Sulake
Pordenone, Friuli – Venezia Giulia, Italy
Summary
🤩
Rockstar🎓
Top SchoolJohno Crawford is a Senior Software Architect with 15 years of hands-on experience designing and hardening backend systems, currently leading architecture at Sulake from Pordenone, Italy. He thrives on debugging and performance bottlenecks, with a track record of improving stability and robustness in high-impact open-source projects like HikariCP, Netty, and Jenkins. His contributions span JVM internals, Redis-based caching (hibernate-redis, Redisson) and developer tooling (hub4j/github-api), showing deep expertise in Java, concurrency and distributed data structures. Johno combines production-minded engineering with careful refactoring and edge-case fixes—unwrapping exceptions, handling locale/encoding issues, and closing subtle resource leaks. Comfortable across backend and DevOps domains, he often surfaces non-obvious reliability improvements that reduce operational risk. His long tenure at Sulake reflects both technical depth and sustained impact on large-scale product systems.
15 years of coding experience
16 years of employment as a software developer
Canberra College
Stackoverflow
476reputation
42kreached
6answers
2questions
Github Skills (66)
apim10
multithreading10
utf10
plugin-development10
javas10
object-cache10
concurrency10
client-library10
zendesk-api10
async10
keyv10
redis-client10
continuous-delivery10
api10
github-api10
Programming languages (19)
Github contributions (5)
cloudbees-oss/zendesk-java-client
Nov 2013 - Jun 2018
A Java client library for interacting with Zendesk
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 20 commits, 40 PRs in 4 years 7 months
Contributions summary:Johno focused on enhancing the Zendesk Java client library by addressing character encoding issues and supporting new features. They ensured API request payloads used UTF-8 charset and added support for Zendesk macros. Additionally, the user fixed a typo and addressed a pagination issue within the library. The contributions improve the client's functionality and data handling.
javazendesksupport-team
debop/hibernate-redis
Sep 2016 - Jan 2017
hibernate 2nd level cache privder using redis
Role in this project:Back-end Developer
Back-end DeveloperContributions:37 commits, 10 PRs, 31 pushes in 3 months
Contributions summary:Johno primarily contributed to the `hibernate-redis` project, focusing on maintaining and improving the Hibernate second-level cache provider using Redis. Their contributions involved minor code cleanup and merging of branches. The user also worked on simplifying region configuration and adding support for a Redisson-backed Timestamper. The user fixed issues with the creation of Redis clients when PersistentBags were cloned.
hibernaterediscacheredisson
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