Ollie Treend
Senior Site Reliability Engineer (SRE) at Shopify
London, England, United Kingdom
Summary
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Rockstar🎓
Top SchoolOllie Treend is a senior Site Reliability Engineer and technical lead with over a decade of experience designing and operating high-traffic, resilient web services for both UK government and global commerce. He combines deep full‑stack expertise in Ruby on Rails and JavaScript with pragmatic SRE practices to balance rapid feature delivery against long‑term stability and tech‑debt reduction. Ollie has led cross‑functional teams at GOV.UK, the Ministry of Justice and the Department for Education, and now applies that delivery mindset to reliability challenges at Shopify. He has hands‑on experience modernising legacy Rails ecosystems—contributing fixes and performance improvements to notable repos like alphagov/whitehall—and building cloud‑native platforms and CI/CD pipelines. A thoughtful mentor and systems thinker, he’s equally comfortable writing code, running incident response shifts, and shaping product roadmaps to make services more maintainable and user‑focused.
11 years of coding experience
13 years of employment as a software developer
The Bishop's Stortford High School
Stackoverflow
106reputation
8kreached
2answers
1question
Github Skills (16)
rspec10
ruby-rails10
rails10
ruby10
mysql9
database-migration9
database-migrations9
api8
pact8
apidoc8
facebook6
ms-access6
facebook-graph-api6
relationship6
ranking6
Programming languages (26)
Github contributions (5)
alphagov/whitehall
Dec 2021 - Jan 2023
Publishes government content on GOV.UK
Role in this project:
Back-end Developer
Back-end DeveloperContributions:591 reviews, 151 commits, 231 PRs in 1 year 1 month
Contributions summary:Ollie primarily contributed to bug fixes and enhancements within the Whitehall repository. Their work involved resolving Pact test failures by correcting branch references, fixing a bug related to special characters in filenames when previewing CSVs, and adding a rake command for republishing drafts. Additionally, the user addressed database migration issues by backfilling the `auth_bypass_id` column and refactoring methods for improved performance. They also updated the code to address Google Analytics tracking parameters.
govgovuk-publishing-frontendgovukgovernmentcontainer
ministryofjustice/wp-knowthething
Aug 2015 - Nov 2017
Contributions:70 pushes, 5 branches, 10 tags in 2 years 3 months
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