Jack Jefferies
Director at Ethereal Technologies
Bristol, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolJack Jefferies is a director-level software engineer with around 10 years of hands-on experience building cloud-native, data-intensive and real-time systems across startups and enterprise clients. Certified as an AWS Solutions Architect and Cloud Developer and Google Cloud certified, he blends full-stack development with DevOps and cloud architecture—having migrated monoliths to microservices, led federated GraphQL supergraphs, and built high-ingestion analytics pipelines. He’s delivered end-to-end products from mobile-friendly dashboards to critical infrastructure control systems, often as sole engineer or interim lead, and has a knack for turning legacy Java platforms into modern, testable Spring Boot services. Equally comfortable in TypeScript/React and Java ecosystems, Jack favors pragmatic automation, CI/CD, and disaster recovery patterns to accelerate reliable releases. Based in Bristol, he runs a personal consultancy (Ethereal Technologies) where he experiments with big data, crypto, and real-time processing—always chasing new tools to keep projects exciting.
10 years of coding experience
10 years of employment as a software developer
Bachelor of Technology (BTech), Computer Games and Programming Skills, MPP, Bachelor of Technology (BTech), Computer Games and Programming Skills, MPP at City of Bristol College GreenGCSE, GCSE, 2B, 7C, GCSE, GCSE, 2B, 7C at Henbury Secondary School
English
Github Skills (19)
apple-pay5
declaration5
binding4
stripe4
api3
android3
react3
ios3
api-client3
react-native3
webpack3
nano3
typescript2
console2
wallet2
Programming languages (5)
Github contributions (5)
DaJaffaMan/etherealtechnologies
Apr 2018 - Apr 2020
Contributions:6 commits, 26 pushes, 1 branch in 2 years 1 month
jackjefferies/easyjob
Feb 2016 - Nov 2016
Contributions:41 pushes, 1 branch, 11 issues in 8 months
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